overriding GridView.OnRowDeleting - can call registered event handlers


T

TS

Hello, I have a custom GridView and it overrides onRowDeleting and doesn't
call base.OnRowDeleting because the person implementing had undesirable
effects. the problem is I now when clients of this control register their
own event handlers for RowDeleting, it is never raised.

I'm trying to add lines 1 - 5 to my overriden OnRowDeleting method but can't
because the key accessed in base.Events is EventRowDeleting, which is an
object that is a private constant that i dont have access to in my derived
control.

How do I get a handle to any event handlers so I can call them???

// this is the dissasembled method for GridView:
protected virtual void OnRowDeleting(GridViewDeleteEventArgs e){ bool
isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
GridViewDeleteEventHandler handler = (GridViewDeleteEventHandler)
base.Events[EventRowDeleting];2 if (handler != null)3 {4
handler(this, e);5 } else if (!isBoundUsingDataSourceID && !e.Cancel)
{ throw new HttpException(SR.GetString("GridView_UnhandledEvent",
new object[] { this.ID, "RowDeleting" })); }}
 
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A

Allen Chen [MSFT]

Hi,

As you said, it's a private field so we cannot access it in the custom
GridView. I think we'd better focus on your following statement:

I have a custom GridView and it overrides onRowDeleting and doesn't
call base.OnRowDeleting because the person implementing had undesirable
effects.

Could you tell me what're the undesirable effects and your requirement as
well? I think if we can eliminate them this issue can be worked around.

Regards,
Allen Chen
Microsoft Online Support

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
(e-mail address removed).

==================================================
Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.

Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
where an initial response from the community or a Microsoft Support
Engineer within 1 business day is acceptable. Please note that each follow
up response may take approximately 2 business days as the support
professional working with you may need further investigation to reach the
most efficient resolution. The offering is not appropriate for situations
that require urgent, real-time or phone-based interactions or complex
project analysis and dump analysis issues. Issues of this nature are best
handled working with a dedicated Microsoft Support Engineer by contacting
Microsoft Customer Support Services (CSS) at
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
==================================================
This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
| From: "TS" <[email protected]>
| Subject: overriding GridView.OnRowDeleting - can call registered event
handlers
| Date: Mon, 20 Oct 2008 16:17:30 -0500
| Lines: 24
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <#[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.193
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| Hello, I have a custom GridView and it overrides onRowDeleting and
doesn't
| call base.OnRowDeleting because the person implementing had undesirable
| effects. the problem is I now when clients of this control register their
| own event handlers for RowDeleting, it is never raised.
|
| I'm trying to add lines 1 - 5 to my overriden OnRowDeleting method but
can't
| because the key accessed in base.Events is EventRowDeleting, which is an
| object that is a private constant that i dont have access to in my
derived
| control.
|
| How do I get a handle to any event handlers so I can call them???
|
| // this is the dissasembled method for GridView:
| protected virtual void OnRowDeleting(GridViewDeleteEventArgs e){ bool
| isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| GridViewDeleteEventHandler handler = (GridViewDeleteEventHandler)
| base.Events[EventRowDeleting];2 if (handler != null)3 {4
| handler(this, e);5 } else if (!isBoundUsingDataSourceID &&
!e.Cancel)
| { throw new HttpException(SR.GetString("GridView_UnhandledEvent",
| new object[] { this.ID, "RowDeleting" })); }}
|
|
|
|
|
 
T

TS

So it looks like the "else if" section of the posted code below is getting
run, which throws an exception and this is why that base.OnRowDeleting is
commented out. Our custom OnRowDeleting does a lot of stuff in it that is
common to every grid. The only thing the base class does is call any
registered delegates. So if we dont add event handler in aspx page for
onRowDeleting, the base class will throw this error.

We want to not have to attach custom event handlers in every aspx page that
uses the grid control and just let our custom gridView handle all the
processing in all the grid events (onRowEditing, onRowUpdating,
onRowDeleting, etc.), but I need to be able to support overriding this
behavior sometimes by adding a custom event handler in my aspx page.

Could I override the each Event Handler's add/remove properties so that i
can handle the Event[] collection myself and then i'll be able to call the
individually registered delegates?
public event GridViewDeleteEventHandler RowDeleting

{

add

{

base.Events.AddHandler(EventRowDeleting, value);

}

remove

{

base.Events.RemoveHandler(EventRowDeleting, value);

}

}


Allen Chen said:
Hi,

As you said, it's a private field so we cannot access it in the custom
GridView. I think we'd better focus on your following statement:

I have a custom GridView and it overrides onRowDeleting and doesn't
call base.OnRowDeleting because the person implementing had undesirable
effects.

Could you tell me what're the undesirable effects and your requirement as
well? I think if we can eliminate them this issue can be worked around.

Regards,
Allen Chen
Microsoft Online Support

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
(e-mail address removed).

==================================================
Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.

Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
where an initial response from the community or a Microsoft Support
Engineer within 1 business day is acceptable. Please note that each follow
up response may take approximately 2 business days as the support
professional working with you may need further investigation to reach the
most efficient resolution. The offering is not appropriate for situations
that require urgent, real-time or phone-based interactions or complex
project analysis and dump analysis issues. Issues of this nature are best
handled working with a dedicated Microsoft Support Engineer by contacting
Microsoft Customer Support Services (CSS) at
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
==================================================
This posting is provided "AS IS" with no warranties, and confers no
rights.

--------------------
| From: "TS" <[email protected]>
| Subject: overriding GridView.OnRowDeleting - can call registered event
handlers
| Date: Mon, 20 Oct 2008 16:17:30 -0500
| Lines: 24
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <#[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.193
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| Hello, I have a custom GridView and it overrides onRowDeleting and
doesn't
| call base.OnRowDeleting because the person implementing had undesirable
| effects. the problem is I now when clients of this control register
their
| own event handlers for RowDeleting, it is never raised.
|
| I'm trying to add lines 1 - 5 to my overriden OnRowDeleting method but
can't
| because the key accessed in base.Events is EventRowDeleting, which is an
| object that is a private constant that i dont have access to in my
derived
| control.
|
| How do I get a handle to any event handlers so I can call them???
|
| // this is the dissasembled method for GridView:
| protected virtual void OnRowDeleting(GridViewDeleteEventArgs e){
bool
| isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| GridViewDeleteEventHandler handler = (GridViewDeleteEventHandler)
| base.Events[EventRowDeleting];2 if (handler != null)3 {4
| handler(this, e);5 } else if (!isBoundUsingDataSourceID &&
!e.Cancel)
| { throw new
HttpException(SR.GetString("GridView_UnhandledEvent",
| new object[] { this.ID, "RowDeleting" })); }}
|
|
|
|
|
 
A

Allen Chen [MSFT]

Hi,

Thanks for your clarification. To achieve your requirement I would suggest
you attach an event handler in the constructor method instead of overriding
the OnRowDeleting method.

public class MyGridView : GridView
{

public MyGridView()
{
this.RowDeleting += new
GridViewDeleteEventHandler(MyGridView_RowDeleting);
}
void MyGridView_RowDeleting(object sender, GridViewDeleteEventArgs
e)
{
//Your code here
}
}

Please have a try and let me know if it's what you need.

Regards,
Allen Chen
Microsoft Online Support

--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Tue, 21 Oct 2008 11:38:04 -0500
| Lines: 136
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.193
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| So it looks like the "else if" section of the posted code below is
getting
| run, which throws an exception and this is why that base.OnRowDeleting is
| commented out. Our custom OnRowDeleting does a lot of stuff in it that is
| common to every grid. The only thing the base class does is call any
| registered delegates. So if we dont add event handler in aspx page for
| onRowDeleting, the base class will throw this error.
|
| We want to not have to attach custom event handlers in every aspx page
that
| uses the grid control and just let our custom gridView handle all the
| processing in all the grid events (onRowEditing, onRowUpdating,
| onRowDeleting, etc.), but I need to be able to support overriding this
| behavior sometimes by adding a custom event handler in my aspx page.
|
| Could I override the each Event Handler's add/remove properties so that i
| can handle the Event[] collection myself and then i'll be able to call
the
| individually registered delegates?
| public event GridViewDeleteEventHandler RowDeleting
|
| {
|
| add
|
| {
|
| base.Events.AddHandler(EventRowDeleting, value);
|
| }
|
| remove
|
| {
|
| base.Events.RemoveHandler(EventRowDeleting, value);
|
| }
|
| }
|
|
| | > Hi,
| >
| > As you said, it's a private field so we cannot access it in the custom
| > GridView. I think we'd better focus on your following statement:
| >
| > I have a custom GridView and it overrides onRowDeleting and doesn't
| > call base.OnRowDeleting because the person implementing had undesirable
| > effects.
| >
| > Could you tell me what're the undesirable effects and your requirement
as
| > well? I think if we can eliminate them this issue can be worked around.
| >
| > Regards,
| > Allen Chen
| > Microsoft Online Support
| >
| > Delighting our customers is our #1 priority. We welcome your comments
and
| > suggestions about how we can improve the support we provide to you.
Please
| > feel free to let my manager know what you think of the level of service
| > provided. You can send feedback directly to my manager at:
| > (e-mail address removed).
| >
| > ==================================================
| > Get notification to my posts through email? Please refer to
| >
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| >
| > Note: The MSDN Managed Newsgroup support offering is for non-urgent
issues
| > where an initial response from the community or a Microsoft Support
| > Engineer within 1 business day is acceptable. Please note that each
follow
| > up response may take approximately 2 business days as the support
| > professional working with you may need further investigation to reach
the
| > most efficient resolution. The offering is not appropriate for
situations
| > that require urgent, real-time or phone-based interactions or complex
| > project analysis and dump analysis issues. Issues of this nature are
best
| > handled working with a dedicated Microsoft Support Engineer by
contacting
| > Microsoft Customer Support Services (CSS) at
| >
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| > ==================================================
| > This posting is provided "AS IS" with no warranties, and confers no
| > rights.
| >
| > --------------------
| > | From: "TS" <[email protected]>
| > | Subject: overriding GridView.OnRowDeleting - can call registered event
| > handlers
| > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| > | Lines: 24
| > | X-Priority: 3
| > | X-MSMail-Priority: Normal
| > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | X-RFC2646: Format=Flowed; Original
| > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | Message-ID: <#[email protected]>
| > | Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | NNTP-Posting-Host: 168.38.106.193
| > | Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| > | Xref: TK2MSFTNGHUB02.phx.gbl
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| > | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > |
| > | Hello, I have a custom GridView and it overrides onRowDeleting and
| > doesn't
| > | call base.OnRowDeleting because the person implementing had
undesirable
| > | effects. the problem is I now when clients of this control register
| > their
| > | own event handlers for RowDeleting, it is never raised.
| > |
| > | I'm trying to add lines 1 - 5 to my overriden OnRowDeleting method but
| > can't
| > | because the key accessed in base.Events is EventRowDeleting, which is
an
| > | object that is a private constant that i dont have access to in my
| > derived
| > | control.
| > |
| > | How do I get a handle to any event handlers so I can call them???
| > |
| > | // this is the dissasembled method for GridView:
| > | protected virtual void OnRowDeleting(GridViewDeleteEventArgs e){
| > bool
| > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| > | GridViewDeleteEventHandler handler = (GridViewDeleteEventHandler)
| > | base.Events[EventRowDeleting];2 if (handler != null)3 {4
| > | handler(this, e);5 } else if (!isBoundUsingDataSourceID &&
| > !e.Cancel)
| > | { throw new
| > HttpException(SR.GetString("GridView_UnhandledEvent",
| > | new object[] { this.ID, "RowDeleting" })); }}
| > |
| > |
| > |
| > |
| > |
| >
|
|
|
 
T

TS

that did it, but for some reason the delegates for DataBinding was not
getting called, but that method does call base.DataBind, so make it
overridable is OK, though not sure why it wasnt getting called

Allen Chen said:
Hi,

Thanks for your clarification. To achieve your requirement I would suggest
you attach an event handler in the constructor method instead of
overriding
the OnRowDeleting method.

public class MyGridView : GridView
{

public MyGridView()
{
this.RowDeleting += new
GridViewDeleteEventHandler(MyGridView_RowDeleting);
}
void MyGridView_RowDeleting(object sender, GridViewDeleteEventArgs
e)
{
//Your code here
}
}

Please have a try and let me know if it's what you need.

Regards,
Allen Chen
Microsoft Online Support

--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Tue, 21 Oct 2008 11:38:04 -0500
| Lines: 136
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.193
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| So it looks like the "else if" section of the posted code below is
getting
| run, which throws an exception and this is why that base.OnRowDeleting
is
| commented out. Our custom OnRowDeleting does a lot of stuff in it that
is
| common to every grid. The only thing the base class does is call any
| registered delegates. So if we dont add event handler in aspx page for
| onRowDeleting, the base class will throw this error.
|
| We want to not have to attach custom event handlers in every aspx page
that
| uses the grid control and just let our custom gridView handle all the
| processing in all the grid events (onRowEditing, onRowUpdating,
| onRowDeleting, etc.), but I need to be able to support overriding this
| behavior sometimes by adding a custom event handler in my aspx page.
|
| Could I override the each Event Handler's add/remove properties so that
i
| can handle the Event[] collection myself and then i'll be able to call
the
| individually registered delegates?
| public event GridViewDeleteEventHandler RowDeleting
|
| {
|
| add
|
| {
|
| base.Events.AddHandler(EventRowDeleting, value);
|
| }
|
| remove
|
| {
|
| base.Events.RemoveHandler(EventRowDeleting, value);
|
| }
|
| }
|
|
| | > Hi,
| >
| > As you said, it's a private field so we cannot access it in the custom
| > GridView. I think we'd better focus on your following statement:
| >
| > I have a custom GridView and it overrides onRowDeleting and doesn't
| > call base.OnRowDeleting because the person implementing had
undesirable
| > effects.
| >
| > Could you tell me what're the undesirable effects and your requirement
as
| > well? I think if we can eliminate them this issue can be worked
around.
| >
| > Regards,
| > Allen Chen
| > Microsoft Online Support
| >
| > Delighting our customers is our #1 priority. We welcome your comments
and
| > suggestions about how we can improve the support we provide to you.
Please
| > feel free to let my manager know what you think of the level of
service
| > provided. You can send feedback directly to my manager at:
| > (e-mail address removed).
| >
| > ==================================================
| > Get notification to my posts through email? Please refer to
| >
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| >
| > Note: The MSDN Managed Newsgroup support offering is for non-urgent
issues
| > where an initial response from the community or a Microsoft Support
| > Engineer within 1 business day is acceptable. Please note that each
follow
| > up response may take approximately 2 business days as the support
| > professional working with you may need further investigation to reach
the
| > most efficient resolution. The offering is not appropriate for
situations
| > that require urgent, real-time or phone-based interactions or complex
| > project analysis and dump analysis issues. Issues of this nature are
best
| > handled working with a dedicated Microsoft Support Engineer by
contacting
| > Microsoft Customer Support Services (CSS) at
| >
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| > ==================================================
| > This posting is provided "AS IS" with no warranties, and confers no
| > rights.
| >
| > --------------------
| > | From: "TS" <[email protected]>
| > | Subject: overriding GridView.OnRowDeleting - can call registered
event
| > handlers
| > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| > | Lines: 24
| > | X-Priority: 3
| > | X-MSMail-Priority: Normal
| > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | X-RFC2646: Format=Flowed; Original
| > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | Message-ID: <#[email protected]>
| > | Newsgroups:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | NNTP-Posting-Host: 168.38.106.193
| > | Path:
TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| > | Xref: TK2MSFTNGHUB02.phx.gbl
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| > | X-Tomcat-NG:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > |
| > | Hello, I have a custom GridView and it overrides onRowDeleting and
| > doesn't
| > | call base.OnRowDeleting because the person implementing had
undesirable
| > | effects. the problem is I now when clients of this control register
| > their
| > | own event handlers for RowDeleting, it is never raised.
| > |
| > | I'm trying to add lines 1 - 5 to my overriden OnRowDeleting method
but
| > can't
| > | because the key accessed in base.Events is EventRowDeleting, which
is
an
| > | object that is a private constant that i dont have access to in my
| > derived
| > | control.
| > |
| > | How do I get a handle to any event handlers so I can call them???
| > |
| > | // this is the dissasembled method for GridView:
| > | protected virtual void OnRowDeleting(GridViewDeleteEventArgs e){
| > bool
| > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| > | GridViewDeleteEventHandler handler = (GridViewDeleteEventHandler)
| > | base.Events[EventRowDeleting];2 if (handler != null)3 {4
| > | handler(this, e);5 } else if (!isBoundUsingDataSourceID &&
| > !e.Cancel)
| > | { throw new
| > HttpException(SR.GetString("GridView_UnhandledEvent",
| > | new object[] { this.ID, "RowDeleting" })); }}
| > |
| > |
| > |
| > |
| > |
| >
|
|
|
 
A

Allen Chen [MSFT]

Hi,

Do you have any further questions? If you have please provide some code so
that I can test it on my side.

Regards,
Allen Chen
Microsoft Online Community Support

--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
<[email protected]>
<[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Wed, 22 Oct 2008 11:07:08 -0500
| Lines: 223
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.193
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1142
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| that did it, but for some reason the delegates for DataBinding was not
| getting called, but that method does call base.DataBind, so make it
| overridable is OK, though not sure why it wasnt getting called
|
| | > Hi,
| >
| > Thanks for your clarification. To achieve your requirement I would
suggest
| > you attach an event handler in the constructor method instead of
| > overriding
| > the OnRowDeleting method.
| >
| > public class MyGridView : GridView
| > {
| >
| > public MyGridView()
| > {
| > this.RowDeleting += new
| > GridViewDeleteEventHandler(MyGridView_RowDeleting);
| > }
| > void MyGridView_RowDeleting(object sender,
GridViewDeleteEventArgs
| > e)
| > {
| > //Your code here
| > }
| > }
| >
| > Please have a try and let me know if it's what you need.
| >
| > Regards,
| > Allen Chen
| > Microsoft Online Support
| >
| > --------------------
| > | From: "TS" <[email protected]>
| > | References: <#[email protected]>
| > <#[email protected]>
| > | Subject: Re: overriding GridView.OnRowDeleting - can call registered
| > event handlers
| > | Date: Tue, 21 Oct 2008 11:38:04 -0500
| > | Lines: 136
| > | X-Priority: 3
| > | X-MSMail-Priority: Normal
| > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | X-RFC2646: Format=Flowed; Original
| > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | Message-ID: <[email protected]>
| > | Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | NNTP-Posting-Host: 168.38.106.193
| > | Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| > | Xref: TK2MSFTNGHUB02.phx.gbl
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| > | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > |
| > | So it looks like the "else if" section of the posted code below is
| > getting
| > | run, which throws an exception and this is why that
base.OnRowDeleting
| > is
| > | commented out. Our custom OnRowDeleting does a lot of stuff in it
that
| > is
| > | common to every grid. The only thing the base class does is call any
| > | registered delegates. So if we dont add event handler in aspx page for
| > | onRowDeleting, the base class will throw this error.
| > |
| > | We want to not have to attach custom event handlers in every aspx page
| > that
| > | uses the grid control and just let our custom gridView handle all the
| > | processing in all the grid events (onRowEditing, onRowUpdating,
| > | onRowDeleting, etc.), but I need to be able to support overriding this
| > | behavior sometimes by adding a custom event handler in my aspx page.
| > |
| > | Could I override the each Event Handler's add/remove properties so
that
| > i
| > | can handle the Event[] collection myself and then i'll be able to call
| > the
| > | individually registered delegates?
| > | public event GridViewDeleteEventHandler RowDeleting
| > |
| > | {
| > |
| > | add
| > |
| > | {
| > |
| > | base.Events.AddHandler(EventRowDeleting, value);
| > |
| > | }
| > |
| > | remove
| > |
| > | {
| > |
| > | base.Events.RemoveHandler(EventRowDeleting, value);
| > |
| > | }
| > |
| > | }
| > |
| > |
| > | | > | > Hi,
| > | >
| > | > As you said, it's a private field so we cannot access it in the
custom
| > | > GridView. I think we'd better focus on your following statement:
| > | >
| > | > I have a custom GridView and it overrides onRowDeleting and doesn't
| > | > call base.OnRowDeleting because the person implementing had
| > undesirable
| > | > effects.
| > | >
| > | > Could you tell me what're the undesirable effects and your
requirement
| > as
| > | > well? I think if we can eliminate them this issue can be worked
| > around.
| > | >
| > | > Regards,
| > | > Allen Chen
| > | > Microsoft Online Support
| > | >
| > | > Delighting our customers is our #1 priority. We welcome your
comments
| > and
| > | > suggestions about how we can improve the support we provide to you.
| > Please
| > | > feel free to let my manager know what you think of the level of
| > service
| > | > provided. You can send feedback directly to my manager at:
| > | > (e-mail address removed).
| > | >
| > | > ==================================================
| > | > Get notification to my posts through email? Please refer to
| > | >
| >
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| > | >
| > | > Note: The MSDN Managed Newsgroup support offering is for non-urgent
| > issues
| > | > where an initial response from the community or a Microsoft Support
| > | > Engineer within 1 business day is acceptable. Please note that each
| > follow
| > | > up response may take approximately 2 business days as the support
| > | > professional working with you may need further investigation to
reach
| > the
| > | > most efficient resolution. The offering is not appropriate for
| > situations
| > | > that require urgent, real-time or phone-based interactions or
complex
| > | > project analysis and dump analysis issues. Issues of this nature are
| > best
| > | > handled working with a dedicated Microsoft Support Engineer by
| > contacting
| > | > Microsoft Customer Support Services (CSS) at
| > | >
| >
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| > | > ==================================================
| > | > This posting is provided "AS IS" with no warranties, and confers no
| > | > rights.
| > | >
| > | > --------------------
| > | > | From: "TS" <[email protected]>
| > | > | Subject: overriding GridView.OnRowDeleting - can call registered
| > event
| > | > handlers
| > | > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| > | > | Lines: 24
| > | > | X-Priority: 3
| > | > | X-MSMail-Priority: Normal
| > | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | > | X-RFC2646: Format=Flowed; Original
| > | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | > | Message-ID: <#[email protected]>
| > | > | Newsgroups:
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | > | NNTP-Posting-Host: 168.38.106.193
| > | > | Path:
| > TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| > | > | Xref: TK2MSFTNGHUB02.phx.gbl
| > | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| > | > | X-Tomcat-NG:
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | > |
| > | > | Hello, I have a custom GridView and it overrides onRowDeleting and
| > | > doesn't
| > | > | call base.OnRowDeleting because the person implementing had
| > undesirable
| > | > | effects. the problem is I now when clients of this control
register
| > | > their
| > | > | own event handlers for RowDeleting, it is never raised.
| > | > |
| > | > | I'm trying to add lines 1 - 5 to my overriden OnRowDeleting
method
| > but
| > | > can't
| > | > | because the key accessed in base.Events is EventRowDeleting,
which
| > is
| > an
| > | > | object that is a private constant that i dont have access to in my
| > | > derived
| > | > | control.
| > | > |
| > | > | How do I get a handle to any event handlers so I can call them???
| > | > |
| > | > | // this is the dissasembled method for GridView:
| > | > | protected virtual void OnRowDeleting(GridViewDeleteEventArgs e){
| > | > bool
| > | > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| > | > | GridViewDeleteEventHandler handler = (GridViewDeleteEventHandler)
| > | > | base.Events[EventRowDeleting];2 if (handler != null)3 {4
| > | > | handler(this, e);5 } else if (!isBoundUsingDataSourceID &&
| > | > !e.Cancel)
| > | > | { throw new
| > | > HttpException(SR.GetString("GridView_UnhandledEvent",
| > | > | new object[] { this.ID, "RowDeleting" })); }}
| > | > |
| > | > |
| > | > |
| > | > |
| > | > |
| > | >
| > |
| > |
| > |
| >
|
|
|
 
Ad

Advertisements

T

TS

thats all for now, thanks

Allen Chen said:
Hi,

Do you have any further questions? If you have please provide some code so
that I can test it on my side.

Regards,
Allen Chen
Microsoft Online Community Support

--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
<[email protected]>
<[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Wed, 22 Oct 2008 11:07:08 -0500
| Lines: 223
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.193
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1142
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| that did it, but for some reason the delegates for DataBinding was not
| getting called, but that method does call base.DataBind, so make it
| overridable is OK, though not sure why it wasnt getting called
|
| | > Hi,
| >
| > Thanks for your clarification. To achieve your requirement I would
suggest
| > you attach an event handler in the constructor method instead of
| > overriding
| > the OnRowDeleting method.
| >
| > public class MyGridView : GridView
| > {
| >
| > public MyGridView()
| > {
| > this.RowDeleting += new
| > GridViewDeleteEventHandler(MyGridView_RowDeleting);
| > }
| > void MyGridView_RowDeleting(object sender,
GridViewDeleteEventArgs
| > e)
| > {
| > //Your code here
| > }
| > }
| >
| > Please have a try and let me know if it's what you need.
| >
| > Regards,
| > Allen Chen
| > Microsoft Online Support
| >
| > --------------------
| > | From: "TS" <[email protected]>
| > | References: <#[email protected]>
| > <#[email protected]>
| > | Subject: Re: overriding GridView.OnRowDeleting - can call registered
| > event handlers
| > | Date: Tue, 21 Oct 2008 11:38:04 -0500
| > | Lines: 136
| > | X-Priority: 3
| > | X-MSMail-Priority: Normal
| > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | X-RFC2646: Format=Flowed; Original
| > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | Message-ID: <[email protected]>
| > | Newsgroups:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | NNTP-Posting-Host: 168.38.106.193
| > | Path:
TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| > | Xref: TK2MSFTNGHUB02.phx.gbl
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| > | X-Tomcat-NG:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > |
| > | So it looks like the "else if" section of the posted code below is
| > getting
| > | run, which throws an exception and this is why that
base.OnRowDeleting
| > is
| > | commented out. Our custom OnRowDeleting does a lot of stuff in it
that
| > is
| > | common to every grid. The only thing the base class does is call any
| > | registered delegates. So if we dont add event handler in aspx page
for
| > | onRowDeleting, the base class will throw this error.
| > |
| > | We want to not have to attach custom event handlers in every aspx
page
| > that
| > | uses the grid control and just let our custom gridView handle all
the
| > | processing in all the grid events (onRowEditing, onRowUpdating,
| > | onRowDeleting, etc.), but I need to be able to support overriding
this
| > | behavior sometimes by adding a custom event handler in my aspx page.
| > |
| > | Could I override the each Event Handler's add/remove properties so
that
| > i
| > | can handle the Event[] collection myself and then i'll be able to
call
| > the
| > | individually registered delegates?
| > | public event GridViewDeleteEventHandler RowDeleting
| > |
| > | {
| > |
| > | add
| > |
| > | {
| > |
| > | base.Events.AddHandler(EventRowDeleting, value);
| > |
| > | }
| > |
| > | remove
| > |
| > | {
| > |
| > | base.Events.RemoveHandler(EventRowDeleting, value);
| > |
| > | }
| > |
| > | }
| > |
| > |
| > | | > | > Hi,
| > | >
| > | > As you said, it's a private field so we cannot access it in the
custom
| > | > GridView. I think we'd better focus on your following statement:
| > | >
| > | > I have a custom GridView and it overrides onRowDeleting and
doesn't
| > | > call base.OnRowDeleting because the person implementing had
| > undesirable
| > | > effects.
| > | >
| > | > Could you tell me what're the undesirable effects and your
requirement
| > as
| > | > well? I think if we can eliminate them this issue can be worked
| > around.
| > | >
| > | > Regards,
| > | > Allen Chen
| > | > Microsoft Online Support
| > | >
| > | > Delighting our customers is our #1 priority. We welcome your
comments
| > and
| > | > suggestions about how we can improve the support we provide to
you.
| > Please
| > | > feel free to let my manager know what you think of the level of
| > service
| > | > provided. You can send feedback directly to my manager at:
| > | > (e-mail address removed).
| > | >
| > | > ==================================================
| > | > Get notification to my posts through email? Please refer to
| > | >
| >
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| > | >
| > | > Note: The MSDN Managed Newsgroup support offering is for
non-urgent
| > issues
| > | > where an initial response from the community or a Microsoft
Support
| > | > Engineer within 1 business day is acceptable. Please note that
each
| > follow
| > | > up response may take approximately 2 business days as the support
| > | > professional working with you may need further investigation to
reach
| > the
| > | > most efficient resolution. The offering is not appropriate for
| > situations
| > | > that require urgent, real-time or phone-based interactions or
complex
| > | > project analysis and dump analysis issues. Issues of this nature
are
| > best
| > | > handled working with a dedicated Microsoft Support Engineer by
| > contacting
| > | > Microsoft Customer Support Services (CSS) at
| > | >
| >
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| > | > ==================================================
| > | > This posting is provided "AS IS" with no warranties, and confers
no
| > | > rights.
| > | >
| > | > --------------------
| > | > | From: "TS" <[email protected]>
| > | > | Subject: overriding GridView.OnRowDeleting - can call registered
| > event
| > | > handlers
| > | > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| > | > | Lines: 24
| > | > | X-Priority: 3
| > | > | X-MSMail-Priority: Normal
| > | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | > | X-RFC2646: Format=Flowed; Original
| > | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | > | Message-ID: <#[email protected]>
| > | > | Newsgroups:
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | > | NNTP-Posting-Host: 168.38.106.193
| > | > | Path:
| > TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| > | > | Xref: TK2MSFTNGHUB02.phx.gbl
| > | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| > | > | X-Tomcat-NG:
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | > |
| > | > | Hello, I have a custom GridView and it overrides onRowDeleting
and
| > | > doesn't
| > | > | call base.OnRowDeleting because the person implementing had
| > undesirable
| > | > | effects. the problem is I now when clients of this control
register
| > | > their
| > | > | own event handlers for RowDeleting, it is never raised.
| > | > |
| > | > | I'm trying to add lines 1 - 5 to my overriden OnRowDeleting
method
| > but
| > | > can't
| > | > | because the key accessed in base.Events is EventRowDeleting,
which
| > is
| > an
| > | > | object that is a private constant that i dont have access to in
my
| > | > derived
| > | > | control.
| > | > |
| > | > | How do I get a handle to any event handlers so I can call
them???
| > | > |
| > | > | // this is the dissasembled method for GridView:
| > | > | protected virtual void OnRowDeleting(GridViewDeleteEventArgs e){
| > | > bool
| > | > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| > | > | GridViewDeleteEventHandler handler =
(GridViewDeleteEventHandler)
| > | > | base.Events[EventRowDeleting];2 if (handler != null)3 {4
| > | > | handler(this, e);5 } else if (!isBoundUsingDataSourceID
&&
| > | > !e.Cancel)
| > | > | { throw new
| > | > HttpException(SR.GetString("GridView_UnhandledEvent",
| > | > | new object[] { this.ID, "RowDeleting" })); }}
| > | > |
| > | > |
| > | > |
| > | > |
| > | > |
| > | >
| > |
| > |
| > |
| >
|
|
|
 
T

TS

hello, I have 2 new issues:

1. My control is overriding OnRowCreated and it calls base.OnRowCreated and
on my aspx.cs page i am attaching an event handler to this RowCreated but it
is not running. I also tried to add an event handler to RowDataBound and
calling base.OnRowDataBound and it doesnt get called in aspx.cs either.

What could be the cause of this? I dont understand since i'm calling base
implementation (which seeing the code thru reflector it calls any attached
handlers)

2. This is related somehow to first point. As stated in the first problem
you already resolved, i attached event handlers in my custom control instead
of overriding them and that caused my event handlers on aspx.cs page to be
called correctly for most of them. When i tried to attach event handler for
RowCreated in custom control, it is not called, but when I override
OnRowCreated it is called. Even when I attached event handler for RowCreated
in custom control AND aspx.cs page, neither were called. The grid events
that I am currently using successfully on aspx.cs are RowUpdating and
RowEditing, both of which are also attached event handlers in custom
control.

thanks

Allen Chen said:
Hi,

Do you have any further questions? If you have please provide some code so
that I can test it on my side.

Regards,
Allen Chen
Microsoft Online Community Support

--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
<[email protected]>
<[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Wed, 22 Oct 2008 11:07:08 -0500
| Lines: 223
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.193
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1142
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| that did it, but for some reason the delegates for DataBinding was not
| getting called, but that method does call base.DataBind, so make it
| overridable is OK, though not sure why it wasnt getting called
|
| | > Hi,
| >
| > Thanks for your clarification. To achieve your requirement I would
suggest
| > you attach an event handler in the constructor method instead of
| > overriding
| > the OnRowDeleting method.
| >
| > public class MyGridView : GridView
| > {
| >
| > public MyGridView()
| > {
| > this.RowDeleting += new
| > GridViewDeleteEventHandler(MyGridView_RowDeleting);
| > }
| > void MyGridView_RowDeleting(object sender,
GridViewDeleteEventArgs
| > e)
| > {
| > //Your code here
| > }
| > }
| >
| > Please have a try and let me know if it's what you need.
| >
| > Regards,
| > Allen Chen
| > Microsoft Online Support
| >
| > --------------------
| > | From: "TS" <[email protected]>
| > | References: <#[email protected]>
| > <#[email protected]>
| > | Subject: Re: overriding GridView.OnRowDeleting - can call registered
| > event handlers
| > | Date: Tue, 21 Oct 2008 11:38:04 -0500
| > | Lines: 136
| > | X-Priority: 3
| > | X-MSMail-Priority: Normal
| > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | X-RFC2646: Format=Flowed; Original
| > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | Message-ID: <[email protected]>
| > | Newsgroups:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | NNTP-Posting-Host: 168.38.106.193
| > | Path:
TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| > | Xref: TK2MSFTNGHUB02.phx.gbl
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| > | X-Tomcat-NG:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > |
| > | So it looks like the "else if" section of the posted code below is
| > getting
| > | run, which throws an exception and this is why that
base.OnRowDeleting
| > is
| > | commented out. Our custom OnRowDeleting does a lot of stuff in it
that
| > is
| > | common to every grid. The only thing the base class does is call any
| > | registered delegates. So if we dont add event handler in aspx page
for
| > | onRowDeleting, the base class will throw this error.
| > |
| > | We want to not have to attach custom event handlers in every aspx
page
| > that
| > | uses the grid control and just let our custom gridView handle all
the
| > | processing in all the grid events (onRowEditing, onRowUpdating,
| > | onRowDeleting, etc.), but I need to be able to support overriding
this
| > | behavior sometimes by adding a custom event handler in my aspx page.
| > |
| > | Could I override the each Event Handler's add/remove properties so
that
| > i
| > | can handle the Event[] collection myself and then i'll be able to
call
| > the
| > | individually registered delegates?
| > | public event GridViewDeleteEventHandler RowDeleting
| > |
| > | {
| > |
| > | add
| > |
| > | {
| > |
| > | base.Events.AddHandler(EventRowDeleting, value);
| > |
| > | }
| > |
| > | remove
| > |
| > | {
| > |
| > | base.Events.RemoveHandler(EventRowDeleting, value);
| > |
| > | }
| > |
| > | }
| > |
| > |
| > | | > | > Hi,
| > | >
| > | > As you said, it's a private field so we cannot access it in the
custom
| > | > GridView. I think we'd better focus on your following statement:
| > | >
| > | > I have a custom GridView and it overrides onRowDeleting and
doesn't
| > | > call base.OnRowDeleting because the person implementing had
| > undesirable
| > | > effects.
| > | >
| > | > Could you tell me what're the undesirable effects and your
requirement
| > as
| > | > well? I think if we can eliminate them this issue can be worked
| > around.
| > | >
| > | > Regards,
| > | > Allen Chen
| > | > Microsoft Online Support
| > | >
| > | > Delighting our customers is our #1 priority. We welcome your
comments
| > and
| > | > suggestions about how we can improve the support we provide to
you.
| > Please
| > | > feel free to let my manager know what you think of the level of
| > service
| > | > provided. You can send feedback directly to my manager at:
| > | > (e-mail address removed).
| > | >
| > | > ==================================================
| > | > Get notification to my posts through email? Please refer to
| > | >
| >
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| > | >
| > | > Note: The MSDN Managed Newsgroup support offering is for
non-urgent
| > issues
| > | > where an initial response from the community or a Microsoft
Support
| > | > Engineer within 1 business day is acceptable. Please note that
each
| > follow
| > | > up response may take approximately 2 business days as the support
| > | > professional working with you may need further investigation to
reach
| > the
| > | > most efficient resolution. The offering is not appropriate for
| > situations
| > | > that require urgent, real-time or phone-based interactions or
complex
| > | > project analysis and dump analysis issues. Issues of this nature
are
| > best
| > | > handled working with a dedicated Microsoft Support Engineer by
| > contacting
| > | > Microsoft Customer Support Services (CSS) at
| > | >
| >
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| > | > ==================================================
| > | > This posting is provided "AS IS" with no warranties, and confers
no
| > | > rights.
| > | >
| > | > --------------------
| > | > | From: "TS" <[email protected]>
| > | > | Subject: overriding GridView.OnRowDeleting - can call registered
| > event
| > | > handlers
| > | > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| > | > | Lines: 24
| > | > | X-Priority: 3
| > | > | X-MSMail-Priority: Normal
| > | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | > | X-RFC2646: Format=Flowed; Original
| > | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | > | Message-ID: <#[email protected]>
| > | > | Newsgroups:
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | > | NNTP-Posting-Host: 168.38.106.193
| > | > | Path:
| > TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| > | > | Xref: TK2MSFTNGHUB02.phx.gbl
| > | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| > | > | X-Tomcat-NG:
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | > |
| > | > | Hello, I have a custom GridView and it overrides onRowDeleting
and
| > | > doesn't
| > | > | call base.OnRowDeleting because the person implementing had
| > undesirable
| > | > | effects. the problem is I now when clients of this control
register
| > | > their
| > | > | own event handlers for RowDeleting, it is never raised.
| > | > |
| > | > | I'm trying to add lines 1 - 5 to my overriden OnRowDeleting
method
| > but
| > | > can't
| > | > | because the key accessed in base.Events is EventRowDeleting,
which
| > is
| > an
| > | > | object that is a private constant that i dont have access to in
my
| > | > derived
| > | > | control.
| > | > |
| > | > | How do I get a handle to any event handlers so I can call
them???
| > | > |
| > | > | // this is the dissasembled method for GridView:
| > | > | protected virtual void OnRowDeleting(GridViewDeleteEventArgs e){
| > | > bool
| > | > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| > | > | GridViewDeleteEventHandler handler =
(GridViewDeleteEventHandler)
| > | > | base.Events[EventRowDeleting];2 if (handler != null)3 {4
| > | > | handler(this, e);5 } else if (!isBoundUsingDataSourceID
&&
| > | > !e.Cancel)
| > | > | { throw new
| > | > HttpException(SR.GetString("GridView_UnhandledEvent",
| > | > | new object[] { this.ID, "RowDeleting" })); }}
| > | > |
| > | > |
| > | > |
| > | > |
| > | > |
| > | >
| > |
| > |
| > |
| >
|
|
|
 
T

TS

I see now that all the events get raised when I click one of the grid's
buttons to fire Edit, Update, etc. So on default data binding of the grid,
on just load of the page, the events are not getting raised. Sounds like
something is missing from the control's code:

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Collections.Generic;
using System.Web.UI.WebControls;
using System.Web.UI;
using System.Reflection;
using MyPrj.SNF.Model;
using MyPrj.SNF.Application;
using System.Data;
using System.Web;
/// <summary>
/// Summary description for EditableGrid
/// </summary>

namespace MyPrj.SNF.Web.Control
{

public class EditableGrid : System.Web.UI.WebControls.GridView
{
public EditableGrid()
{
//
// TODO: Add constructor logic here
//
ShowFooter = true;
ShowHeader = true;
ShowFooterWhenEmpty = true;
ShowHeaderWhenEmpty = true;
ShowGridViewEditButtons = true;
GridPostbackEvent = "GridReload";
EmptyDataText = "No Records Found";
EnableViewState = false;
SetupStyleAndBehaviour();
}

#region Events
#region protected override void OnLoad(EventArgs e)
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
#region Add Delegates for all grid events
// Add delegates instead of overriding for all the grid events that dont
need to call base's implementation, otherwise
// every aspx page would have to have a delegate for each grid event that
was supported for that grid on that page

// Note: do in OnLoad so that the individual aspx pages can also do this
in their OnLoad and have their events
// run first so that the BypassGridEvent flag can be set to true to
bypass execution here.
this.RowCommand += new
GridViewCommandEventHandler(EditableGrid_RowCommand);
this.RowEditing += new GridViewEditEventHandler(EditableGrid_RowEditing);
this.RowCancelingEdit += new
GridViewCancelEditEventHandler(EditableGrid_RowCancelingEdit);
this.RowUpdating += new
GridViewUpdateEventHandler(EditableGrid_RowUpdating);
this.RowDeleting += new
GridViewDeleteEventHandler(EditableGrid_RowDeleting);
this.Sorting += new GridViewSortEventHandler(EditableGrid_Sorting);
this.PageIndexChanged += new EventHandler(EditableGrid_PageIndexChanged);
#endregion
}
#endregion
#region protected override int CreateChildControls(IEnumerable dataSource,
bool dataBinding)
protected override int CreateChildControls(IEnumerable dataSource, bool
dataBinding)
{
int rows = base.CreateChildControls(dataSource, dataBinding);

// no data rows created, create empty table if enabled
if (rows == 0 && (ShowFooterWhenEmpty || ShowHeaderWhenEmpty))
{
// create the table
Table table = CreateChildTable();
Controls.Clear();
Controls.Add(table);
DataControlField[] fields;
if (AutoGenerateColumns)
{
PagedDataSource source = new PagedDataSource();
source.DataSource = dataSource;
ICollection autoGeneratedColumns = CreateColumns(source,
true);
fields = new
DataControlField[autoGeneratedColumns.Count];
autoGeneratedColumns.CopyTo(fields, 0);
}
else
{
fields = new DataControlField[Columns.Count];
Columns.CopyTo(fields, 0);
}

TableRowCollection newRows = table.Rows;
if (ShowHeaderWhenEmpty)
{
// create a new header row
_headerRow = CreateRow(-1, -1,
DataControlRowType.Header, DataControlRowState.Normal);
InitializeRow(_headerRow, fields, newRows);
}

//// create the empty row
GridViewRow emptyRow = new GridViewRow(-1, -1,
DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
TableCell cell = new TableCell();
cell.ColumnSpan = fields.Length;
cell.Width = Unit.Percentage(100);
//
if (EmptyDataTemplate != null)
{
EmptyDataTemplate.InstantiateIn(cell);
}
else if (!string.IsNullOrEmpty(EmptyDataText))
//else if (!string.IsNullOrEmpty(EmptyDataText) &&
MyPrj.SNF.Web.Utils.Utils.InReadMode())
{
cell.Controls.Add(new LiteralControl(EmptyDataText));
}
emptyRow.Cells.Add(cell);
GridViewRowEventArgs e = new GridViewRowEventArgs(emptyRow);
OnRowCreated(e);
newRows.Add(emptyRow);
emptyRow.DataBind();
OnRowDataBound(e);
emptyRow.DataItem = null;
if (ShowFooterWhenEmpty &&
!MyPrj.SNF.Web.Utils.Utils.InReadMode())
{
// create footer row
_footerRow = CreateRow(-1, -1,
DataControlRowType.Footer, DataControlRowState.Normal);
InitializeRow(_footerRow, fields, newRows);
}
}
return rows;
}
#endregion
#region protected override void Render()
protected override void Render(HtmlTextWriter writer)
{
if (DataSource != null && GridMode == GridViewMode.Editable)
{
IList listRows = DataSource as IList;
int rowIndex = 0;
string itemCountHiddenField = "<input type=\"hidden\"
name=\"" + this.PropertyName + "Count" + "\" id=\"" + this.PropertyName +
"Count" + "\" value=\"" + listRows.Count.ToString() + "\" />";
writer.WriteLine(itemCountHiddenField);
foreach (MyPrj.SNF.Model.IDomainObject domainObject in
listRows)
{
foreach (GridViewColumnMetaData columnMetaData in
MetaData.Columns)
{
object propValue =
Utils.Utils.GetPropertyValue(domainObject, columnMetaData.PropertyName);
string propertyValue = string.Empty;
if (propValue != null)
propertyValue = propValue.ToString();
// Replace line breaks with a single space
// Escape Double Quotes & backslashes so the value
can be put safely into the array and hidden fields
propertyValue = propertyValue.Replace("\r\n", "
").Replace(@"\", @"\\").Replace(@"""", "\\\"");


string hiddenFieldId = (PropertyName + "_" +
rowIndex + "_" + columnMetaData.PropertyName);
string hiddenFieldToRender = "<input type=\"hidden\"
name=\"" + hiddenFieldId + "\" id=\"" + hiddenFieldId + "\" value=\"" +
propertyValue + "\" />";
writer.WriteLine(hiddenFieldToRender);
}
rowIndex++;
}
}
base.Render(writer);
RenderHiddenFieldsForActions();
}
#endregion
#region protected override void LoadControlState()
/// <summary>
/// Manages the Sort information.
/// </summary>
/// <param name="savedState"></param>
protected override void LoadControlState(object savedState)
{
object[] states = (object[])savedState;
base.LoadControlState(states[0]);

CSSortExpression = (string)states[1];
CSSortDirection =
(MyPrj.SNF.Application.SortDirection)states[2];
}
#endregion
#region protected override object SaveControlState()
protected override object SaveControlState()
{
object[] states = new object[3];
states[0] = base.SaveControlState();

states[1] = CSSortExpression;
states[2] = CSSortDirection;

return states;
}
#endregion
protected override void OnDataBinding(EventArgs e)
{
DataSource = Utils.Utils.GetPropertyValue(PropertyName) as
IList;
addColumns();
base.OnDataBinding(e);
}
protected override void OnRowCreated(GridViewRowEventArgs e)
{
if (e.Row.DataItem != null && e.Row.RowType ==
DataControlRowType.DataRow)
{
object isRowDeleted =
Utils.Utils.GetPropertyValue((IDomainObject)e.Row.DataItem,
"HasBeenDeleted");
addRowEvents(e.Row, (bool)isRowDeleted);
}

#region Add footer row events
if (MetaData != null && EditIndex < 0 && e.Row.RowType ==
DataControlRowType.Footer)
{
foreach (GridViewActionInfo actionInfo in MetaData.Actions)
{
System.Web.UI.WebControls.LinkButton lb = new
System.Web.UI.WebControls.LinkButton();
if (actionInfo.EventLocation ==
GridViewActionInfo.EventLocationCode.FooterRow)
{
lb.Text = actionInfo.DisplayName;
lb.ID = "lnk" + this.ID + actionInfo.EventName;
lb.CommandName = actionInfo.CommandType.ToString();
lb.CausesValidation = actionInfo.CausesValidation;
lb.ValidationGroup = this.ID;
lb.OnClientClick = getGridEventOnClickString(e.Row, lb,
true, 0, actionInfo.CausesValidation, actionInfo.ClientSideEventHandlerName,
actionInfo.ActionParameters);
lb.Attributes.Add("href", "#");
addActionCell(e.Row, lb);
TableHeaderCell c = new TableHeaderCell();
c.Text = "";
HeaderRow.Cells.Add(c);
}
}
}
#endregion

base.OnRowCreated(e);
}
#region Delegated Events

#region void EditableGrid_RowEditing(object sender, GridViewEditEventArgs
e)
void EditableGrid_RowEditing(object sender, GridViewEditEventArgs e)
{
if (BypassGridEvent)
return;

this.EditIndex = e.NewEditIndex;
this.DataBind();
}
#endregion
#region void EditableGrid_RowDeleting(object sender,
GridViewDeleteEventArgs e)
void EditableGrid_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
if (BypassGridEvent)
return;

this.EditIndex = -1;
Type domainObjectType = Type.GetType(DomainObjectName);
object objItems = Activator.CreateInstance(domainObjectType);
Array dataSourceItems = DataSource as Array;
objItems = dataSourceItems.GetValue(e.RowIndex);
Array updatedItems = getUpdatedItems((IList)DataSource, objItems,
domainObjectType, e.RowIndex, "HasBeenDeleted", true);
setPropertyArrayValue(updatedItems);
this.DataSource = updatedItems as IList;
this.DataBind();
}
#endregion
#region void EditableGrid_RowUpdating(object sender,
GridViewUpdateEventArgs e)
void EditableGrid_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
if (BypassGridEvent)
return;

this.EditIndex = -1;
Type domainObjectType = Type.GetType(DomainObjectName);
object objItems = Activator.CreateInstance(domainObjectType);
foreach (System.Web.UI.Control c in
this.Rows[e.RowIndex].Controls)
{
//First level is table cell level.. we need to go one more
level..
if (c is DataControlFieldCell && c.Controls.Count > 0)
{
System.Web.UI.Control ec = c.Controls[0] as
System.Web.UI.Control;
setEachControlValues(ec, objItems);
}
}

Array updatedItems = getUpdatedItems((IList)DataSource,
objItems, domainObjectType, e.RowIndex, "HasBeenEdited", true);
setPropertyArrayValue(updatedItems);
this.DataSource = updatedItems as IList;
this.DataBind();
}
#endregion
#region void EditableGrid_RowCommand(object sender,
GridViewCommandEventArgs e)
void EditableGrid_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (BypassGridEvent)
return;

#region -- insert new row code here

if (e.CommandName.Equals("Add"))
{
//Here we have to get each item value from the controls.
Type domainObjectType = Type.GetType(DomainObjectName);
object objItems =
Activator.CreateInstance(domainObjectType);
foreach (System.Web.UI.Control c in this.FooterRow.Controls)
{
//First level is table cell level.. we
//need to go one more level..
if (c.GetType().Name == "DataControlFieldCell" &&
c.Controls.Count > 0)
{
System.Web.UI.Control ec = c.Controls[0] as
System.Web.UI.Control;
setEachControlValues(ec, objItems);
}
}

Array addedItems = getAddedItems((IList)DataSource,
objItems);
setPropertyArrayValue(addedItems);
this.DataSource = addedItems as IList;
this.DataBind();
}

#endregion

#region -- restore rows here

if (e.CommandName.Equals("Restore"))
{
this.EditIndex = -1;
Type domainObjectType = Type.GetType(DomainObjectName);
object objItems =
Activator.CreateInstance(domainObjectType);
Array dataSourceItems = DataSource as Array;
objItems =
dataSourceItems.GetValue(Convert.ToInt32(e.CommandArgument));
Array updatedItems = getUpdatedItems((IList)DataSource,
objItems, domainObjectType, Convert.ToInt32(e.CommandArgument),
"HasBeenDeleted", false);
setPropertyArrayValue(updatedItems);
this.DataSource = updatedItems as IList;
this.DataBind();
}

#endregion
}
#endregion
#region void EditableGrid_RowCancelingEdit(object sender,
GridViewCancelEditEventArgs e)
void EditableGrid_RowCancelingEdit(object sender,
GridViewCancelEditEventArgs e)
{
if (BypassGridEvent)
return;

this.EditIndex = -1;
this.DataBind();
}
#endregion
#region void EditableGrid_Sorting(object sender,
GridViewSortEventArgs e)
void EditableGrid_Sorting(object sender, GridViewSortEventArgs e)
{
if (BypassGridEvent)
return;

MyPrj.SNF.Web.Controller.RequestContext CurrentRequestContext =
Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
MyPrj.SNF.Web.Controller.RequestContext;
MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData =
CurrentRequestContext.CurrentControllerData;

if (CSSortExpression !=
((GridViewSortEventArgs)e).SortExpression)
CSSortDirection =
MyPrj.SNF.Application.SortDirection.Ascending;
else
CSSortDirection = (CSSortDirection ==
MyPrj.SNF.Application.SortDirection.Descending) ?
MyPrj.SNF.Application.SortDirection.Ascending :
MyPrj.SNF.Application.SortDirection.Descending;

CSSortExpression = ((GridViewSortEventArgs)e).SortExpression;
Array.Sort(DataSource as Array, new
MyPrj.SNF.Application.ClassComparer(CSSortExpression, CSSortDirection));
this.DataBind();
}
#endregion
#region void EditableGrid_PageIndexChanged(object sender, EventArgs
e)
void EditableGrid_PageIndexChanged(object sender, EventArgs e)
{
if (BypassGridEvent)
return;

bool displayLastPage = false;
//try
//{
if (((GridViewPageEventArgs)e).NewPageIndex > -1)
PageIndex = ((GridViewPageEventArgs)e).NewPageIndex;
else
displayLastPage = true;
IList list = DataSource as IList;
if (displayLastPage)
PageIndex = (int)Math.Ceiling(((double)list.Count /
PageSize)) - 1;
this.DataBind();
//}
//catch (Exception expGeneral)
//{
// throw;
//}
}

#endregion

#endregion
#endregion

#region void addColumns()

private void addColumns()
{
if (MetaData == null)
MetaData = GridViewMetaData.GetGridViewMetaData(MetaDataId);
Columns.Clear();

#region - all the controls

foreach (GridViewColumnMetaData columnMetaData in
MetaData.Columns)
{

if (columnMetaData.IsDisplayed)
{
TemplateField columnField = new TemplateField();
columnField.HeaderText = columnMetaData.HeaderText;
if (columnMetaData.IsSortable)
columnField.SortExpression =
columnMetaData.SortPropertyName;
columnField.ItemStyle.HorizontalAlign =
columnMetaData.HorizontalAlign;
columnField.ItemStyle.Width = columnMetaData.Width;

if (GridMode == GridViewMode.Editable)
{
columnField.ItemTemplate = new
GridViewTemplate(ListItemType.Item, MetaData, columnMetaData, this.ID);
columnField.EditItemTemplate = new
GridViewTemplate(ListItemType.EditItem, MetaData, columnMetaData, this.ID);

if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
this.EditIndex < 0)
{
columnField.FooterTemplate = new
GridViewTemplate(ListItemType.Footer, MetaData, columnMetaData, this.ID);
}
}
//Add the newly created bound field to the GridView.
Columns.Add(columnField);
}
}

#endregion

#region ------- add check box to each row if render selection is
specified


if ((MetaData.ShowSelectionInReadMode &&
MyPrj.SNF.Web.Utils.Utils.InReadMode()) ||
(MetaData.ShowSelectionInEditableMode &&
!MyPrj.SNF.Web.Utils.Utils.InReadMode()))
{
GridViewColumnMetaData gvMetaData = new
GridViewColumnMetaData(MetaData.SelectionPropertyName, "Select", false);
gvMetaData.ColumnType = "DomainObjectSelection";
TemplateField selectionField = new TemplateField();
selectionField.ItemTemplate = new
GridViewTemplate(ListItemType.EditItem, MetaData, gvMetaData, this.ID);
Columns.Add(selectionField);
}

#endregion

}



#endregion

#region private string getControlIndex()
private string getControlIndex(bool isFooterRow, int dataRowIndex)
{
//This is not a real code......????
//what do i do if there is no option..
string controlIndex = "";
int startCount = 0;

if (isFooterRow)
{
startCount = 3;
if (Rows.Count > 1)
startCount = 3 + (Rows.Count - 1);

if (startCount < 10)
controlIndex = "$ctl0" + startCount.ToString() + "$";
else
controlIndex = "$ctl" + startCount.ToString() + "$";
}
else
{
startCount = 2 + dataRowIndex;
if (startCount < 10)
controlIndex = "$ctl0" + startCount.ToString() + "$";
else
controlIndex = "$ctl" + startCount.ToString() + "$";
}

return controlIndex;
}
#endregion

#region private void addRowEvents(GridViewRow gr)
private void addRowEvents(GridViewRow gr, bool isDeleted)
{

System.Web.UI.WebControls.LinkButton lb = new
System.Web.UI.WebControls.LinkButton();
if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
ShowGridViewEditButtons)
{

#region //first add the data row events

foreach (GridViewActionInfo actionInfo in MetaData.Actions)
{
if (actionInfo.EventLocation ==
GridViewActionInfo.EventLocationCode.DataRow)
{
lb = new System.Web.UI.WebControls.LinkButton();
lb.ID = "lnk" + this.ID + actionInfo.EventName;
lb.Text = actionInfo.DisplayName;
lb.CommandName = actionInfo.CommandType.ToString();
lb.ValidationGroup = this.ID;
lb.CausesValidation = actionInfo.CausesValidation;
lb.Attributes.Add("href", "#");
lb.OnClientClick = getGridEventOnClickString(gr, lb,
false, gr.RowIndex, actionInfo.CausesValidation,
actionInfo.ClientSideEventHandlerName, actionInfo.ActionParameters);


if (actionInfo.CommandType ==
GridViewActionInfo.CommandTypeCode.SNF)
lb.OnClientClick =
getSNFOnclickString(actionInfo, gr);
else if (isDeleted && actionInfo.CommandType ==
GridViewActionInfo.CommandTypeCode.Restore)
{
//If its deleted row then just show the restore
event and return
removeActionCell(gr);
//set the deleted row css class
gr.CssClass = RemovedItemCssClass;
lb.CommandArgument = gr.RowIndex.ToString();
addActionCell(gr, lb);
addEmptyCell(gr);
return;
}


bool addThis = false;
if (EditIndex == gr.RowIndex &&
(actionInfo.CommandType == GridViewActionInfo.CommandTypeCode.Update ||
actionInfo.CommandType ==
GridViewActionInfo.CommandTypeCode.Cancel))
addThis = true;
else if (EditIndex < 0 && EditIndex != gr.RowIndex
&& (actionInfo.CommandType != GridViewActionInfo.CommandTypeCode.Update &&
actionInfo.CommandType !=
GridViewActionInfo.CommandTypeCode.Cancel && actionInfo.CommandType !=
GridViewActionInfo.CommandTypeCode.Restore))
addThis = true;

if (addThis)
addActionCell(gr, lb);

}
}

#endregion


#region //Add header row for the event

TableHeaderCell c = new TableHeaderCell();
c.Text = "";
HeaderRow.Cells.Add(c);

#endregion

}
}
#endregion

#region protected void RenderHiddenFieldsForActions()
protected void RenderHiddenFieldsForActions()
{
if (MetaData == null || MetaData.Actions == null ||
MetaData.Actions.Count < 1 || DataSource == null ||
((IList)DataSource).Count == 0)
return;

Hashtable hiddenFieldIds = new Hashtable();
foreach (GridViewActionInfo actionInfo in MetaData.Actions)
{
if (actionInfo.ActionParameters != null)
{
foreach (string argumentName in
actionInfo.ActionParameters.AllKeys)
{
if
(!hiddenFieldIds.ContainsKey(actionInfo.ActionParameters[argumentName]))
hiddenFieldIds[actionInfo.ActionParameters[argumentName]]
= null;
}
}
}
foreach (string hiddenFieldId in hiddenFieldIds.Keys)
{
// Add the Hidden Field only if the page doesn't already
contain a control with same ID
if (!Utils.Utils.IsControlOnPage(Page, hiddenFieldId))
{
//For ajax postback we will have to register the hidden
fields
ScriptManager sm = ScriptManager.GetCurrent(Page);
if (sm != null && sm.IsInAsyncPostBack)
System.Web.UI.ScriptManager.RegisterHiddenField(this,
hiddenFieldId, string.Empty);
else
Page.ClientScript.RegisterHiddenField(hiddenFieldId,
string.Empty);
}
}
}
#endregion

#region private string getSNFOnclickString(GridViewActionInfo
actionInfo,GridViewRow gr)
private string getSNFOnclickString(GridViewActionInfo actionInfo,
GridViewRow gr)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
if (actionInfo.ActionParameters != null &&
actionInfo.ActionParameters.Count > 0)
{
Type gridType = gr.DataItem.GetType();
List<string> parameters = new List<string>();
foreach (string propertyName in actionInfo.ActionParameters.AllKeys)
{
if (actionInfo.ActionParameters[propertyName] != null)
{
string controlId =
actionInfo.ActionParameters[propertyName];
object propertyValue =
gridType.GetProperty(propertyName).GetValue(gr.DataItem, null);
if (PropertyUtilities.IsNullValue(propertyValue))
propertyValue = string.Empty;

parameters.Add(controlId + "~" + propertyValue);
}
}
object[] args = new object[] { "this", actionInfo.EventName,
actionInfo.ClientSideEventHandlerName, string.Join("-",
parameters.ToArray()), gr.RowIndex };
return
string.Format("processGridViewEvent(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\")",
args);
}
return string.Empty;
}
#endregion

#region private string getGridEventOnClickString()
private string getGridEventOnClickString(GridViewRow gridRow,
System.Web.UI.WebControls.LinkButton lb, bool isFooterRow, int dataRowIndex,
bool causeValidation, string clientSideEventHandlerName, NameValueCollection
actionParameters)
{
string validationGroup = "donotValidate";
if (causeValidation)
validationGroup = ID;

string uniqId = this.UniqueID + getControlIndex(isFooterRow,
dataRowIndex) + lb.UniqueID;
if (!string.IsNullOrEmpty(clientSideEventHandlerName))
{
List<string> parameters = new List<string>();
parameters.Add("''");
if (actionParameters != null && actionParameters.Count > 0)
{
parameters.Clear();
Type gridType = gridRow.DataItem.GetType();
foreach (string propertyName in actionParameters.AllKeys)
{
if (actionParameters[propertyName] != null)
{
string controlId = actionParameters[propertyName];
object propertyValue =
gridType.GetProperty(propertyName).GetValue(gridRow.DataItem, null);
if (PropertyUtilities.IsNullValue(propertyValue))
propertyValue = string.Empty;
parameters.Add(controlId + "~" + propertyValue);
}
}
}

return string.Format("return
handleThenFireButtonEvent(\"{0}\",\"{1}\",\"{2}\",{3},\"{4}\",\"{5}\",\"{6}\",\"{7}\",\"{8}\")",
"this", GridPostbackEvent, clientSideEventHandlerName, "true",
string.Join("-", parameters.ToArray()), validationGroup, uniqId,
lb.CommandArgument, UpdatePanelId);
}
object[] args = new object[] { };
return string.Format("return
validateAndFireButtonEventGroup(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\",\"{5}\")",
"this", GridPostbackEvent, validationGroup, uniqId, lb.CommandArgument,
UpdatePanelId);
}
#endregion

#region private TableRow addActionCell()
private void addActionCell(GridViewRow gr,
System.Web.UI.WebControls.LinkButton lb)
{
System.Web.UI.WebControls.TableCell tc = new TableCell();
tc.Controls.Add(lb);
((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
}
#endregion

#region private TableRow addEmptyCell()
private void addEmptyCell(GridViewRow gr)
{
System.Web.UI.WebControls.TableCell tc = new TableCell();
tc.Text = "&nbsp;&nbsp;";
((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
}
#endregion

#region private void removeActionCell()
private void removeActionCell(GridViewRow gr)
{
TableCell[] tmpcell = new TableCell[gr.Cells.Count];
gr.Cells.CopyTo(tmpcell, 0);
foreach (TableCell c in tmpcell)
{
System.Web.UI.Control ctrl = new System.Web.UI.Control();
if (c.Controls.Count > 0)
ctrl = c.Controls[0];
if (ctrl != null && ctrl.GetType().Name == "LinkButton")
gr.Cells.Remove(c);
}

}
#endregion

#region private void setEachControlValues()
private void setEachControlValues(System.Web.UI.Control ec, object
objItems)
{
switch (ec.GetType().Name)
{
case "TextBox":
TextBox ctrlText = (TextBox)ec;
setControlValue(ctrlText.ID, ctrlText.Text, objItems);
break;
case "HiddenField":
HiddenField ctrl = (HiddenField )ec;
setControlValue(ctrl.ID, ctrl.Value, objItems);
break;
case "DateBox":
DateBox ctrlDB = (DateBox)ec;
setControlValue(ctrlDB.ID, ctrlDB.Text, objItems);
break;
case "DateTimeBox":
DateTimeBox ctrlDTB = (DateTimeBox)ec;
setControlValue(ctrlDTB.ID, ctrlDTB.Text, objItems);
break;
case "CheckBox":
CheckBox ctrlCheck = (CheckBox)ec;
string valueToSet = "N";
if (ctrlCheck.Checked)
valueToSet = "Y";
setControlValue(ctrlCheck.ID, valueToSet, objItems);
break;
case "DropDownList":
DropDownList ctrldrp = (DropDownList)ec;
setControlValue(ctrldrp.ID, ctrldrp.SelectedValue,
objItems);
break;
//also needs to set the ctrldrp.Text to the label control
//in the Items templates
case "RadioButtonList":
RadioButtonList ctrlRdo = (RadioButtonList)ec;
setControlValue(ctrlRdo.ID, ctrlRdo.SelectedValue,
objItems);
break;
case "Label":
Label ctrlLabel = (Label)ec;
setControlValue(ctrlLabel.ID, ctrlLabel.Text, objItems);
break;
}

}

#endregion

#region public GridViewMetaData MetaData
private GridViewMetaData _MetaData;
public GridViewMetaData MetaData
{
get { return _MetaData; }
set { _MetaData = value; }
}
#endregion

#region public string DomainObjectName
private string _domainObjectName;
public string DomainObjectName
{
get { return _domainObjectName; }
set { _domainObjectName = value; }
}
#endregion

#region public string DomainObjectListKey
private string _DomainObjectListKey;
public string DomainObjectListKey
{
get { return _DomainObjectListKey; }
set { _DomainObjectListKey = value; }
}
#endregion

#region public string MetaDataId
private string _MetaDataId;
public string MetaDataId
{
get { return _MetaDataId; }
set { _MetaDataId = value; }
}
#endregion

#region public string GridPostbackEvent
private string _GridPostbackEvent;
public string GridPostbackEvent
{
get { return _GridPostbackEvent; }
set { _GridPostbackEvent = value; }
}
#endregion

#region public bool BypassGridEvent
private bool _BypassGridEvent = false;
public bool BypassGridEvent
{
get { return _BypassGridEvent; }
set { _BypassGridEvent = value; }
}
#endregion

#region public bool ShowGridViewEditButtons
private bool _ShowGridViewEditButtons;
public bool ShowGridViewEditButtons
{
get { return _ShowGridViewEditButtons; }
set { _ShowGridViewEditButtons = value; }
}
#endregion

#region public string PropertyName
private string _PropertyName = string.Empty;
public string PropertyName
{
get { return _PropertyName; }
set { _PropertyName = value; }
}
#endregion

#region private Array getAddedItems()
private Array getAddedItems(IList oldList, object addedItems)
{
MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData =
Utils.Utils.GetCurrentControllerData();
int arrayLength = 1;
if (oldList != null && oldList.Count > 0)
arrayLength = oldList.Count + 1;
Array arrayItems = Array.CreateInstance(addedItems.GetType(),
arrayLength);
int i = 0;
if (oldList != null && oldList.Count > 0)
{
foreach (IDomainObject dm in oldList)
{
arrayItems.SetValue(dm, i);
i++;
}
}
arrayItems.SetValue(addedItems, i);
return arrayItems;
}
#endregion

#region private Array getUpdatedItems()
private Array getUpdatedItems(IList oldList, object updatedItems,
Type domainObjectType, int rowIndex, string propertyToUpdate, bool value)
{
//Also set the HasBeenEdited/HasBeenDeleted field with the value
true/false..
setControlValue(propertyToUpdate, value, updatedItems);
MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData =
Utils.Utils.GetCurrentControllerData();
Array arrayItems = Array.CreateInstance(domainObjectType,
oldList.Count);
int i = 0;
foreach (IDomainObject dm in oldList)
{
if (i == rowIndex)//if the row index match the current object then
replace the displayed column's values with the updated one
{
foreach (GridViewColumnMetaData columnMetaData in MetaData.Columns)
{
if (columnMetaData.IsDisplayed)
{
PropertyUtilities.SetValue(dm, columnMetaData.PropertyName,
PropertyUtilities.GetValue((IDomainObject)updatedItems,
columnMetaData.PropertyName));
}
}
}
// also set hasbeenEdited/hasbeenDeleted with true/false
setControlValue(propertyToUpdate, value, dm);
arrayItems.SetValue(dm, i);
i++;
}
return arrayItems;
}
#endregion

#region private Array getRemovedItems()
private Array getRemovedItems(IList oldList, object removedItems,
int rowIndex)
{
MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData =
Utils.Utils.GetCurrentControllerData();
Array arrayItemsToCopy =
Array.CreateInstance(removedItems.GetType(), oldList.Count);
Array arrayItems = Array.CreateInstance(removedItems.GetType(),
oldList.Count - 1);
int i = 0;
foreach (IDomainObject dm in oldList)
{
if (i != rowIndex)//if the row index match the current
object then remove it(do not add to list)
arrayItemsToCopy.SetValue(dm, i);
i++;
}

int newArrayCount = 0;
for (int j = 0; j < arrayItemsToCopy.Length; j++)
{
if (arrayItemsToCopy.GetValue(j) != null)
{
arrayItems.SetValue(arrayItemsToCopy.GetValue(j),
newArrayCount);
newArrayCount++;
}
}

return arrayItems;
}
#endregion

#region private void setControlValue()
private void setControlValue(string propertyName, object value,
object dObject)
{
PropertyInfo pi = null;
pi = dObject.GetType().GetProperty(propertyName);
SNF.Model.PropertyUtilities.SetValue((IDomainObject)dObject, pi,
value);

}
#endregion

#region private void setPropertyArrayValue()
private void setPropertyArrayValue(Array arrayItems)
{

MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData =
Utils.Utils.GetCurrentControllerData();
IDomainObject domainObject = CurrentControllerData.DomainObject;
PropertyInfo pi =
domainObject.GetType().GetProperty(PropertyName);
pi.SetValue(domainObject, arrayItems, null);
}
#endregion

#region private void ProcessControllerEvent()
private void ProcessControllerEvent(string eventName)
{
// Process the current event

MyPrj.SNF.Web.Controller.RequestContext CurrentRequestContext =
Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
MyPrj.SNF.Web.Controller.RequestContext;
MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData =
CurrentRequestContext.CurrentControllerData;
CurrentControllerData.EventName = eventName;

MyPrj.SNF.Web.Controller.ProcessResult pr =
MyPrj.SNF.Web.Controller.EventProcessor.ProcessEvent(
CurrentRequestContext, CurrentControllerData.StateId,
CurrentControllerData.EventName);

CurrentControllerData.EventName = pr.EventName; // Capture the
EventName from the result;
}
#endregion

#region private void addAjaxSupport()
private void addAjaxSupport(bool add)
{
ScriptManager
sm = ScriptManager.GetCurrent(Page);
if (sm == null)
throw new HttpException("A ScriptManager control must exist
on the current page.");
UpdatePanel updatePanel = new UpdatePanel();
updatePanel.UpdateMode = UpdatePanelUpdateMode.Conditional;
updatePanel.ID = "updatePanel" + this.ID;
updatePanel.ContentTemplateContainer.Controls.Add(this);
this.Controls.Add(updatePanel);
}
#endregion

#region -- section to show/hide empty header and footer rows

private GridViewRow _headerRow;
private GridViewRow _footerRow;

private bool _showHeaderWhenEmpty;
private bool _showFooterWhenEmpty;

public bool ShowHeaderWhenEmpty
{
get { return _showHeaderWhenEmpty; }
set { _showHeaderWhenEmpty = value; }
}

public bool ShowFooterWhenEmpty
{
get { return _showFooterWhenEmpty; }
set { _showFooterWhenEmpty = value; }
}

public override GridViewRow HeaderRow
{
get { return base.HeaderRow ?? _headerRow; }
}

public override GridViewRow FooterRow
{
get { return base.FooterRow ?? _footerRow; }
}

private void InitializeRow(GridViewRow row, DataControlField[]
fields, TableRowCollection newRows)
{
GridViewRowEventArgs e = new GridViewRowEventArgs(row);
InitializeRow(row, fields);
OnRowCreated(e);
newRows.Add(row);
row.DataBind();
OnRowDataBound(e);
row.DataItem = null;
}

#endregion

#region protected void SetupStyleAndBehaviour ()
protected virtual void SetupStyleAndBehaviour()
{
EnableViewState = false;
AutoGenerateColumns = false;

AllowSorting = true;
AllowPaging = true;
EnableSortingAndPagingCallbacks = false;
AutoGenerateSelectButton = false;
AutoGenerateDeleteButton = false;
AutoGenerateEditButton = false;

ShowHeader = true;
ShowFooter = true;
EmptyDataText = "No records found";

CssClass = "grid";
CellPadding = 3;
CellSpacing = 0;
GridLines = GridLines.Horizontal;

PageSize = 20;
PagerStyle.CssClass = "gridPager";
PagerSettings.FirstPageText = "<<";
PagerSettings.PreviousPageText = "<";
PagerSettings.NextPageText = ">";
PagerSettings.LastPageText = ">>";
PagerSettings.PageButtonCount = 10;
PagerSettings.Mode = PagerButtons.NumericFirstLast;

RowStyle.CssClass = "gridRow";
SelectedRowStyle.CssClass = "gridSelectedRow";
HeaderStyle.CssClass = "gridViewHeader";
FooterStyle.CssClass = "gridfooter";
AlternatingRowStyle.CssClass = "gridAlternatingRow";
RemovedItemCssClass = "gridDeletedRow";
}
#endregion

#region public GridViewMode GridMode
private GridViewMode _GridMode = GridViewMode.Editable;
/// <summary>
///
/// </summary>
public GridViewMode GridMode
{
get { return _GridMode; }
set { _GridMode = value; }
}
#endregion

#region Custom Management of SortExpression & SortDirection

#region public string CSSortExpression
private string _CSSortExpression;
public string CSSortExpression
{
get { return _CSSortExpression; }
set { _CSSortExpression = value; }
}
#endregion

#region public SortDirection CSSortDirection
private MyPrj.SNF.Application.SortDirection _CSSortDirection;
public MyPrj.SNF.Application.SortDirection CSSortDirection
{
get { return _CSSortDirection; }
set { _CSSortDirection = value; }
}
#endregion

#endregion Custom Management of SortExpression & SortDirection

#region public string RemovedItemCssClass
private string _RemovedItemCssClass;
public string RemovedItemCssClass
{
get { return _RemovedItemCssClass; }
set { _RemovedItemCssClass = value; }
}
#endregion

#region public string UpdatePanelId
private string _UpdatePanelId;
public string UpdatePanelId
{
get { return _UpdatePanelId; }
set { _UpdatePanelId = value; }
}
#endregion
}
}



TS said:
hello, I have 2 new issues:

1. My control is overriding OnRowCreated and it calls base.OnRowCreated
and on my aspx.cs page i am attaching an event handler to this RowCreated
but it is not running. I also tried to add an event handler to
RowDataBound and calling base.OnRowDataBound and it doesnt get called in
aspx.cs either.

What could be the cause of this? I dont understand since i'm calling base
implementation (which seeing the code thru reflector it calls any attached
handlers)

2. This is related somehow to first point. As stated in the first problem
you already resolved, i attached event handlers in my custom control
instead of overriding them and that caused my event handlers on aspx.cs
page to be called correctly for most of them. When i tried to attach event
handler for RowCreated in custom control, it is not called, but when I
override OnRowCreated it is called. Even when I attached event handler for
RowCreated in custom control AND aspx.cs page, neither were called. The
grid events that I am currently using successfully on aspx.cs are
RowUpdating and RowEditing, both of which are also attached event handlers
in custom control.

thanks

Allen Chen said:
Hi,

Do you have any further questions? If you have please provide some code
so
that I can test it on my side.

Regards,
Allen Chen
Microsoft Online Community Support

--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
<[email protected]>
<[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Wed, 22 Oct 2008 11:07:08 -0500
| Lines: 223
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Original
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.193
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1142
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| that did it, but for some reason the delegates for DataBinding was not
| getting called, but that method does call base.DataBind, so make it
| overridable is OK, though not sure why it wasnt getting called
|
| | > Hi,
| >
| > Thanks for your clarification. To achieve your requirement I would
suggest
| > you attach an event handler in the constructor method instead of
| > overriding
| > the OnRowDeleting method.
| >
| > public class MyGridView : GridView
| > {
| >
| > public MyGridView()
| > {
| > this.RowDeleting += new
| > GridViewDeleteEventHandler(MyGridView_RowDeleting);
| > }
| > void MyGridView_RowDeleting(object sender,
GridViewDeleteEventArgs
| > e)
| > {
| > //Your code here
| > }
| > }
| >
| > Please have a try and let me know if it's what you need.
| >
| > Regards,
| > Allen Chen
| > Microsoft Online Support
| >
| > --------------------
| > | From: "TS" <[email protected]>
| > | References: <#[email protected]>
| > <#[email protected]>
| > | Subject: Re: overriding GridView.OnRowDeleting - can call
registered
| > event handlers
| > | Date: Tue, 21 Oct 2008 11:38:04 -0500
| > | Lines: 136
| > | X-Priority: 3
| > | X-MSMail-Priority: Normal
| > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | X-RFC2646: Format=Flowed; Original
| > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | Message-ID: <[email protected]>
| > | Newsgroups:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | NNTP-Posting-Host: 168.38.106.193
| > | Path:
TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| > | Xref: TK2MSFTNGHUB02.phx.gbl
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| > | X-Tomcat-NG:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > |
| > | So it looks like the "else if" section of the posted code below is
| > getting
| > | run, which throws an exception and this is why that
base.OnRowDeleting
| > is
| > | commented out. Our custom OnRowDeleting does a lot of stuff in it
that
| > is
| > | common to every grid. The only thing the base class does is call
any
| > | registered delegates. So if we dont add event handler in aspx page
for
| > | onRowDeleting, the base class will throw this error.
| > |
| > | We want to not have to attach custom event handlers in every aspx
page
| > that
| > | uses the grid control and just let our custom gridView handle all
the
| > | processing in all the grid events (onRowEditing, onRowUpdating,
| > | onRowDeleting, etc.), but I need to be able to support overriding
this
| > | behavior sometimes by adding a custom event handler in my aspx
page.
| > |
| > | Could I override the each Event Handler's add/remove properties so
that
| > i
| > | can handle the Event[] collection myself and then i'll be able to
call
| > the
| > | individually registered delegates?
| > | public event GridViewDeleteEventHandler RowDeleting
| > |
| > | {
| > |
| > | add
| > |
| > | {
| > |
| > | base.Events.AddHandler(EventRowDeleting, value);
| > |
| > | }
| > |
| > | remove
| > |
| > | {
| > |
| > | base.Events.RemoveHandler(EventRowDeleting, value);
| > |
| > | }
| > |
| > | }
| > |
| > |
message
| > | | > | > Hi,
| > | >
| > | > As you said, it's a private field so we cannot access it in the
custom
| > | > GridView. I think we'd better focus on your following statement:
| > | >
| > | > I have a custom GridView and it overrides onRowDeleting and
doesn't
| > | > call base.OnRowDeleting because the person implementing had
| > undesirable
| > | > effects.
| > | >
| > | > Could you tell me what're the undesirable effects and your
requirement
| > as
| > | > well? I think if we can eliminate them this issue can be worked
| > around.
| > | >
| > | > Regards,
| > | > Allen Chen
| > | > Microsoft Online Support
| > | >
| > | > Delighting our customers is our #1 priority. We welcome your
comments
| > and
| > | > suggestions about how we can improve the support we provide to
you.
| > Please
| > | > feel free to let my manager know what you think of the level of
| > service
| > | > provided. You can send feedback directly to my manager at:
| > | > (e-mail address removed).
| > | >
| > | > ==================================================
| > | > Get notification to my posts through email? Please refer to
| > | >
| >
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| > | >
| > | > Note: The MSDN Managed Newsgroup support offering is for
non-urgent
| > issues
| > | > where an initial response from the community or a Microsoft
Support
| > | > Engineer within 1 business day is acceptable. Please note that
each
| > follow
| > | > up response may take approximately 2 business days as the support
| > | > professional working with you may need further investigation to
reach
| > the
| > | > most efficient resolution. The offering is not appropriate for
| > situations
| > | > that require urgent, real-time or phone-based interactions or
complex
| > | > project analysis and dump analysis issues. Issues of this nature
are
| > best
| > | > handled working with a dedicated Microsoft Support Engineer by
| > contacting
| > | > Microsoft Customer Support Services (CSS) at
| > | >
| >
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| > | > ==================================================
| > | > This posting is provided "AS IS" with no warranties, and confers
no
| > | > rights.
| > | >
| > | > --------------------
| > | > | From: "TS" <[email protected]>
| > | > | Subject: overriding GridView.OnRowDeleting - can call
registered
| > event
| > | > handlers
| > | > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| > | > | Lines: 24
| > | > | X-Priority: 3
| > | > | X-MSMail-Priority: Normal
| > | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| > | > | X-RFC2646: Format=Flowed; Original
| > | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| > | > | Message-ID: <#[email protected]>
| > | > | Newsgroups:
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | > | NNTP-Posting-Host: 168.38.106.193
| > | > | Path:
| > TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| > | > | Xref: TK2MSFTNGHUB02.phx.gbl
| > | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| > | > | X-Tomcat-NG:
| > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| > | > |
| > | > | Hello, I have a custom GridView and it overrides onRowDeleting
and
| > | > doesn't
| > | > | call base.OnRowDeleting because the person implementing had
| > undesirable
| > | > | effects. the problem is I now when clients of this control
register
| > | > their
| > | > | own event handlers for RowDeleting, it is never raised.
| > | > |
| > | > | I'm trying to add lines 1 - 5 to my overriden OnRowDeleting
method
| > but
| > | > can't
| > | > | because the key accessed in base.Events is EventRowDeleting,
which
| > is
| > an
| > | > | object that is a private constant that i dont have access to in
my
| > | > derived
| > | > | control.
| > | > |
| > | > | How do I get a handle to any event handlers so I can call
them???
| > | > |
| > | > | // this is the dissasembled method for GridView:
| > | > | protected virtual void OnRowDeleting(GridViewDeleteEventArgs
e){
| > | > bool
| > | > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| > | > | GridViewDeleteEventHandler handler =
(GridViewDeleteEventHandler)
| > | > | base.Events[EventRowDeleting];2 if (handler != null)3 {4
| > | > | handler(this, e);5 } else if (!isBoundUsingDataSourceID
&&
| > | > !e.Cancel)
| > | > | { throw new
| > | > HttpException(SR.GetString("GridView_UnhandledEvent",
| > | > | new object[] { this.ID, "RowDeleting" })); }}
| > | > |
| > | > |
| > | > |
| > | > |
| > | > |
| > | >
| > |
| > |
| > |
| >
|
|
|
 
A

Allen Chen [MSFT]

Hi,

Thanks for your code. However, it looks like your code includes some other
code that is not provided yet so it's very difficult to reproduce it on my
side. Could you create a simple custom GridView control with some concise
code and tell me how to reproduce this issue in detail? You can send a demo
project to me via email. My email is (e-mail address removed).

Regards,
Allen Chen
Microsoft Online Support

--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Wed, 29 Oct 2008 11:08:23 -0500
| Lines: 1559
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Response
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.113
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP05.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1147
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| I see now that all the events get raised when I click one of the grid's
| buttons to fire Edit, Update, etc. So on default data binding of the
grid,
| on just load of the page, the events are not getting raised. Sounds like
| something is missing from the control's code:
|
| using System;
| using System.Collections;
| using System.Collections.Specialized;
| using System.Collections.Generic;
| using System.Web.UI.WebControls;
| using System.Web.UI;
| using System.Reflection;
| using MyPrj.SNF.Model;
| using MyPrj.SNF.Application;
| using System.Data;
| using System.Web;
| /// <summary>
| /// Summary description for EditableGrid
| /// </summary>
|
| namespace MyPrj.SNF.Web.Control
| {
|
| public class EditableGrid : System.Web.UI.WebControls.GridView
| {
| public EditableGrid()
| {
| //
| // TODO: Add constructor logic here
| //
| ShowFooter = true;
| ShowHeader = true;
| ShowFooterWhenEmpty = true;
| ShowHeaderWhenEmpty = true;
| ShowGridViewEditButtons = true;
| GridPostbackEvent = "GridReload";
| EmptyDataText = "No Records Found";
| EnableViewState = false;
| SetupStyleAndBehaviour();
| }
|
| #region Events
| #region protected override void OnLoad(EventArgs e)
| protected override void OnLoad(EventArgs e)
| {
| base.OnLoad(e);
| #region Add Delegates for all grid events
| // Add delegates instead of overriding for all the grid events that
dont
| need to call base's implementation, otherwise
| // every aspx page would have to have a delegate for each grid event
that
| was supported for that grid on that page
|
| // Note: do in OnLoad so that the individual aspx pages can also do
this
| in their OnLoad and have their events
| // run first so that the BypassGridEvent flag can be set to true to
| bypass execution here.
| this.RowCommand += new
| GridViewCommandEventHandler(EditableGrid_RowCommand);
| this.RowEditing += new
GridViewEditEventHandler(EditableGrid_RowEditing);
| this.RowCancelingEdit += new
| GridViewCancelEditEventHandler(EditableGrid_RowCancelingEdit);
| this.RowUpdating += new
| GridViewUpdateEventHandler(EditableGrid_RowUpdating);
| this.RowDeleting += new
| GridViewDeleteEventHandler(EditableGrid_RowDeleting);
| this.Sorting += new GridViewSortEventHandler(EditableGrid_Sorting);
| this.PageIndexChanged += new
EventHandler(EditableGrid_PageIndexChanged);
| #endregion
| }
| #endregion
| #region protected override int CreateChildControls(IEnumerable
dataSource,
| bool dataBinding)
| protected override int CreateChildControls(IEnumerable dataSource, bool
| dataBinding)
| {
| int rows = base.CreateChildControls(dataSource, dataBinding);
|
| // no data rows created, create empty table if enabled
| if (rows == 0 && (ShowFooterWhenEmpty || ShowHeaderWhenEmpty))
| {
| // create the table
| Table table = CreateChildTable();
| Controls.Clear();
| Controls.Add(table);
| DataControlField[] fields;
| if (AutoGenerateColumns)
| {
| PagedDataSource source = new PagedDataSource();
| source.DataSource = dataSource;
| ICollection autoGeneratedColumns =
CreateColumns(source,
| true);
| fields = new
| DataControlField[autoGeneratedColumns.Count];
| autoGeneratedColumns.CopyTo(fields, 0);
| }
| else
| {
| fields = new DataControlField[Columns.Count];
| Columns.CopyTo(fields, 0);
| }
|
| TableRowCollection newRows = table.Rows;
| if (ShowHeaderWhenEmpty)
| {
| // create a new header row
| _headerRow = CreateRow(-1, -1,
| DataControlRowType.Header, DataControlRowState.Normal);
| InitializeRow(_headerRow, fields, newRows);
| }
|
| //// create the empty row
| GridViewRow emptyRow = new GridViewRow(-1, -1,
| DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
| TableCell cell = new TableCell();
| cell.ColumnSpan = fields.Length;
| cell.Width = Unit.Percentage(100);
| //
| if (EmptyDataTemplate != null)
| {
| EmptyDataTemplate.InstantiateIn(cell);
| }
| else if (!string.IsNullOrEmpty(EmptyDataText))
| //else if (!string.IsNullOrEmpty(EmptyDataText) &&
| MyPrj.SNF.Web.Utils.Utils.InReadMode())
| {
| cell.Controls.Add(new LiteralControl(EmptyDataText));
| }
| emptyRow.Cells.Add(cell);
| GridViewRowEventArgs e = new
GridViewRowEventArgs(emptyRow);
| OnRowCreated(e);
| newRows.Add(emptyRow);
| emptyRow.DataBind();
| OnRowDataBound(e);
| emptyRow.DataItem = null;
| if (ShowFooterWhenEmpty &&
| !MyPrj.SNF.Web.Utils.Utils.InReadMode())
| {
| // create footer row
| _footerRow = CreateRow(-1, -1,
| DataControlRowType.Footer, DataControlRowState.Normal);
| InitializeRow(_footerRow, fields, newRows);
| }
| }
| return rows;
| }
| #endregion
| #region protected override void Render()
| protected override void Render(HtmlTextWriter writer)
| {
| if (DataSource != null && GridMode == GridViewMode.Editable)
| {
| IList listRows = DataSource as IList;
| int rowIndex = 0;
| string itemCountHiddenField = "<input type=\"hidden\"
| name=\"" + this.PropertyName + "Count" + "\" id=\"" + this.PropertyName +
| "Count" + "\" value=\"" + listRows.Count.ToString() + "\" />";
| writer.WriteLine(itemCountHiddenField);
| foreach (MyPrj.SNF.Model.IDomainObject domainObject in
| listRows)
| {
| foreach (GridViewColumnMetaData columnMetaData in
| MetaData.Columns)
| {
| object propValue =
| Utils.Utils.GetPropertyValue(domainObject, columnMetaData.PropertyName);
| string propertyValue = string.Empty;
| if (propValue != null)
| propertyValue = propValue.ToString();
| // Replace line breaks with a single space
| // Escape Double Quotes & backslashes so the
value
| can be put safely into the array and hidden fields
| propertyValue = propertyValue.Replace("\r\n", "
| ").Replace(@"\", @"\\").Replace(@"""", "\\\"");
|
|
| string hiddenFieldId = (PropertyName + "_" +
| rowIndex + "_" + columnMetaData.PropertyName);
| string hiddenFieldToRender = "<input
type=\"hidden\"
| name=\"" + hiddenFieldId + "\" id=\"" + hiddenFieldId + "\" value=\"" +
| propertyValue + "\" />";
| writer.WriteLine(hiddenFieldToRender);
| }
| rowIndex++;
| }
| }
| base.Render(writer);
| RenderHiddenFieldsForActions();
| }
| #endregion
| #region protected override void LoadControlState()
| /// <summary>
| /// Manages the Sort information.
| /// </summary>
| /// <param name="savedState"></param>
| protected override void LoadControlState(object savedState)
| {
| object[] states = (object[])savedState;
| base.LoadControlState(states[0]);
|
| CSSortExpression = (string)states[1];
| CSSortDirection =
| (MyPrj.SNF.Application.SortDirection)states[2];
| }
| #endregion
| #region protected override object SaveControlState()
| protected override object SaveControlState()
| {
| object[] states = new object[3];
| states[0] = base.SaveControlState();
|
| states[1] = CSSortExpression;
| states[2] = CSSortDirection;
|
| return states;
| }
| #endregion
| protected override void OnDataBinding(EventArgs e)
| {
| DataSource = Utils.Utils.GetPropertyValue(PropertyName) as
| IList;
| addColumns();
| base.OnDataBinding(e);
| }
| protected override void OnRowCreated(GridViewRowEventArgs e)
| {
| if (e.Row.DataItem != null && e.Row.RowType ==
| DataControlRowType.DataRow)
| {
| object isRowDeleted =
| Utils.Utils.GetPropertyValue((IDomainObject)e.Row.DataItem,
| "HasBeenDeleted");
| addRowEvents(e.Row, (bool)isRowDeleted);
| }
|
| #region Add footer row events
| if (MetaData != null && EditIndex < 0 && e.Row.RowType ==
| DataControlRowType.Footer)
| {
| foreach (GridViewActionInfo actionInfo in MetaData.Actions)
| {
| System.Web.UI.WebControls.LinkButton lb = new
| System.Web.UI.WebControls.LinkButton();
| if (actionInfo.EventLocation ==
| GridViewActionInfo.EventLocationCode.FooterRow)
| {
| lb.Text = actionInfo.DisplayName;
| lb.ID = "lnk" + this.ID + actionInfo.EventName;
| lb.CommandName = actionInfo.CommandType.ToString();
| lb.CausesValidation = actionInfo.CausesValidation;
| lb.ValidationGroup = this.ID;
| lb.OnClientClick = getGridEventOnClickString(e.Row, lb,
| true, 0, actionInfo.CausesValidation,
actionInfo.ClientSideEventHandlerName,
| actionInfo.ActionParameters);
| lb.Attributes.Add("href", "#");
| addActionCell(e.Row, lb);
| TableHeaderCell c = new TableHeaderCell();
| c.Text = "";
| HeaderRow.Cells.Add(c);
| }
| }
| }
| #endregion
|
| base.OnRowCreated(e);
| }
| #region Delegated Events
|
| #region void EditableGrid_RowEditing(object sender,
GridViewEditEventArgs
| e)
| void EditableGrid_RowEditing(object sender, GridViewEditEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = e.NewEditIndex;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowDeleting(object sender,
| GridViewDeleteEventArgs e)
| void EditableGrid_RowDeleting(object sender, GridViewDeleteEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems = Activator.CreateInstance(domainObjectType);
| Array dataSourceItems = DataSource as Array;
| objItems = dataSourceItems.GetValue(e.RowIndex);
| Array updatedItems = getUpdatedItems((IList)DataSource, objItems,
| domainObjectType, e.RowIndex, "HasBeenDeleted", true);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowUpdating(object sender,
| GridViewUpdateEventArgs e)
| void EditableGrid_RowUpdating(object sender, GridViewUpdateEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems = Activator.CreateInstance(domainObjectType);
| foreach (System.Web.UI.Control c in
| this.Rows[e.RowIndex].Controls)
| {
| //First level is table cell level.. we need to go one
more
| level..
| if (c is DataControlFieldCell && c.Controls.Count > 0)
| {
| System.Web.UI.Control ec = c.Controls[0] as
| System.Web.UI.Control;
| setEachControlValues(ec, objItems);
| }
| }
|
| Array updatedItems = getUpdatedItems((IList)DataSource,
| objItems, domainObjectType, e.RowIndex, "HasBeenEdited", true);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowCommand(object sender,
| GridViewCommandEventArgs e)
| void EditableGrid_RowCommand(object sender, GridViewCommandEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| #region -- insert new row code here
|
| if (e.CommandName.Equals("Add"))
| {
| //Here we have to get each item value from the controls.
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
| Activator.CreateInstance(domainObjectType);
| foreach (System.Web.UI.Control c in
this.FooterRow.Controls)
| {
| //First level is table cell level.. we
| //need to go one more level..
| if (c.GetType().Name == "DataControlFieldCell" &&
| c.Controls.Count > 0)
| {
| System.Web.UI.Control ec = c.Controls[0] as
| System.Web.UI.Control;
| setEachControlValues(ec, objItems);
| }
| }
|
| Array addedItems = getAddedItems((IList)DataSource,
| objItems);
| setPropertyArrayValue(addedItems);
| this.DataSource = addedItems as IList;
| this.DataBind();
| }
|
| #endregion
|
| #region -- restore rows here
|
| if (e.CommandName.Equals("Restore"))
| {
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
| Activator.CreateInstance(domainObjectType);
| Array dataSourceItems = DataSource as Array;
| objItems =
| dataSourceItems.GetValue(Convert.ToInt32(e.CommandArgument));
| Array updatedItems = getUpdatedItems((IList)DataSource,
| objItems, domainObjectType, Convert.ToInt32(e.CommandArgument),
| "HasBeenDeleted", false);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
|
| #endregion
| }
| #endregion
| #region void EditableGrid_RowCancelingEdit(object sender,
| GridViewCancelEditEventArgs e)
| void EditableGrid_RowCancelingEdit(object sender,
| GridViewCancelEditEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_Sorting(object sender,
| GridViewSortEventArgs e)
| void EditableGrid_Sorting(object sender, GridViewSortEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| MyPrj.SNF.Web.Controller.RequestContext CurrentRequestContext
=
| Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
| MyPrj.SNF.Web.Controller.RequestContext;
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| CurrentRequestContext.CurrentControllerData;
|
| if (CSSortExpression !=
| ((GridViewSortEventArgs)e).SortExpression)
| CSSortDirection =
| MyPrj.SNF.Application.SortDirection.Ascending;
| else
| CSSortDirection = (CSSortDirection ==
| MyPrj.SNF.Application.SortDirection.Descending) ?
| MyPrj.SNF.Application.SortDirection.Ascending :
| MyPrj.SNF.Application.SortDirection.Descending;
|
| CSSortExpression = ((GridViewSortEventArgs)e).SortExpression;
| Array.Sort(DataSource as Array, new
| MyPrj.SNF.Application.ClassComparer(CSSortExpression, CSSortDirection));
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_PageIndexChanged(object sender,
EventArgs
| e)
| void EditableGrid_PageIndexChanged(object sender, EventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| bool displayLastPage = false;
| //try
| //{
| if (((GridViewPageEventArgs)e).NewPageIndex > -1)
| PageIndex = ((GridViewPageEventArgs)e).NewPageIndex;
| else
| displayLastPage = true;
| IList list = DataSource as IList;
| if (displayLastPage)
| PageIndex = (int)Math.Ceiling(((double)list.Count /
| PageSize)) - 1;
| this.DataBind();
| //}
| //catch (Exception expGeneral)
| //{
| // throw;
| //}
| }
|
| #endregion
|
| #endregion
| #endregion
|
| #region void addColumns()
|
| private void addColumns()
| {
| if (MetaData == null)
| MetaData =
GridViewMetaData.GetGridViewMetaData(MetaDataId);
| Columns.Clear();
|
| #region - all the controls
|
| foreach (GridViewColumnMetaData columnMetaData in
| MetaData.Columns)
| {
|
| if (columnMetaData.IsDisplayed)
| {
| TemplateField columnField = new TemplateField();
| columnField.HeaderText = columnMetaData.HeaderText;
| if (columnMetaData.IsSortable)
| columnField.SortExpression =
| columnMetaData.SortPropertyName;
| columnField.ItemStyle.HorizontalAlign =
| columnMetaData.HorizontalAlign;
| columnField.ItemStyle.Width = columnMetaData.Width;
|
| if (GridMode == GridViewMode.Editable)
| {
| columnField.ItemTemplate = new
| GridViewTemplate(ListItemType.Item, MetaData, columnMetaData, this.ID);
| columnField.EditItemTemplate = new
| GridViewTemplate(ListItemType.EditItem, MetaData, columnMetaData,
this.ID);
|
| if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
| this.EditIndex < 0)
| {
| columnField.FooterTemplate = new
| GridViewTemplate(ListItemType.Footer, MetaData, columnMetaData, this.ID);
| }
| }
| //Add the newly created bound field to the GridView.
| Columns.Add(columnField);
| }
| }
|
| #endregion
|
| #region ------- add check box to each row if render selection
is
| specified
|
|
| if ((MetaData.ShowSelectionInReadMode &&
| MyPrj.SNF.Web.Utils.Utils.InReadMode()) ||
| (MetaData.ShowSelectionInEditableMode &&
| !MyPrj.SNF.Web.Utils.Utils.InReadMode()))
| {
| GridViewColumnMetaData gvMetaData = new
| GridViewColumnMetaData(MetaData.SelectionPropertyName, "Select", false);
| gvMetaData.ColumnType = "DomainObjectSelection";
| TemplateField selectionField = new TemplateField();
| selectionField.ItemTemplate = new
| GridViewTemplate(ListItemType.EditItem, MetaData, gvMetaData, this.ID);
| Columns.Add(selectionField);
| }
|
| #endregion
|
| }
|
|
|
| #endregion
|
| #region private string getControlIndex()
| private string getControlIndex(bool isFooterRow, int dataRowIndex)
| {
| //This is not a real code......????
| //what do i do if there is no option..
| string controlIndex = "";
| int startCount = 0;
|
| if (isFooterRow)
| {
| startCount = 3;
| if (Rows.Count > 1)
| startCount = 3 + (Rows.Count - 1);
|
| if (startCount < 10)
| controlIndex = "$ctl0" + startCount.ToString() + "$";
| else
| controlIndex = "$ctl" + startCount.ToString() + "$";
| }
| else
| {
| startCount = 2 + dataRowIndex;
| if (startCount < 10)
| controlIndex = "$ctl0" + startCount.ToString() + "$";
| else
| controlIndex = "$ctl" + startCount.ToString() + "$";
| }
|
| return controlIndex;
| }
| #endregion
|
| #region private void addRowEvents(GridViewRow gr)
| private void addRowEvents(GridViewRow gr, bool isDeleted)
| {
|
| System.Web.UI.WebControls.LinkButton lb = new
| System.Web.UI.WebControls.LinkButton();
| if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
| ShowGridViewEditButtons)
| {
|
| #region //first add the data row events
|
| foreach (GridViewActionInfo actionInfo in
MetaData.Actions)
| {
| if (actionInfo.EventLocation ==
| GridViewActionInfo.EventLocationCode.DataRow)
| {
| lb = new System.Web.UI.WebControls.LinkButton();
| lb.ID = "lnk" + this.ID + actionInfo.EventName;
| lb.Text = actionInfo.DisplayName;
| lb.CommandName =
actionInfo.CommandType.ToString();
| lb.ValidationGroup = this.ID;
| lb.CausesValidation = actionInfo.CausesValidation;
| lb.Attributes.Add("href", "#");
| lb.OnClientClick = getGridEventOnClickString(gr,
lb,
| false, gr.RowIndex, actionInfo.CausesValidation,
| actionInfo.ClientSideEventHandlerName, actionInfo.ActionParameters);
|
|
| if (actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.SNF)
| lb.OnClientClick =
| getSNFOnclickString(actionInfo, gr);
| else if (isDeleted && actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.Restore)
| {
| //If its deleted row then just show the
restore
| event and return
| removeActionCell(gr);
| //set the deleted row css class
| gr.CssClass = RemovedItemCssClass;
| lb.CommandArgument = gr.RowIndex.ToString();
| addActionCell(gr, lb);
| addEmptyCell(gr);
| return;
| }
|
|
| bool addThis = false;
| if (EditIndex == gr.RowIndex &&
| (actionInfo.CommandType == GridViewActionInfo.CommandTypeCode.Update ||
| actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.Cancel))
| addThis = true;
| else if (EditIndex < 0 && EditIndex !=
gr.RowIndex
| && (actionInfo.CommandType != GridViewActionInfo.CommandTypeCode.Update &&
| actionInfo.CommandType !=
| GridViewActionInfo.CommandTypeCode.Cancel && actionInfo.CommandType !=
| GridViewActionInfo.CommandTypeCode.Restore))
| addThis = true;
|
| if (addThis)
| addActionCell(gr, lb);
|
| }
| }
|
| #endregion
|
|
| #region //Add header row for the event
|
| TableHeaderCell c = new TableHeaderCell();
| c.Text = "";
| HeaderRow.Cells.Add(c);
|
| #endregion
|
| }
| }
| #endregion
|
| #region protected void RenderHiddenFieldsForActions()
| protected void RenderHiddenFieldsForActions()
| {
| if (MetaData == null || MetaData.Actions == null ||
| MetaData.Actions.Count < 1 || DataSource == null ||
| ((IList)DataSource).Count == 0)
| return;
|
| Hashtable hiddenFieldIds = new Hashtable();
| foreach (GridViewActionInfo actionInfo in MetaData.Actions)
| {
| if (actionInfo.ActionParameters != null)
| {
| foreach (string argumentName in
| actionInfo.ActionParameters.AllKeys)
| {
| if
| (!hiddenFieldIds.ContainsKey(actionInfo.ActionParameters[argumentName]))
|
hiddenFieldIds[actionInfo.ActionParameters[argumentName]]
| = null;
| }
| }
| }
| foreach (string hiddenFieldId in hiddenFieldIds.Keys)
| {
| // Add the Hidden Field only if the page doesn't already
| contain a control with same ID
| if (!Utils.Utils.IsControlOnPage(Page, hiddenFieldId))
| {
| //For ajax postback we will have to register the
hidden
| fields
| ScriptManager sm = ScriptManager.GetCurrent(Page);
| if (sm != null && sm.IsInAsyncPostBack)
|
System.Web.UI.ScriptManager.RegisterHiddenField(this,
| hiddenFieldId, string.Empty);
| else
|
Page.ClientScript.RegisterHiddenField(hiddenFieldId,
| string.Empty);
| }
| }
| }
| #endregion
|
| #region private string getSNFOnclickString(GridViewActionInfo
| actionInfo,GridViewRow gr)
| private string getSNFOnclickString(GridViewActionInfo actionInfo,
| GridViewRow gr)
| {
| System.Text.StringBuilder sb = new
System.Text.StringBuilder();
| if (actionInfo.ActionParameters != null &&
| actionInfo.ActionParameters.Count > 0)
| {
| Type gridType = gr.DataItem.GetType();
| List<string> parameters = new List<string>();
| foreach (string propertyName in actionInfo.ActionParameters.AllKeys)
| {
| if (actionInfo.ActionParameters[propertyName] != null)
| {
| string controlId =
| actionInfo.ActionParameters[propertyName];
| object propertyValue =
| gridType.GetProperty(propertyName).GetValue(gr.DataItem, null);
| if (PropertyUtilities.IsNullValue(propertyValue))
| propertyValue = string.Empty;
|
| parameters.Add(controlId + "~" + propertyValue);
| }
| }
| object[] args = new object[] { "this",
actionInfo.EventName,
| actionInfo.ClientSideEventHandlerName, string.Join("-",
| parameters.ToArray()), gr.RowIndex };
| return
|
string.Format("processGridViewEvent(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\")
",
| args);
| }
| return string.Empty;
| }
| #endregion
|
| #region private string getGridEventOnClickString()
| private string getGridEventOnClickString(GridViewRow gridRow,
| System.Web.UI.WebControls.LinkButton lb, bool isFooterRow, int
dataRowIndex,
| bool causeValidation, string clientSideEventHandlerName,
NameValueCollection
| actionParameters)
| {
| string validationGroup = "donotValidate";
| if (causeValidation)
| validationGroup = ID;
|
| string uniqId = this.UniqueID + getControlIndex(isFooterRow,
| dataRowIndex) + lb.UniqueID;
| if (!string.IsNullOrEmpty(clientSideEventHandlerName))
| {
| List<string> parameters = new List<string>();
| parameters.Add("''");
| if (actionParameters != null && actionParameters.Count > 0)
| {
| parameters.Clear();
| Type gridType = gridRow.DataItem.GetType();
| foreach (string propertyName in actionParameters.AllKeys)
| {
| if (actionParameters[propertyName] != null)
| {
| string controlId = actionParameters[propertyName];
| object propertyValue =
| gridType.GetProperty(propertyName).GetValue(gridRow.DataItem, null);
| if (PropertyUtilities.IsNullValue(propertyValue))
| propertyValue = string.Empty;
| parameters.Add(controlId + "~" + propertyValue);
| }
| }
| }
|
| return string.Format("return
|
handleThenFireButtonEvent(\"{0}\",\"{1}\",\"{2}\",{3},\"{4}\",\"{5}\",\"{6}\
",\"{7}\",\"{8}\")",
| "this", GridPostbackEvent, clientSideEventHandlerName, "true",
| string.Join("-", parameters.ToArray()), validationGroup, uniqId,
| lb.CommandArgument, UpdatePanelId);
| }
| object[] args = new object[] { };
| return string.Format("return
|
validateAndFireButtonEventGroup(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\",\"{5
}\")",
| "this", GridPostbackEvent, validationGroup, uniqId, lb.CommandArgument,
| UpdatePanelId);
| }
| #endregion
|
| #region private TableRow addActionCell()
| private void addActionCell(GridViewRow gr,
| System.Web.UI.WebControls.LinkButton lb)
| {
| System.Web.UI.WebControls.TableCell tc = new TableCell();
| tc.Controls.Add(lb);
| ((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
| }
| #endregion
|
| #region private TableRow addEmptyCell()
| private void addEmptyCell(GridViewRow gr)
| {
| System.Web.UI.WebControls.TableCell tc = new TableCell();
| tc.Text = "&nbsp;&nbsp;";
| ((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
| }
| #endregion
|
| #region private void removeActionCell()
| private void removeActionCell(GridViewRow gr)
| {
| TableCell[] tmpcell = new TableCell[gr.Cells.Count];
| gr.Cells.CopyTo(tmpcell, 0);
| foreach (TableCell c in tmpcell)
| {
| System.Web.UI.Control ctrl = new System.Web.UI.Control();
| if (c.Controls.Count > 0)
| ctrl = c.Controls[0];
| if (ctrl != null && ctrl.GetType().Name == "LinkButton")
| gr.Cells.Remove(c);
| }
|
| }
| #endregion
|
| #region private void setEachControlValues()
| private void setEachControlValues(System.Web.UI.Control ec,
object
| objItems)
| {
| switch (ec.GetType().Name)
| {
| case "TextBox":
| TextBox ctrlText = (TextBox)ec;
| setControlValue(ctrlText.ID, ctrlText.Text, objItems);
| break;
| case "HiddenField":
| HiddenField ctrl = (HiddenField )ec;
| setControlValue(ctrl.ID, ctrl.Value, objItems);
| break;
| case "DateBox":
| DateBox ctrlDB = (DateBox)ec;
| setControlValue(ctrlDB.ID, ctrlDB.Text, objItems);
| break;
| case "DateTimeBox":
| DateTimeBox ctrlDTB = (DateTimeBox)ec;
| setControlValue(ctrlDTB.ID, ctrlDTB.Text, objItems);
| break;
| case "CheckBox":
| CheckBox ctrlCheck = (CheckBox)ec;
| string valueToSet = "N";
| if (ctrlCheck.Checked)
| valueToSet = "Y";
| setControlValue(ctrlCheck.ID, valueToSet, objItems);
| break;
| case "DropDownList":
| DropDownList ctrldrp = (DropDownList)ec;
| setControlValue(ctrldrp.ID, ctrldrp.SelectedValue,
| objItems);
| break;
| //also needs to set the ctrldrp.Text to the label control
| //in the Items templates
| case "RadioButtonList":
| RadioButtonList ctrlRdo = (RadioButtonList)ec;
| setControlValue(ctrlRdo.ID, ctrlRdo.SelectedValue,
| objItems);
| break;
| case "Label":
| Label ctrlLabel = (Label)ec;
| setControlValue(ctrlLabel.ID, ctrlLabel.Text,
objItems);
| break;
| }
|
| }
|
| #endregion
|
| #region public GridViewMetaData MetaData
| private GridViewMetaData _MetaData;
| public GridViewMetaData MetaData
| {
| get { return _MetaData; }
| set { _MetaData = value; }
| }
| #endregion
|
| #region public string DomainObjectName
| private string _domainObjectName;
| public string DomainObjectName
| {
| get { return _domainObjectName; }
| set { _domainObjectName = value; }
| }
| #endregion
|
| #region public string DomainObjectListKey
| private string _DomainObjectListKey;
| public string DomainObjectListKey
| {
| get { return _DomainObjectListKey; }
| set { _DomainObjectListKey = value; }
| }
| #endregion
|
| #region public string MetaDataId
| private string _MetaDataId;
| public string MetaDataId
| {
| get { return _MetaDataId; }
| set { _MetaDataId = value; }
| }
| #endregion
|
| #region public string GridPostbackEvent
| private string _GridPostbackEvent;
| public string GridPostbackEvent
| {
| get { return _GridPostbackEvent; }
| set { _GridPostbackEvent = value; }
| }
| #endregion
|
| #region public bool BypassGridEvent
| private bool _BypassGridEvent = false;
| public bool BypassGridEvent
| {
| get { return _BypassGridEvent; }
| set { _BypassGridEvent = value; }
| }
| #endregion
|
| #region public bool ShowGridViewEditButtons
| private bool _ShowGridViewEditButtons;
| public bool ShowGridViewEditButtons
| {
| get { return _ShowGridViewEditButtons; }
| set { _ShowGridViewEditButtons = value; }
| }
| #endregion
|
| #region public string PropertyName
| private string _PropertyName = string.Empty;
| public string PropertyName
| {
| get { return _PropertyName; }
| set { _PropertyName = value; }
| }
| #endregion
|
| #region private Array getAddedItems()
| private Array getAddedItems(IList oldList, object addedItems)
| {
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| int arrayLength = 1;
| if (oldList != null && oldList.Count > 0)
| arrayLength = oldList.Count + 1;
| Array arrayItems = Array.CreateInstance(addedItems.GetType(),
| arrayLength);
| int i = 0;
| if (oldList != null && oldList.Count > 0)
| {
| foreach (IDomainObject dm in oldList)
| {
| arrayItems.SetValue(dm, i);
| i++;
| }
| }
| arrayItems.SetValue(addedItems, i);
| return arrayItems;
| }
| #endregion
|
| #region private Array getUpdatedItems()
| private Array getUpdatedItems(IList oldList, object updatedItems,
| Type domainObjectType, int rowIndex, string propertyToUpdate, bool value)
| {
| //Also set the HasBeenEdited/HasBeenDeleted field with the
value
| true/false..
| setControlValue(propertyToUpdate, value, updatedItems);
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| Array arrayItems = Array.CreateInstance(domainObjectType,
| oldList.Count);
| int i = 0;
| foreach (IDomainObject dm in oldList)
| {
| if (i == rowIndex)//if the row index match the current object then
| replace the displayed column's values with the updated one
| {
| foreach (GridViewColumnMetaData columnMetaData in MetaData.Columns)
| {
| if (columnMetaData.IsDisplayed)
| {
| PropertyUtilities.SetValue(dm, columnMetaData.PropertyName,
| PropertyUtilities.GetValue((IDomainObject)updatedItems,
| columnMetaData.PropertyName));
| }
| }
| }
| // also set hasbeenEdited/hasbeenDeleted with true/false
| setControlValue(propertyToUpdate, value, dm);
| arrayItems.SetValue(dm, i);
| i++;
| }
| return arrayItems;
| }
| #endregion
|
| #region private Array getRemovedItems()
| private Array getRemovedItems(IList oldList, object removedItems,
| int rowIndex)
| {
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| Array arrayItemsToCopy =
| Array.CreateInstance(removedItems.GetType(), oldList.Count);
| Array arrayItems =
Array.CreateInstance(removedItems.GetType(),
| oldList.Count - 1);
| int i = 0;
| foreach (IDomainObject dm in oldList)
| {
| if (i != rowIndex)//if the row index match the current
| object then remove it(do not add to list)
| arrayItemsToCopy.SetValue(dm, i);
| i++;
| }
|
| int newArrayCount = 0;
| for (int j = 0; j < arrayItemsToCopy.Length; j++)
| {
| if (arrayItemsToCopy.GetValue(j) != null)
| {
| arrayItems.SetValue(arrayItemsToCopy.GetValue(j),
| newArrayCount);
| newArrayCount++;
| }
| }
|
| return arrayItems;
| }
| #endregion
|
| #region private void setControlValue()
| private void setControlValue(string propertyName, object value,
| object dObject)
| {
| PropertyInfo pi = null;
| pi = dObject.GetType().GetProperty(propertyName);
| SNF.Model.PropertyUtilities.SetValue((IDomainObject)dObject,
pi,
| value);
|
| }
| #endregion
|
| #region private void setPropertyArrayValue()
| private void setPropertyArrayValue(Array arrayItems)
| {
|
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| IDomainObject domainObject =
CurrentControllerData.DomainObject;
| PropertyInfo pi =
| domainObject.GetType().GetProperty(PropertyName);
| pi.SetValue(domainObject, arrayItems, null);
| }
| #endregion
|
| #region private void ProcessControllerEvent()
| private void ProcessControllerEvent(string eventName)
| {
| // Process the current event
|
| MyPrj.SNF.Web.Controller.RequestContext CurrentRequestContext
=
| Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
| MyPrj.SNF.Web.Controller.RequestContext;
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| CurrentRequestContext.CurrentControllerData;
| CurrentControllerData.EventName = eventName;
|
| MyPrj.SNF.Web.Controller.ProcessResult pr =
| MyPrj.SNF.Web.Controller.EventProcessor.ProcessEvent(
| CurrentRequestContext, CurrentControllerData.StateId,
| CurrentControllerData.EventName);
|
| CurrentControllerData.EventName = pr.EventName; // Capture
the
| EventName from the result;
| }
| #endregion
|
| #region private void addAjaxSupport()
| private void addAjaxSupport(bool add)
| {
| ScriptManager
| sm = ScriptManager.GetCurrent(Page);
| if (sm == null)
| throw new HttpException("A ScriptManager control must
exist
| on the current page.");
| UpdatePanel updatePanel = new UpdatePanel();
| updatePanel.UpdateMode = UpdatePanelUpdateMode.Conditional;
| updatePanel.ID = "updatePanel" + this.ID;
| updatePanel.ContentTemplateContainer.Controls.Add(this);
| this.Controls.Add(updatePanel);
| }
| #endregion
|
| #region -- section to show/hide empty header and footer rows
|
| private GridViewRow _headerRow;
| private GridViewRow _footerRow;
|
| private bool _showHeaderWhenEmpty;
| private bool _showFooterWhenEmpty;
|
| public bool ShowHeaderWhenEmpty
| {
| get { return _showHeaderWhenEmpty; }
| set { _showHeaderWhenEmpty = value; }
| }
|
| public bool ShowFooterWhenEmpty
| {
| get { return _showFooterWhenEmpty; }
| set { _showFooterWhenEmpty = value; }
| }
|
| public override GridViewRow HeaderRow
| {
| get { return base.HeaderRow ?? _headerRow; }
| }
|
| public override GridViewRow FooterRow
| {
| get { return base.FooterRow ?? _footerRow; }
| }
|
| private void InitializeRow(GridViewRow row, DataControlField[]
| fields, TableRowCollection newRows)
| {
| GridViewRowEventArgs e = new GridViewRowEventArgs(row);
| InitializeRow(row, fields);
| OnRowCreated(e);
| newRows.Add(row);
| row.DataBind();
| OnRowDataBound(e);
| row.DataItem = null;
| }
|
| #endregion
|
| #region protected void SetupStyleAndBehaviour ()
| protected virtual void SetupStyleAndBehaviour()
| {
| EnableViewState = false;
| AutoGenerateColumns = false;
|
| AllowSorting = true;
| AllowPaging = true;
| EnableSortingAndPagingCallbacks = false;
| AutoGenerateSelectButton = false;
| AutoGenerateDeleteButton = false;
| AutoGenerateEditButton = false;
|
| ShowHeader = true;
| ShowFooter = true;
| EmptyDataText = "No records found";
|
| CssClass = "grid";
| CellPadding = 3;
| CellSpacing = 0;
| GridLines = GridLines.Horizontal;
|
| PageSize = 20;
| PagerStyle.CssClass = "gridPager";
| PagerSettings.FirstPageText = "<<";
| PagerSettings.PreviousPageText = "<";
| PagerSettings.NextPageText = ">";
| PagerSettings.LastPageText = ">>";
| PagerSettings.PageButtonCount = 10;
| PagerSettings.Mode = PagerButtons.NumericFirstLast;
|
| RowStyle.CssClass = "gridRow";
| SelectedRowStyle.CssClass = "gridSelectedRow";
| HeaderStyle.CssClass = "gridViewHeader";
| FooterStyle.CssClass = "gridfooter";
| AlternatingRowStyle.CssClass = "gridAlternatingRow";
| RemovedItemCssClass = "gridDeletedRow";
| }
| #endregion
|
| #region public GridViewMode GridMode
| private GridViewMode _GridMode = GridViewMode.Editable;
| /// <summary>
| ///
| /// </summary>
| public GridViewMode GridMode
| {
| get { return _GridMode; }
| set { _GridMode = value; }
| }
| #endregion
|
| #region Custom Management of SortExpression & SortDirection
|
| #region public string CSSortExpression
| private string _CSSortExpression;
| public string CSSortExpression
| {
| get { return _CSSortExpression; }
| set { _CSSortExpression = value; }
| }
| #endregion
|
| #region public SortDirection CSSortDirection
| private MyPrj.SNF.Application.SortDirection _CSSortDirection;
| public MyPrj.SNF.Application.SortDirection CSSortDirection
| {
| get { return _CSSortDirection; }
| set { _CSSortDirection = value; }
| }
| #endregion
|
| #endregion Custom Management of SortExpression & SortDirection
|
| #region public string RemovedItemCssClass
| private string _RemovedItemCssClass;
| public string RemovedItemCssClass
| {
| get { return _RemovedItemCssClass; }
| set { _RemovedItemCssClass = value; }
| }
| #endregion
|
| #region public string UpdatePanelId
| private string _UpdatePanelId;
| public string UpdatePanelId
| {
| get { return _UpdatePanelId; }
| set { _UpdatePanelId = value; }
| }
| #endregion
| }
| }
|
|
|
| | > hello, I have 2 new issues:
| >
| > 1. My control is overriding OnRowCreated and it calls
base.OnRowCreated
| > and on my aspx.cs page i am attaching an event handler to this
RowCreated
| > but it is not running. I also tried to add an event handler to
| > RowDataBound and calling base.OnRowDataBound and it doesnt get called
in
| > aspx.cs either.
| >
| > What could be the cause of this? I dont understand since i'm calling
base
| > implementation (which seeing the code thru reflector it calls any
attached
| > handlers)
| >
| > 2. This is related somehow to first point. As stated in the first
problem
| > you already resolved, i attached event handlers in my custom control
| > instead of overriding them and that caused my event handlers on aspx.cs
| > page to be called correctly for most of them. When i tried to attach
event
| > handler for RowCreated in custom control, it is not called, but when I
| > override OnRowCreated it is called. Even when I attached event handler
for
| > RowCreated in custom control AND aspx.cs page, neither were called. The
| > grid events that I am currently using successfully on aspx.cs are
| > RowUpdating and RowEditing, both of which are also attached event
handlers
| > in custom control.
| >
| > thanks
| >
| > | >> Hi,
| >>
| >> Do you have any further questions? If you have please provide some
code
| >> so
| >> that I can test it on my side.
| >>
| >> Regards,
| >> Allen Chen
| >> Microsoft Online Community Support
| >>
| >> --------------------
| >> | From: "TS" <[email protected]>
| >> | References: <#[email protected]>
| >> <#[email protected]>
| >> <[email protected]>
| >> <[email protected]>
| >> | Subject: Re: overriding GridView.OnRowDeleting - can call registered
| >> event handlers
| >> | Date: Wed, 22 Oct 2008 11:07:08 -0500
| >> | Lines: 223
| >> | X-Priority: 3
| >> | X-MSMail-Priority: Normal
| >> | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | X-RFC2646: Format=Flowed; Original
| >> | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | Message-ID: <[email protected]>
| >> | Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | NNTP-Posting-Host: 168.38.106.193
| >> | Path:
TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| >> | Xref: TK2MSFTNGHUB02.phx.gbl
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols:1142
| >> | X-Tomcat-NG:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> |
| >> | that did it, but for some reason the delegates for DataBinding was
not
| >> | getting called, but that method does call base.DataBind, so make it
| >> | overridable is OK, though not sure why it wasnt getting called
| >> |
| >> | | >> | > Hi,
| >> | >
| >> | > Thanks for your clarification. To achieve your requirement I would
| >> suggest
| >> | > you attach an event handler in the constructor method instead of
| >> | > overriding
| >> | > the OnRowDeleting method.
| >> | >
| >> | > public class MyGridView : GridView
| >> | > {
| >> | >
| >> | > public MyGridView()
| >> | > {
| >> | > this.RowDeleting += new
| >> | > GridViewDeleteEventHandler(MyGridView_RowDeleting);
| >> | > }
| >> | > void MyGridView_RowDeleting(object sender,
| >> GridViewDeleteEventArgs
| >> | > e)
| >> | > {
| >> | > //Your code here
| >> | > }
| >> | > }
| >> | >
| >> | > Please have a try and let me know if it's what you need.
| >> | >
| >> | > Regards,
| >> | > Allen Chen
| >> | > Microsoft Online Support
| >> | >
| >> | > --------------------
| >> | > | From: "TS" <[email protected]>
| >> | > | References: <#[email protected]>
| >> | > <#[email protected]>
| >> | > | Subject: Re: overriding GridView.OnRowDeleting - can call
| >> registered
| >> | > event handlers
| >> | > | Date: Tue, 21 Oct 2008 11:38:04 -0500
| >> | > | Lines: 136
| >> | > | X-Priority: 3
| >> | > | X-MSMail-Priority: Normal
| >> | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | > | X-RFC2646: Format=Flowed; Original
| >> | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | > | Message-ID: <[email protected]>
| >> | > | Newsgroups:
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | NNTP-Posting-Host: 168.38.106.193
| >> | > | Path:
| >> TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| >> | > | Xref: TK2MSFTNGHUB02.phx.gbl
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| >> | > | X-Tomcat-NG:
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > |
| >> | > | So it looks like the "else if" section of the posted code below
is
| >> | > getting
| >> | > | run, which throws an exception and this is why that
| >> base.OnRowDeleting
| >> | > is
| >> | > | commented out. Our custom OnRowDeleting does a lot of stuff in it
| >> that
| >> | > is
| >> | > | common to every grid. The only thing the base class does is call
| >> any
| >> | > | registered delegates. So if we dont add event handler in aspx
page
| >> for
| >> | > | onRowDeleting, the base class will throw this error.
| >> | > |
| >> | > | We want to not have to attach custom event handlers in every
aspx
| >> page
| >> | > that
| >> | > | uses the grid control and just let our custom gridView handle
all
| >> the
| >> | > | processing in all the grid events (onRowEditing, onRowUpdating,
| >> | > | onRowDeleting, etc.), but I need to be able to support
overriding
| >> this
| >> | > | behavior sometimes by adding a custom event handler in my aspx
| >> page.
| >> | > |
| >> | > | Could I override the each Event Handler's add/remove properties
so
| >> that
| >> | > i
| >> | > | can handle the Event[] collection myself and then i'll be able
to
| >> call
| >> | > the
| >> | > | individually registered delegates?
| >> | > | public event GridViewDeleteEventHandler RowDeleting
| >> | > |
| >> | > | {
| >> | > |
| >> | > | add
| >> | > |
| >> | > | {
| >> | > |
| >> | > | base.Events.AddHandler(EventRowDeleting, value);
| >> | > |
| >> | > | }
| >> | > |
| >> | > | remove
| >> | > |
| >> | > | {
| >> | > |
| >> | > | base.Events.RemoveHandler(EventRowDeleting, value);
| >> | > |
| >> | > | }
| >> | > |
| >> | > | }
| >> | > |
| >> | > |
| >> message
| >> | > | | >> | > | > Hi,
| >> | > | >
| >> | > | > As you said, it's a private field so we cannot access it in the
| >> custom
| >> | > | > GridView. I think we'd better focus on your following
statement:
| >> | > | >
| >> | > | > I have a custom GridView and it overrides onRowDeleting and
| >> doesn't
| >> | > | > call base.OnRowDeleting because the person implementing had
| >> | > undesirable
| >> | > | > effects.
| >> | > | >
| >> | > | > Could you tell me what're the undesirable effects and your
| >> requirement
| >> | > as
| >> | > | > well? I think if we can eliminate them this issue can be worked
| >> | > around.
| >> | > | >
| >> | > | > Regards,
| >> | > | > Allen Chen
| >> | > | > Microsoft Online Support
| >> | > | >
| >> | > | > Delighting our customers is our #1 priority. We welcome your
| >> comments
| >> | > and
| >> | > | > suggestions about how we can improve the support we provide to
| >> you.
| >> | > Please
| >> | > | > feel free to let my manager know what you think of the level of
| >> | > service
| >> | > | > provided. You can send feedback directly to my manager at:
| >> | > | > (e-mail address removed).
| >> | > | >
| >> | > | > ==================================================
| >> | > | > Get notification to my posts through email? Please refer to
| >> | > | >
| >> | >
| >>
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| >> | > | >
| >> | > | > Note: The MSDN Managed Newsgroup support offering is for
| >> non-urgent
| >> | > issues
| >> | > | > where an initial response from the community or a Microsoft
| >> Support
| >> | > | > Engineer within 1 business day is acceptable. Please note that
| >> each
| >> | > follow
| >> | > | > up response may take approximately 2 business days as the
support
| >> | > | > professional working with you may need further investigation to
| >> reach
| >> | > the
| >> | > | > most efficient resolution. The offering is not appropriate for
| >> | > situations
| >> | > | > that require urgent, real-time or phone-based interactions or
| >> complex
| >> | > | > project analysis and dump analysis issues. Issues of this
nature
| >> are
| >> | > best
| >> | > | > handled working with a dedicated Microsoft Support Engineer by
| >> | > contacting
| >> | > | > Microsoft Customer Support Services (CSS) at
| >> | > | >
| >> | >
| >>
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| >> | > | > ==================================================
| >> | > | > This posting is provided "AS IS" with no warranties, and
confers
| >> no
| >> | > | > rights.
| >> | > | >
| >> | > | > --------------------
| >> | > | > | From: "TS" <[email protected]>
| >> | > | > | Subject: overriding GridView.OnRowDeleting - can call
| >> registered
| >> | > event
| >> | > | > handlers
| >> | > | > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| >> | > | > | Lines: 24
| >> | > | > | X-Priority: 3
| >> | > | > | X-MSMail-Priority: Normal
| >> | > | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | > | > | X-RFC2646: Format=Flowed; Original
| >> | > | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | > | > | Message-ID: <#[email protected]>
| >> | > | > | Newsgroups:
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | > | NNTP-Posting-Host: 168.38.106.193
| >> | > | > | Path:
| >> | > TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| >> | > | > | Xref: TK2MSFTNGHUB02.phx.gbl
| >> | > | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| >> | > | > | X-Tomcat-NG:
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | > |
| >> | > | > | Hello, I have a custom GridView and it overrides
onRowDeleting
| >> and
| >> | > | > doesn't
| >> | > | > | call base.OnRowDeleting because the person implementing had
| >> | > undesirable
| >> | > | > | effects. the problem is I now when clients of this control
| >> register
| >> | > | > their
| >> | > | > | own event handlers for RowDeleting, it is never raised.
| >> | > | > |
| >> | > | > | I'm trying to add lines 1 - 5 to my overriden OnRowDeleting
| >> method
| >> | > but
| >> | > | > can't
| >> | > | > | because the key accessed in base.Events is EventRowDeleting,
| >> which
| >> | > is
| >> | > an
| >> | > | > | object that is a private constant that i dont have access to
in
| >> my
| >> | > | > derived
| >> | > | > | control.
| >> | > | > |
| >> | > | > | How do I get a handle to any event handlers so I can call
| >> them???
| >> | > | > |
| >> | > | > | // this is the dissasembled method for GridView:
| >> | > | > | protected virtual void OnRowDeleting(GridViewDeleteEventArgs
| >> e){
| >> | > | > bool
| >> | > | > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| >> | > | > | GridViewDeleteEventHandler handler =
| >> (GridViewDeleteEventHandler)
| >> | > | > | base.Events[EventRowDeleting];2 if (handler != null)3
{4
| >> | > | > | handler(this, e);5 } else if
(!isBoundUsingDataSourceID
| >> &&
| >> | > | > !e.Cancel)
| >> | > | > | { throw new
| >> | > | > HttpException(SR.GetString("GridView_UnhandledEvent",
| >> | > | > | new object[] { this.ID, "RowDeleting" })); }}
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | >
| >> | > |
| >> | > |
| >> | > |
| >> | >
| >> |
| >> |
| >> |
| >>
| >
| >
|
|
|
 
A

Allen Chen [MSFT]

Hi,

Have you sent the demo to me?

Regards,
Allen Chen
Microsoft Online Support
--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Wed, 29 Oct 2008 11:08:23 -0500
| Lines: 1559
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Response
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.113
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP05.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1147
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| I see now that all the events get raised when I click one of the grid's
| buttons to fire Edit, Update, etc. So on default data binding of the
grid,
| on just load of the page, the events are not getting raised. Sounds like
| something is missing from the control's code:
|
| using System;
| using System.Collections;
| using System.Collections.Specialized;
| using System.Collections.Generic;
| using System.Web.UI.WebControls;
| using System.Web.UI;
| using System.Reflection;
| using MyPrj.SNF.Model;
| using MyPrj.SNF.Application;
| using System.Data;
| using System.Web;
| /// <summary>
| /// Summary description for EditableGrid
| /// </summary>
|
| namespace MyPrj.SNF.Web.Control
| {
|
| public class EditableGrid : System.Web.UI.WebControls.GridView
| {
| public EditableGrid()
| {
| //
| // TODO: Add constructor logic here
| //
| ShowFooter = true;
| ShowHeader = true;
| ShowFooterWhenEmpty = true;
| ShowHeaderWhenEmpty = true;
| ShowGridViewEditButtons = true;
| GridPostbackEvent = "GridReload";
| EmptyDataText = "No Records Found";
| EnableViewState = false;
| SetupStyleAndBehaviour();
| }
|
| #region Events
| #region protected override void OnLoad(EventArgs e)
| protected override void OnLoad(EventArgs e)
| {
| base.OnLoad(e);
| #region Add Delegates for all grid events
| // Add delegates instead of overriding for all the grid events that
dont
| need to call base's implementation, otherwise
| // every aspx page would have to have a delegate for each grid event
that
| was supported for that grid on that page
|
| // Note: do in OnLoad so that the individual aspx pages can also do
this
| in their OnLoad and have their events
| // run first so that the BypassGridEvent flag can be set to true to
| bypass execution here.
| this.RowCommand += new
| GridViewCommandEventHandler(EditableGrid_RowCommand);
| this.RowEditing += new
GridViewEditEventHandler(EditableGrid_RowEditing);
| this.RowCancelingEdit += new
| GridViewCancelEditEventHandler(EditableGrid_RowCancelingEdit);
| this.RowUpdating += new
| GridViewUpdateEventHandler(EditableGrid_RowUpdating);
| this.RowDeleting += new
| GridViewDeleteEventHandler(EditableGrid_RowDeleting);
| this.Sorting += new GridViewSortEventHandler(EditableGrid_Sorting);
| this.PageIndexChanged += new
EventHandler(EditableGrid_PageIndexChanged);
| #endregion
| }
| #endregion
| #region protected override int CreateChildControls(IEnumerable
dataSource,
| bool dataBinding)
| protected override int CreateChildControls(IEnumerable dataSource, bool
| dataBinding)
| {
| int rows = base.CreateChildControls(dataSource, dataBinding);
|
| // no data rows created, create empty table if enabled
| if (rows == 0 && (ShowFooterWhenEmpty || ShowHeaderWhenEmpty))
| {
| // create the table
| Table table = CreateChildTable();
| Controls.Clear();
| Controls.Add(table);
| DataControlField[] fields;
| if (AutoGenerateColumns)
| {
| PagedDataSource source = new PagedDataSource();
| source.DataSource = dataSource;
| ICollection autoGeneratedColumns =
CreateColumns(source,
| true);
| fields = new
| DataControlField[autoGeneratedColumns.Count];
| autoGeneratedColumns.CopyTo(fields, 0);
| }
| else
| {
| fields = new DataControlField[Columns.Count];
| Columns.CopyTo(fields, 0);
| }
|
| TableRowCollection newRows = table.Rows;
| if (ShowHeaderWhenEmpty)
| {
| // create a new header row
| _headerRow = CreateRow(-1, -1,
| DataControlRowType.Header, DataControlRowState.Normal);
| InitializeRow(_headerRow, fields, newRows);
| }
|
| //// create the empty row
| GridViewRow emptyRow = new GridViewRow(-1, -1,
| DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
| TableCell cell = new TableCell();
| cell.ColumnSpan = fields.Length;
| cell.Width = Unit.Percentage(100);
| //
| if (EmptyDataTemplate != null)
| {
| EmptyDataTemplate.InstantiateIn(cell);
| }
| else if (!string.IsNullOrEmpty(EmptyDataText))
| //else if (!string.IsNullOrEmpty(EmptyDataText) &&
| MyPrj.SNF.Web.Utils.Utils.InReadMode())
| {
| cell.Controls.Add(new LiteralControl(EmptyDataText));
| }
| emptyRow.Cells.Add(cell);
| GridViewRowEventArgs e = new
GridViewRowEventArgs(emptyRow);
| OnRowCreated(e);
| newRows.Add(emptyRow);
| emptyRow.DataBind();
| OnRowDataBound(e);
| emptyRow.DataItem = null;
| if (ShowFooterWhenEmpty &&
| !MyPrj.SNF.Web.Utils.Utils.InReadMode())
| {
| // create footer row
| _footerRow = CreateRow(-1, -1,
| DataControlRowType.Footer, DataControlRowState.Normal);
| InitializeRow(_footerRow, fields, newRows);
| }
| }
| return rows;
| }
| #endregion
| #region protected override void Render()
| protected override void Render(HtmlTextWriter writer)
| {
| if (DataSource != null && GridMode == GridViewMode.Editable)
| {
| IList listRows = DataSource as IList;
| int rowIndex = 0;
| string itemCountHiddenField = "<input type=\"hidden\"
| name=\"" + this.PropertyName + "Count" + "\" id=\"" + this.PropertyName +
| "Count" + "\" value=\"" + listRows.Count.ToString() + "\" />";
| writer.WriteLine(itemCountHiddenField);
| foreach (MyPrj.SNF.Model.IDomainObject domainObject in
| listRows)
| {
| foreach (GridViewColumnMetaData columnMetaData in
| MetaData.Columns)
| {
| object propValue =
| Utils.Utils.GetPropertyValue(domainObject, columnMetaData.PropertyName);
| string propertyValue = string.Empty;
| if (propValue != null)
| propertyValue = propValue.ToString();
| // Replace line breaks with a single space
| // Escape Double Quotes & backslashes so the
value
| can be put safely into the array and hidden fields
| propertyValue = propertyValue.Replace("\r\n", "
| ").Replace(@"\", @"\\").Replace(@"""", "\\\"");
|
|
| string hiddenFieldId = (PropertyName + "_" +
| rowIndex + "_" + columnMetaData.PropertyName);
| string hiddenFieldToRender = "<input
type=\"hidden\"
| name=\"" + hiddenFieldId + "\" id=\"" + hiddenFieldId + "\" value=\"" +
| propertyValue + "\" />";
| writer.WriteLine(hiddenFieldToRender);
| }
| rowIndex++;
| }
| }
| base.Render(writer);
| RenderHiddenFieldsForActions();
| }
| #endregion
| #region protected override void LoadControlState()
| /// <summary>
| /// Manages the Sort information.
| /// </summary>
| /// <param name="savedState"></param>
| protected override void LoadControlState(object savedState)
| {
| object[] states = (object[])savedState;
| base.LoadControlState(states[0]);
|
| CSSortExpression = (string)states[1];
| CSSortDirection =
| (MyPrj.SNF.Application.SortDirection)states[2];
| }
| #endregion
| #region protected override object SaveControlState()
| protected override object SaveControlState()
| {
| object[] states = new object[3];
| states[0] = base.SaveControlState();
|
| states[1] = CSSortExpression;
| states[2] = CSSortDirection;
|
| return states;
| }
| #endregion
| protected override void OnDataBinding(EventArgs e)
| {
| DataSource = Utils.Utils.GetPropertyValue(PropertyName) as
| IList;
| addColumns();
| base.OnDataBinding(e);
| }
| protected override void OnRowCreated(GridViewRowEventArgs e)
| {
| if (e.Row.DataItem != null && e.Row.RowType ==
| DataControlRowType.DataRow)
| {
| object isRowDeleted =
| Utils.Utils.GetPropertyValue((IDomainObject)e.Row.DataItem,
| "HasBeenDeleted");
| addRowEvents(e.Row, (bool)isRowDeleted);
| }
|
| #region Add footer row events
| if (MetaData != null && EditIndex < 0 && e.Row.RowType ==
| DataControlRowType.Footer)
| {
| foreach (GridViewActionInfo actionInfo in MetaData.Actions)
| {
| System.Web.UI.WebControls.LinkButton lb = new
| System.Web.UI.WebControls.LinkButton();
| if (actionInfo.EventLocation ==
| GridViewActionInfo.EventLocationCode.FooterRow)
| {
| lb.Text = actionInfo.DisplayName;
| lb.ID = "lnk" + this.ID + actionInfo.EventName;
| lb.CommandName = actionInfo.CommandType.ToString();
| lb.CausesValidation = actionInfo.CausesValidation;
| lb.ValidationGroup = this.ID;
| lb.OnClientClick = getGridEventOnClickString(e.Row, lb,
| true, 0, actionInfo.CausesValidation,
actionInfo.ClientSideEventHandlerName,
| actionInfo.ActionParameters);
| lb.Attributes.Add("href", "#");
| addActionCell(e.Row, lb);
| TableHeaderCell c = new TableHeaderCell();
| c.Text = "";
| HeaderRow.Cells.Add(c);
| }
| }
| }
| #endregion
|
| base.OnRowCreated(e);
| }
| #region Delegated Events
|
| #region void EditableGrid_RowEditing(object sender,
GridViewEditEventArgs
| e)
| void EditableGrid_RowEditing(object sender, GridViewEditEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = e.NewEditIndex;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowDeleting(object sender,
| GridViewDeleteEventArgs e)
| void EditableGrid_RowDeleting(object sender, GridViewDeleteEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems = Activator.CreateInstance(domainObjectType);
| Array dataSourceItems = DataSource as Array;
| objItems = dataSourceItems.GetValue(e.RowIndex);
| Array updatedItems = getUpdatedItems((IList)DataSource, objItems,
| domainObjectType, e.RowIndex, "HasBeenDeleted", true);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowUpdating(object sender,
| GridViewUpdateEventArgs e)
| void EditableGrid_RowUpdating(object sender, GridViewUpdateEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems = Activator.CreateInstance(domainObjectType);
| foreach (System.Web.UI.Control c in
| this.Rows[e.RowIndex].Controls)
| {
| //First level is table cell level.. we need to go one
more
| level..
| if (c is DataControlFieldCell && c.Controls.Count > 0)
| {
| System.Web.UI.Control ec = c.Controls[0] as
| System.Web.UI.Control;
| setEachControlValues(ec, objItems);
| }
| }
|
| Array updatedItems = getUpdatedItems((IList)DataSource,
| objItems, domainObjectType, e.RowIndex, "HasBeenEdited", true);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowCommand(object sender,
| GridViewCommandEventArgs e)
| void EditableGrid_RowCommand(object sender, GridViewCommandEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| #region -- insert new row code here
|
| if (e.CommandName.Equals("Add"))
| {
| //Here we have to get each item value from the controls.
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
| Activator.CreateInstance(domainObjectType);
| foreach (System.Web.UI.Control c in
this.FooterRow.Controls)
| {
| //First level is table cell level.. we
| //need to go one more level..
| if (c.GetType().Name == "DataControlFieldCell" &&
| c.Controls.Count > 0)
| {
| System.Web.UI.Control ec = c.Controls[0] as
| System.Web.UI.Control;
| setEachControlValues(ec, objItems);
| }
| }
|
| Array addedItems = getAddedItems((IList)DataSource,
| objItems);
| setPropertyArrayValue(addedItems);
| this.DataSource = addedItems as IList;
| this.DataBind();
| }
|
| #endregion
|
| #region -- restore rows here
|
| if (e.CommandName.Equals("Restore"))
| {
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
| Activator.CreateInstance(domainObjectType);
| Array dataSourceItems = DataSource as Array;
| objItems =
| dataSourceItems.GetValue(Convert.ToInt32(e.CommandArgument));
| Array updatedItems = getUpdatedItems((IList)DataSource,
| objItems, domainObjectType, Convert.ToInt32(e.CommandArgument),
| "HasBeenDeleted", false);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
|
| #endregion
| }
| #endregion
| #region void EditableGrid_RowCancelingEdit(object sender,
| GridViewCancelEditEventArgs e)
| void EditableGrid_RowCancelingEdit(object sender,
| GridViewCancelEditEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_Sorting(object sender,
| GridViewSortEventArgs e)
| void EditableGrid_Sorting(object sender, GridViewSortEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| MyPrj.SNF.Web.Controller.RequestContext CurrentRequestContext
=
| Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
| MyPrj.SNF.Web.Controller.RequestContext;
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| CurrentRequestContext.CurrentControllerData;
|
| if (CSSortExpression !=
| ((GridViewSortEventArgs)e).SortExpression)
| CSSortDirection =
| MyPrj.SNF.Application.SortDirection.Ascending;
| else
| CSSortDirection = (CSSortDirection ==
| MyPrj.SNF.Application.SortDirection.Descending) ?
| MyPrj.SNF.Application.SortDirection.Ascending :
| MyPrj.SNF.Application.SortDirection.Descending;
|
| CSSortExpression = ((GridViewSortEventArgs)e).SortExpression;
| Array.Sort(DataSource as Array, new
| MyPrj.SNF.Application.ClassComparer(CSSortExpression, CSSortDirection));
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_PageIndexChanged(object sender,
EventArgs
| e)
| void EditableGrid_PageIndexChanged(object sender, EventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| bool displayLastPage = false;
| //try
| //{
| if (((GridViewPageEventArgs)e).NewPageIndex > -1)
| PageIndex = ((GridViewPageEventArgs)e).NewPageIndex;
| else
| displayLastPage = true;
| IList list = DataSource as IList;
| if (displayLastPage)
| PageIndex = (int)Math.Ceiling(((double)list.Count /
| PageSize)) - 1;
| this.DataBind();
| //}
| //catch (Exception expGeneral)
| //{
| // throw;
| //}
| }
|
| #endregion
|
| #endregion
| #endregion
|
| #region void addColumns()
|
| private void addColumns()
| {
| if (MetaData == null)
| MetaData =
GridViewMetaData.GetGridViewMetaData(MetaDataId);
| Columns.Clear();
|
| #region - all the controls
|
| foreach (GridViewColumnMetaData columnMetaData in
| MetaData.Columns)
| {
|
| if (columnMetaData.IsDisplayed)
| {
| TemplateField columnField = new TemplateField();
| columnField.HeaderText = columnMetaData.HeaderText;
| if (columnMetaData.IsSortable)
| columnField.SortExpression =
| columnMetaData.SortPropertyName;
| columnField.ItemStyle.HorizontalAlign =
| columnMetaData.HorizontalAlign;
| columnField.ItemStyle.Width = columnMetaData.Width;
|
| if (GridMode == GridViewMode.Editable)
| {
| columnField.ItemTemplate = new
| GridViewTemplate(ListItemType.Item, MetaData, columnMetaData, this.ID);
| columnField.EditItemTemplate = new
| GridViewTemplate(ListItemType.EditItem, MetaData, columnMetaData,
this.ID);
|
| if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
| this.EditIndex < 0)
| {
| columnField.FooterTemplate = new
| GridViewTemplate(ListItemType.Footer, MetaData, columnMetaData, this.ID);
| }
| }
| //Add the newly created bound field to the GridView.
| Columns.Add(columnField);
| }
| }
|
| #endregion
|
| #region ------- add check box to each row if render selection
is
| specified
|
|
| if ((MetaData.ShowSelectionInReadMode &&
| MyPrj.SNF.Web.Utils.Utils.InReadMode()) ||
| (MetaData.ShowSelectionInEditableMode &&
| !MyPrj.SNF.Web.Utils.Utils.InReadMode()))
| {
| GridViewColumnMetaData gvMetaData = new
| GridViewColumnMetaData(MetaData.SelectionPropertyName, "Select", false);
| gvMetaData.ColumnType = "DomainObjectSelection";
| TemplateField selectionField = new TemplateField();
| selectionField.ItemTemplate = new
| GridViewTemplate(ListItemType.EditItem, MetaData, gvMetaData, this.ID);
| Columns.Add(selectionField);
| }
|
| #endregion
|
| }
|
|
|
| #endregion
|
| #region private string getControlIndex()
| private string getControlIndex(bool isFooterRow, int dataRowIndex)
| {
| //This is not a real code......????
| //what do i do if there is no option..
| string controlIndex = "";
| int startCount = 0;
|
| if (isFooterRow)
| {
| startCount = 3;
| if (Rows.Count > 1)
| startCount = 3 + (Rows.Count - 1);
|
| if (startCount < 10)
| controlIndex = "$ctl0" + startCount.ToString() + "$";
| else
| controlIndex = "$ctl" + startCount.ToString() + "$";
| }
| else
| {
| startCount = 2 + dataRowIndex;
| if (startCount < 10)
| controlIndex = "$ctl0" + startCount.ToString() + "$";
| else
| controlIndex = "$ctl" + startCount.ToString() + "$";
| }
|
| return controlIndex;
| }
| #endregion
|
| #region private void addRowEvents(GridViewRow gr)
| private void addRowEvents(GridViewRow gr, bool isDeleted)
| {
|
| System.Web.UI.WebControls.LinkButton lb = new
| System.Web.UI.WebControls.LinkButton();
| if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
| ShowGridViewEditButtons)
| {
|
| #region //first add the data row events
|
| foreach (GridViewActionInfo actionInfo in
MetaData.Actions)
| {
| if (actionInfo.EventLocation ==
| GridViewActionInfo.EventLocationCode.DataRow)
| {
| lb = new System.Web.UI.WebControls.LinkButton();
| lb.ID = "lnk" + this.ID + actionInfo.EventName;
| lb.Text = actionInfo.DisplayName;
| lb.CommandName =
actionInfo.CommandType.ToString();
| lb.ValidationGroup = this.ID;
| lb.CausesValidation = actionInfo.CausesValidation;
| lb.Attributes.Add("href", "#");
| lb.OnClientClick = getGridEventOnClickString(gr,
lb,
| false, gr.RowIndex, actionInfo.CausesValidation,
| actionInfo.ClientSideEventHandlerName, actionInfo.ActionParameters);
|
|
| if (actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.SNF)
| lb.OnClientClick =
| getSNFOnclickString(actionInfo, gr);
| else if (isDeleted && actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.Restore)
| {
| //If its deleted row then just show the
restore
| event and return
| removeActionCell(gr);
| //set the deleted row css class
| gr.CssClass = RemovedItemCssClass;
| lb.CommandArgument = gr.RowIndex.ToString();
| addActionCell(gr, lb);
| addEmptyCell(gr);
| return;
| }
|
|
| bool addThis = false;
| if (EditIndex == gr.RowIndex &&
| (actionInfo.CommandType == GridViewActionInfo.CommandTypeCode.Update ||
| actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.Cancel))
| addThis = true;
| else if (EditIndex < 0 && EditIndex !=
gr.RowIndex
| && (actionInfo.CommandType != GridViewActionInfo.CommandTypeCode.Update &&
| actionInfo.CommandType !=
| GridViewActionInfo.CommandTypeCode.Cancel && actionInfo.CommandType !=
| GridViewActionInfo.CommandTypeCode.Restore))
| addThis = true;
|
| if (addThis)
| addActionCell(gr, lb);
|
| }
| }
|
| #endregion
|
|
| #region //Add header row for the event
|
| TableHeaderCell c = new TableHeaderCell();
| c.Text = "";
| HeaderRow.Cells.Add(c);
|
| #endregion
|
| }
| }
| #endregion
|
| #region protected void RenderHiddenFieldsForActions()
| protected void RenderHiddenFieldsForActions()
| {
| if (MetaData == null || MetaData.Actions == null ||
| MetaData.Actions.Count < 1 || DataSource == null ||
| ((IList)DataSource).Count == 0)
| return;
|
| Hashtable hiddenFieldIds = new Hashtable();
| foreach (GridViewActionInfo actionInfo in MetaData.Actions)
| {
| if (actionInfo.ActionParameters != null)
| {
| foreach (string argumentName in
| actionInfo.ActionParameters.AllKeys)
| {
| if
| (!hiddenFieldIds.ContainsKey(actionInfo.ActionParameters[argumentName]))
|
hiddenFieldIds[actionInfo.ActionParameters[argumentName]]
| = null;
| }
| }
| }
| foreach (string hiddenFieldId in hiddenFieldIds.Keys)
| {
| // Add the Hidden Field only if the page doesn't already
| contain a control with same ID
| if (!Utils.Utils.IsControlOnPage(Page, hiddenFieldId))
| {
| //For ajax postback we will have to register the
hidden
| fields
| ScriptManager sm = ScriptManager.GetCurrent(Page);
| if (sm != null && sm.IsInAsyncPostBack)
|
System.Web.UI.ScriptManager.RegisterHiddenField(this,
| hiddenFieldId, string.Empty);
| else
|
Page.ClientScript.RegisterHiddenField(hiddenFieldId,
| string.Empty);
| }
| }
| }
| #endregion
|
| #region private string getSNFOnclickString(GridViewActionInfo
| actionInfo,GridViewRow gr)
| private string getSNFOnclickString(GridViewActionInfo actionInfo,
| GridViewRow gr)
| {
| System.Text.StringBuilder sb = new
System.Text.StringBuilder();
| if (actionInfo.ActionParameters != null &&
| actionInfo.ActionParameters.Count > 0)
| {
| Type gridType = gr.DataItem.GetType();
| List<string> parameters = new List<string>();
| foreach (string propertyName in actionInfo.ActionParameters.AllKeys)
| {
| if (actionInfo.ActionParameters[propertyName] != null)
| {
| string controlId =
| actionInfo.ActionParameters[propertyName];
| object propertyValue =
| gridType.GetProperty(propertyName).GetValue(gr.DataItem, null);
| if (PropertyUtilities.IsNullValue(propertyValue))
| propertyValue = string.Empty;
|
| parameters.Add(controlId + "~" + propertyValue);
| }
| }
| object[] args = new object[] { "this",
actionInfo.EventName,
| actionInfo.ClientSideEventHandlerName, string.Join("-",
| parameters.ToArray()), gr.RowIndex };
| return
|
string.Format("processGridViewEvent(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\")
",
| args);
| }
| return string.Empty;
| }
| #endregion
|
| #region private string getGridEventOnClickString()
| private string getGridEventOnClickString(GridViewRow gridRow,
| System.Web.UI.WebControls.LinkButton lb, bool isFooterRow, int
dataRowIndex,
| bool causeValidation, string clientSideEventHandlerName,
NameValueCollection
| actionParameters)
| {
| string validationGroup = "donotValidate";
| if (causeValidation)
| validationGroup = ID;
|
| string uniqId = this.UniqueID + getControlIndex(isFooterRow,
| dataRowIndex) + lb.UniqueID;
| if (!string.IsNullOrEmpty(clientSideEventHandlerName))
| {
| List<string> parameters = new List<string>();
| parameters.Add("''");
| if (actionParameters != null && actionParameters.Count > 0)
| {
| parameters.Clear();
| Type gridType = gridRow.DataItem.GetType();
| foreach (string propertyName in actionParameters.AllKeys)
| {
| if (actionParameters[propertyName] != null)
| {
| string controlId = actionParameters[propertyName];
| object propertyValue =
| gridType.GetProperty(propertyName).GetValue(gridRow.DataItem, null);
| if (PropertyUtilities.IsNullValue(propertyValue))
| propertyValue = string.Empty;
| parameters.Add(controlId + "~" + propertyValue);
| }
| }
| }
|
| return string.Format("return
|
handleThenFireButtonEvent(\"{0}\",\"{1}\",\"{2}\",{3},\"{4}\",\"{5}\",\"{6}\
",\"{7}\",\"{8}\")",
| "this", GridPostbackEvent, clientSideEventHandlerName, "true",
| string.Join("-", parameters.ToArray()), validationGroup, uniqId,
| lb.CommandArgument, UpdatePanelId);
| }
| object[] args = new object[] { };
| return string.Format("return
|
validateAndFireButtonEventGroup(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\",\"{5
}\")",
| "this", GridPostbackEvent, validationGroup, uniqId, lb.CommandArgument,
| UpdatePanelId);
| }
| #endregion
|
| #region private TableRow addActionCell()
| private void addActionCell(GridViewRow gr,
| System.Web.UI.WebControls.LinkButton lb)
| {
| System.Web.UI.WebControls.TableCell tc = new TableCell();
| tc.Controls.Add(lb);
| ((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
| }
| #endregion
|
| #region private TableRow addEmptyCell()
| private void addEmptyCell(GridViewRow gr)
| {
| System.Web.UI.WebControls.TableCell tc = new TableCell();
| tc.Text = "&nbsp;&nbsp;";
| ((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
| }
| #endregion
|
| #region private void removeActionCell()
| private void removeActionCell(GridViewRow gr)
| {
| TableCell[] tmpcell = new TableCell[gr.Cells.Count];
| gr.Cells.CopyTo(tmpcell, 0);
| foreach (TableCell c in tmpcell)
| {
| System.Web.UI.Control ctrl = new System.Web.UI.Control();
| if (c.Controls.Count > 0)
| ctrl = c.Controls[0];
| if (ctrl != null && ctrl.GetType().Name == "LinkButton")
| gr.Cells.Remove(c);
| }
|
| }
| #endregion
|
| #region private void setEachControlValues()
| private void setEachControlValues(System.Web.UI.Control ec,
object
| objItems)
| {
| switch (ec.GetType().Name)
| {
| case "TextBox":
| TextBox ctrlText = (TextBox)ec;
| setControlValue(ctrlText.ID, ctrlText.Text, objItems);
| break;
| case "HiddenField":
| HiddenField ctrl = (HiddenField )ec;
| setControlValue(ctrl.ID, ctrl.Value, objItems);
| break;
| case "DateBox":
| DateBox ctrlDB = (DateBox)ec;
| setControlValue(ctrlDB.ID, ctrlDB.Text, objItems);
| break;
| case "DateTimeBox":
| DateTimeBox ctrlDTB = (DateTimeBox)ec;
| setControlValue(ctrlDTB.ID, ctrlDTB.Text, objItems);
| break;
| case "CheckBox":
| CheckBox ctrlCheck = (CheckBox)ec;
| string valueToSet = "N";
| if (ctrlCheck.Checked)
| valueToSet = "Y";
| setControlValue(ctrlCheck.ID, valueToSet, objItems);
| break;
| case "DropDownList":
| DropDownList ctrldrp = (DropDownList)ec;
| setControlValue(ctrldrp.ID, ctrldrp.SelectedValue,
| objItems);
| break;
| //also needs to set the ctrldrp.Text to the label control
| //in the Items templates
| case "RadioButtonList":
| RadioButtonList ctrlRdo = (RadioButtonList)ec;
| setControlValue(ctrlRdo.ID, ctrlRdo.SelectedValue,
| objItems);
| break;
| case "Label":
| Label ctrlLabel = (Label)ec;
| setControlValue(ctrlLabel.ID, ctrlLabel.Text,
objItems);
| break;
| }
|
| }
|
| #endregion
|
| #region public GridViewMetaData MetaData
| private GridViewMetaData _MetaData;
| public GridViewMetaData MetaData
| {
| get { return _MetaData; }
| set { _MetaData = value; }
| }
| #endregion
|
| #region public string DomainObjectName
| private string _domainObjectName;
| public string DomainObjectName
| {
| get { return _domainObjectName; }
| set { _domainObjectName = value; }
| }
| #endregion
|
| #region public string DomainObjectListKey
| private string _DomainObjectListKey;
| public string DomainObjectListKey
| {
| get { return _DomainObjectListKey; }
| set { _DomainObjectListKey = value; }
| }
| #endregion
|
| #region public string MetaDataId
| private string _MetaDataId;
| public string MetaDataId
| {
| get { return _MetaDataId; }
| set { _MetaDataId = value; }
| }
| #endregion
|
| #region public string GridPostbackEvent
| private string _GridPostbackEvent;
| public string GridPostbackEvent
| {
| get { return _GridPostbackEvent; }
| set { _GridPostbackEvent = value; }
| }
| #endregion
|
| #region public bool BypassGridEvent
| private bool _BypassGridEvent = false;
| public bool BypassGridEvent
| {
| get { return _BypassGridEvent; }
| set { _BypassGridEvent = value; }
| }
| #endregion
|
| #region public bool ShowGridViewEditButtons
| private bool _ShowGridViewEditButtons;
| public bool ShowGridViewEditButtons
| {
| get { return _ShowGridViewEditButtons; }
| set { _ShowGridViewEditButtons = value; }
| }
| #endregion
|
| #region public string PropertyName
| private string _PropertyName = string.Empty;
| public string PropertyName
| {
| get { return _PropertyName; }
| set { _PropertyName = value; }
| }
| #endregion
|
| #region private Array getAddedItems()
| private Array getAddedItems(IList oldList, object addedItems)
| {
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| int arrayLength = 1;
| if (oldList != null && oldList.Count > 0)
| arrayLength = oldList.Count + 1;
| Array arrayItems = Array.CreateInstance(addedItems.GetType(),
| arrayLength);
| int i = 0;
| if (oldList != null && oldList.Count > 0)
| {
| foreach (IDomainObject dm in oldList)
| {
| arrayItems.SetValue(dm, i);
| i++;
| }
| }
| arrayItems.SetValue(addedItems, i);
| return arrayItems;
| }
| #endregion
|
| #region private Array getUpdatedItems()
| private Array getUpdatedItems(IList oldList, object updatedItems,
| Type domainObjectType, int rowIndex, string propertyToUpdate, bool value)
| {
| //Also set the HasBeenEdited/HasBeenDeleted field with the
value
| true/false..
| setControlValue(propertyToUpdate, value, updatedItems);
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| Array arrayItems = Array.CreateInstance(domainObjectType,
| oldList.Count);
| int i = 0;
| foreach (IDomainObject dm in oldList)
| {
| if (i == rowIndex)//if the row index match the current object then
| replace the displayed column's values with the updated one
| {
| foreach (GridViewColumnMetaData columnMetaData in MetaData.Columns)
| {
| if (columnMetaData.IsDisplayed)
| {
| PropertyUtilities.SetValue(dm, columnMetaData.PropertyName,
| PropertyUtilities.GetValue((IDomainObject)updatedItems,
| columnMetaData.PropertyName));
| }
| }
| }
| // also set hasbeenEdited/hasbeenDeleted with true/false
| setControlValue(propertyToUpdate, value, dm);
| arrayItems.SetValue(dm, i);
| i++;
| }
| return arrayItems;
| }
| #endregion
|
| #region private Array getRemovedItems()
| private Array getRemovedItems(IList oldList, object removedItems,
| int rowIndex)
| {
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| Array arrayItemsToCopy =
| Array.CreateInstance(removedItems.GetType(), oldList.Count);
| Array arrayItems =
Array.CreateInstance(removedItems.GetType(),
| oldList.Count - 1);
| int i = 0;
| foreach (IDomainObject dm in oldList)
| {
| if (i != rowIndex)//if the row index match the current
| object then remove it(do not add to list)
| arrayItemsToCopy.SetValue(dm, i);
| i++;
| }
|
| int newArrayCount = 0;
| for (int j = 0; j < arrayItemsToCopy.Length; j++)
| {
| if (arrayItemsToCopy.GetValue(j) != null)
| {
| arrayItems.SetValue(arrayItemsToCopy.GetValue(j),
| newArrayCount);
| newArrayCount++;
| }
| }
|
| return arrayItems;
| }
| #endregion
|
| #region private void setControlValue()
| private void setControlValue(string propertyName, object value,
| object dObject)
| {
| PropertyInfo pi = null;
| pi = dObject.GetType().GetProperty(propertyName);
| SNF.Model.PropertyUtilities.SetValue((IDomainObject)dObject,
pi,
| value);
|
| }
| #endregion
|
| #region private void setPropertyArrayValue()
| private void setPropertyArrayValue(Array arrayItems)
| {
|
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| IDomainObject domainObject =
CurrentControllerData.DomainObject;
| PropertyInfo pi =
| domainObject.GetType().GetProperty(PropertyName);
| pi.SetValue(domainObject, arrayItems, null);
| }
| #endregion
|
| #region private void ProcessControllerEvent()
| private void ProcessControllerEvent(string eventName)
| {
| // Process the current event
|
| MyPrj.SNF.Web.Controller.RequestContext CurrentRequestContext
=
| Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
| MyPrj.SNF.Web.Controller.RequestContext;
| MyPrj.SNF.Web.Controller.ControllerData CurrentControllerData
=
| CurrentRequestContext.CurrentControllerData;
| CurrentControllerData.EventName = eventName;
|
| MyPrj.SNF.Web.Controller.ProcessResult pr =
| MyPrj.SNF.Web.Controller.EventProcessor.ProcessEvent(
| CurrentRequestContext, CurrentControllerData.StateId,
| CurrentControllerData.EventName);
|
| CurrentControllerData.EventName = pr.EventName; // Capture
the
| EventName from the result;
| }
| #endregion
|
| #region private void addAjaxSupport()
| private void addAjaxSupport(bool add)
| {
| ScriptManager
| sm = ScriptManager.GetCurrent(Page);
| if (sm == null)
| throw new HttpException("A ScriptManager control must
exist
| on the current page.");
| UpdatePanel updatePanel = new UpdatePanel();
| updatePanel.UpdateMode = UpdatePanelUpdateMode.Conditional;
| updatePanel.ID = "updatePanel" + this.ID;
| updatePanel.ContentTemplateContainer.Controls.Add(this);
| this.Controls.Add(updatePanel);
| }
| #endregion
|
| #region -- section to show/hide empty header and footer rows
|
| private GridViewRow _headerRow;
| private GridViewRow _footerRow;
|
| private bool _showHeaderWhenEmpty;
| private bool _showFooterWhenEmpty;
|
| public bool ShowHeaderWhenEmpty
| {
| get { return _showHeaderWhenEmpty; }
| set { _showHeaderWhenEmpty = value; }
| }
|
| public bool ShowFooterWhenEmpty
| {
| get { return _showFooterWhenEmpty; }
| set { _showFooterWhenEmpty = value; }
| }
|
| public override GridViewRow HeaderRow
| {
| get { return base.HeaderRow ?? _headerRow; }
| }
|
| public override GridViewRow FooterRow
| {
| get { return base.FooterRow ?? _footerRow; }
| }
|
| private void InitializeRow(GridViewRow row, DataControlField[]
| fields, TableRowCollection newRows)
| {
| GridViewRowEventArgs e = new GridViewRowEventArgs(row);
| InitializeRow(row, fields);
| OnRowCreated(e);
| newRows.Add(row);
| row.DataBind();
| OnRowDataBound(e);
| row.DataItem = null;
| }
|
| #endregion
|
| #region protected void SetupStyleAndBehaviour ()
| protected virtual void SetupStyleAndBehaviour()
| {
| EnableViewState = false;
| AutoGenerateColumns = false;
|
| AllowSorting = true;
| AllowPaging = true;
| EnableSortingAndPagingCallbacks = false;
| AutoGenerateSelectButton = false;
| AutoGenerateDeleteButton = false;
| AutoGenerateEditButton = false;
|
| ShowHeader = true;
| ShowFooter = true;
| EmptyDataText = "No records found";
|
| CssClass = "grid";
| CellPadding = 3;
| CellSpacing = 0;
| GridLines = GridLines.Horizontal;
|
| PageSize = 20;
| PagerStyle.CssClass = "gridPager";
| PagerSettings.FirstPageText = "<<";
| PagerSettings.PreviousPageText = "<";
| PagerSettings.NextPageText = ">";
| PagerSettings.LastPageText = ">>";
| PagerSettings.PageButtonCount = 10;
| PagerSettings.Mode = PagerButtons.NumericFirstLast;
|
| RowStyle.CssClass = "gridRow";
| SelectedRowStyle.CssClass = "gridSelectedRow";
| HeaderStyle.CssClass = "gridViewHeader";
| FooterStyle.CssClass = "gridfooter";
| AlternatingRowStyle.CssClass = "gridAlternatingRow";
| RemovedItemCssClass = "gridDeletedRow";
| }
| #endregion
|
| #region public GridViewMode GridMode
| private GridViewMode _GridMode = GridViewMode.Editable;
| /// <summary>
| ///
| /// </summary>
| public GridViewMode GridMode
| {
| get { return _GridMode; }
| set { _GridMode = value; }
| }
| #endregion
|
| #region Custom Management of SortExpression & SortDirection
|
| #region public string CSSortExpression
| private string _CSSortExpression;
| public string CSSortExpression
| {
| get { return _CSSortExpression; }
| set { _CSSortExpression = value; }
| }
| #endregion
|
| #region public SortDirection CSSortDirection
| private MyPrj.SNF.Application.SortDirection _CSSortDirection;
| public MyPrj.SNF.Application.SortDirection CSSortDirection
| {
| get { return _CSSortDirection; }
| set { _CSSortDirection = value; }
| }
| #endregion
|
| #endregion Custom Management of SortExpression & SortDirection
|
| #region public string RemovedItemCssClass
| private string _RemovedItemCssClass;
| public string RemovedItemCssClass
| {
| get { return _RemovedItemCssClass; }
| set { _RemovedItemCssClass = value; }
| }
| #endregion
|
| #region public string UpdatePanelId
| private string _UpdatePanelId;
| public string UpdatePanelId
| {
| get { return _UpdatePanelId; }
| set { _UpdatePanelId = value; }
| }
| #endregion
| }
| }
|
|
|
| | > hello, I have 2 new issues:
| >
| > 1. My control is overriding OnRowCreated and it calls
base.OnRowCreated
| > and on my aspx.cs page i am attaching an event handler to this
RowCreated
| > but it is not running. I also tried to add an event handler to
| > RowDataBound and calling base.OnRowDataBound and it doesnt get called
in
| > aspx.cs either.
| >
| > What could be the cause of this? I dont understand since i'm calling
base
| > implementation (which seeing the code thru reflector it calls any
attached
| > handlers)
| >
| > 2. This is related somehow to first point. As stated in the first
problem
| > you already resolved, i attached event handlers in my custom control
| > instead of overriding them and that caused my event handlers on aspx.cs
| > page to be called correctly for most of them. When i tried to attach
event
| > handler for RowCreated in custom control, it is not called, but when I
| > override OnRowCreated it is called. Even when I attached event handler
for
| > RowCreated in custom control AND aspx.cs page, neither were called. The
| > grid events that I am currently using successfully on aspx.cs are
| > RowUpdating and RowEditing, both of which are also attached event
handlers
| > in custom control.
| >
| > thanks
| >
| > | >> Hi,
| >>
| >> Do you have any further questions? If you have please provide some
code
| >> so
| >> that I can test it on my side.
| >>
| >> Regards,
| >> Allen Chen
| >> Microsoft Online Community Support
| >>
| >> --------------------
| >> | From: "TS" <[email protected]>
| >> | References: <#[email protected]>
| >> <#[email protected]>
| >> <[email protected]>
| >> <[email protected]>
| >> | Subject: Re: overriding GridView.OnRowDeleting - can call registered
| >> event handlers
| >> | Date: Wed, 22 Oct 2008 11:07:08 -0500
| >> | Lines: 223
| >> | X-Priority: 3
| >> | X-MSMail-Priority: Normal
| >> | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | X-RFC2646: Format=Flowed; Original
| >> | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | Message-ID: <[email protected]>
| >> | Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | NNTP-Posting-Host: 168.38.106.193
| >> | Path:
TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| >> | Xref: TK2MSFTNGHUB02.phx.gbl
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols:1142
| >> | X-Tomcat-NG:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> |
| >> | that did it, but for some reason the delegates for DataBinding was
not
| >> | getting called, but that method does call base.DataBind, so make it
| >> | overridable is OK, though not sure why it wasnt getting called
| >> |
| >> | | >> | > Hi,
| >> | >
| >> | > Thanks for your clarification. To achieve your requirement I would
| >> suggest
| >> | > you attach an event handler in the constructor method instead of
| >> | > overriding
| >> | > the OnRowDeleting method.
| >> | >
| >> | > public class MyGridView : GridView
| >> | > {
| >> | >
| >> | > public MyGridView()
| >> | > {
| >> | > this.RowDeleting += new
| >> | > GridViewDeleteEventHandler(MyGridView_RowDeleting);
| >> | > }
| >> | > void MyGridView_RowDeleting(object sender,
| >> GridViewDeleteEventArgs
| >> | > e)
| >> | > {
| >> | > //Your code here
| >> | > }
| >> | > }
| >> | >
| >> | > Please have a try and let me know if it's what you need.
| >> | >
| >> | > Regards,
| >> | > Allen Chen
| >> | > Microsoft Online Support
| >> | >
| >> | > --------------------
| >> | > | From: "TS" <[email protected]>
| >> | > | References: <#[email protected]>
| >> | > <#[email protected]>
| >> | > | Subject: Re: overriding GridView.OnRowDeleting - can call
| >> registered
| >> | > event handlers
| >> | > | Date: Tue, 21 Oct 2008 11:38:04 -0500
| >> | > | Lines: 136
| >> | > | X-Priority: 3
| >> | > | X-MSMail-Priority: Normal
| >> | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | > | X-RFC2646: Format=Flowed; Original
| >> | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | > | Message-ID: <[email protected]>
| >> | > | Newsgroups:
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | NNTP-Posting-Host: 168.38.106.193
| >> | > | Path:
| >> TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| >> | > | Xref: TK2MSFTNGHUB02.phx.gbl
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| >> | > | X-Tomcat-NG:
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > |
| >> | > | So it looks like the "else if" section of the posted code below
is
| >> | > getting
| >> | > | run, which throws an exception and this is why that
| >> base.OnRowDeleting
| >> | > is
| >> | > | commented out. Our custom OnRowDeleting does a lot of stuff in it
| >> that
| >> | > is
| >> | > | common to every grid. The only thing the base class does is call
| >> any
| >> | > | registered delegates. So if we dont add event handler in aspx
page
| >> for
| >> | > | onRowDeleting, the base class will throw this error.
| >> | > |
| >> | > | We want to not have to attach custom event handlers in every
aspx
| >> page
| >> | > that
| >> | > | uses the grid control and just let our custom gridView handle
all
| >> the
| >> | > | processing in all the grid events (onRowEditing, onRowUpdating,
| >> | > | onRowDeleting, etc.), but I need to be able to support
overriding
| >> this
| >> | > | behavior sometimes by adding a custom event handler in my aspx
| >> page.
| >> | > |
| >> | > | Could I override the each Event Handler's add/remove properties
so
| >> that
| >> | > i
| >> | > | can handle the Event[] collection myself and then i'll be able
to
| >> call
| >> | > the
| >> | > | individually registered delegates?
| >> | > | public event GridViewDeleteEventHandler RowDeleting
| >> | > |
| >> | > | {
| >> | > |
| >> | > | add
| >> | > |
| >> | > | {
| >> | > |
| >> | > | base.Events.AddHandler(EventRowDeleting, value);
| >> | > |
| >> | > | }
| >> | > |
| >> | > | remove
| >> | > |
| >> | > | {
| >> | > |
| >> | > | base.Events.RemoveHandler(EventRowDeleting, value);
| >> | > |
| >> | > | }
| >> | > |
| >> | > | }
| >> | > |
| >> | > |
| >> message
| >> | > | | >> | > | > Hi,
| >> | > | >
| >> | > | > As you said, it's a private field so we cannot access it in the
| >> custom
| >> | > | > GridView. I think we'd better focus on your following
statement:
| >> | > | >
| >> | > | > I have a custom GridView and it overrides onRowDeleting and
| >> doesn't
| >> | > | > call base.OnRowDeleting because the person implementing had
| >> | > undesirable
| >> | > | > effects.
| >> | > | >
| >> | > | > Could you tell me what're the undesirable effects and your
| >> requirement
| >> | > as
| >> | > | > well? I think if we can eliminate them this issue can be worked
| >> | > around.
| >> | > | >
| >> | > | > Regards,
| >> | > | > Allen Chen
| >> | > | > Microsoft Online Support
| >> | > | >
| >> | > | > Delighting our customers is our #1 priority. We welcome your
| >> comments
| >> | > and
| >> | > | > suggestions about how we can improve the support we provide to
| >> you.
| >> | > Please
| >> | > | > feel free to let my manager know what you think of the level of
| >> | > service
| >> | > | > provided. You can send feedback directly to my manager at:
| >> | > | > (e-mail address removed).
| >> | > | >
| >> | > | > ==================================================
| >> | > | > Get notification to my posts through email? Please refer to
| >> | > | >
| >> | >
| >>
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| >> | > | >
| >> | > | > Note: The MSDN Managed Newsgroup support offering is for
| >> non-urgent
| >> | > issues
| >> | > | > where an initial response from the community or a Microsoft
| >> Support
| >> | > | > Engineer within 1 business day is acceptable. Please note that
| >> each
| >> | > follow
| >> | > | > up response may take approximately 2 business days as the
support
| >> | > | > professional working with you may need further investigation to
| >> reach
| >> | > the
| >> | > | > most efficient resolution. The offering is not appropriate for
| >> | > situations
| >> | > | > that require urgent, real-time or phone-based interactions or
| >> complex
| >> | > | > project analysis and dump analysis issues. Issues of this
nature
| >> are
| >> | > best
| >> | > | > handled working with a dedicated Microsoft Support Engineer by
| >> | > contacting
| >> | > | > Microsoft Customer Support Services (CSS) at
| >> | > | >
| >> | >
| >>
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| >> | > | > ==================================================
| >> | > | > This posting is provided "AS IS" with no warranties, and
confers
| >> no
| >> | > | > rights.
| >> | > | >
| >> | > | > --------------------
| >> | > | > | From: "TS" <[email protected]>
| >> | > | > | Subject: overriding GridView.OnRowDeleting - can call
| >> registered
| >> | > event
| >> | > | > handlers
| >> | > | > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| >> | > | > | Lines: 24
| >> | > | > | X-Priority: 3
| >> | > | > | X-MSMail-Priority: Normal
| >> | > | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | > | > | X-RFC2646: Format=Flowed; Original
| >> | > | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | > | > | Message-ID: <#[email protected]>
| >> | > | > | Newsgroups:
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | > | NNTP-Posting-Host: 168.38.106.193
| >> | > | > | Path:
| >> | > TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| >> | > | > | Xref: TK2MSFTNGHUB02.phx.gbl
| >> | > | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| >> | > | > | X-Tomcat-NG:
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | > |
| >> | > | > | Hello, I have a custom GridView and it overrides
onRowDeleting
| >> and
| >> | > | > doesn't
| >> | > | > | call base.OnRowDeleting because the person implementing had
| >> | > undesirable
| >> | > | > | effects. the problem is I now when clients of this control
| >> register
| >> | > | > their
| >> | > | > | own event handlers for RowDeleting, it is never raised.
| >> | > | > |
| >> | > | > | I'm trying to add lines 1 - 5 to my overriden OnRowDeleting
| >> method
| >> | > but
| >> | > | > can't
| >> | > | > | because the key accessed in base.Events is EventRowDeleting,
| >> which
| >> | > is
| >> | > an
| >> | > | > | object that is a private constant that i dont have access to
in
| >> my
| >> | > | > derived
| >> | > | > | control.
| >> | > | > |
| >> | > | > | How do I get a handle to any event handlers so I can call
| >> them???
| >> | > | > |
| >> | > | > | // this is the dissasembled method for GridView:
| >> | > | > | protected virtual void OnRowDeleting(GridViewDeleteEventArgs
| >> e){
| >> | > | > bool
| >> | > | > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| >> | > | > | GridViewDeleteEventHandler handler =
| >> (GridViewDeleteEventHandler)
| >> | > | > | base.Events[EventRowDeleting];2 if (handler != null)3
{4
| >> | > | > | handler(this, e);5 } else if
(!isBoundUsingDataSourceID
| >> &&
| >> | > | > !e.Cancel)
| >> | > | > | { throw new
| >> | > | > HttpException(SR.GetString("GridView_UnhandledEvent",
| >> | > | > | new object[] { this.ID, "RowDeleting" })); }}
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | >
| >> | > |
| >> | > |
| >> | > |
| >> | >
| >> |
| >> |
| >> |
| >>
| >
| >
|
|
|
 
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T

TS

sent it today

Allen Chen said:
Hi,

Have you sent the demo to me?

Regards,
Allen Chen
Microsoft Online Support
--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Wed, 29 Oct 2008 11:08:23 -0500
| Lines: 1559
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Response
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.113
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP05.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1147
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| I see now that all the events get raised when I click one of the grid's
| buttons to fire Edit, Update, etc. So on default data binding of the
grid,
| on just load of the page, the events are not getting raised. Sounds like
| something is missing from the control's code:
|
| using System;
| using System.Collections;
| using System.Collections.Specialized;
| using System.Collections.Generic;
| using System.Web.UI.WebControls;
| using System.Web.UI;
| using System.Reflection;
| using MyPrj.SNF.Model;
| using MyPrj.SNF.Application;
| using System.Data;
| using System.Web;
| /// <summary>
| /// Summary description for EditableGrid
| /// </summary>
|
| namespace MyPrj.SNF.Web.Control
| {
|
| public class EditableGrid : System.Web.UI.WebControls.GridView
| {
| public EditableGrid()
| {
| //
| // TODO: Add constructor logic here
| //
| ShowFooter = true;
| ShowHeader = true;
| ShowFooterWhenEmpty = true;
| ShowHeaderWhenEmpty = true;
| ShowGridViewEditButtons = true;
| GridPostbackEvent = "GridReload";
| EmptyDataText = "No Records Found";
| EnableViewState = false;
| SetupStyleAndBehaviour();
| }
|
| #region Events
| #region protected override void OnLoad(EventArgs e)
| protected override void OnLoad(EventArgs e)
| {
| base.OnLoad(e);
| #region Add Delegates for all grid events
| // Add delegates instead of overriding for all the grid events that
dont
| need to call base's implementation, otherwise
| // every aspx page would have to have a delegate for each grid event
that
| was supported for that grid on that page
|
| // Note: do in OnLoad so that the individual aspx pages can also do
this
| in their OnLoad and have their events
| // run first so that the BypassGridEvent flag can be set to true to
| bypass execution here.
| this.RowCommand += new
| GridViewCommandEventHandler(EditableGrid_RowCommand);
| this.RowEditing += new
GridViewEditEventHandler(EditableGrid_RowEditing);
| this.RowCancelingEdit += new
| GridViewCancelEditEventHandler(EditableGrid_RowCancelingEdit);
| this.RowUpdating += new
| GridViewUpdateEventHandler(EditableGrid_RowUpdating);
| this.RowDeleting += new
| GridViewDeleteEventHandler(EditableGrid_RowDeleting);
| this.Sorting += new GridViewSortEventHandler(EditableGrid_Sorting);
| this.PageIndexChanged += new
EventHandler(EditableGrid_PageIndexChanged);
| #endregion
| }
| #endregion
| #region protected override int CreateChildControls(IEnumerable
dataSource,
| bool dataBinding)
| protected override int CreateChildControls(IEnumerable dataSource,
bool
| dataBinding)
| {
| int rows = base.CreateChildControls(dataSource,
dataBinding);
|
| // no data rows created, create empty table if enabled
| if (rows == 0 && (ShowFooterWhenEmpty ||
ShowHeaderWhenEmpty))
| {
| // create the table
| Table table = CreateChildTable();
| Controls.Clear();
| Controls.Add(table);
| DataControlField[] fields;
| if (AutoGenerateColumns)
| {
| PagedDataSource source = new PagedDataSource();
| source.DataSource = dataSource;
| ICollection autoGeneratedColumns =
CreateColumns(source,
| true);
| fields = new
| DataControlField[autoGeneratedColumns.Count];
| autoGeneratedColumns.CopyTo(fields, 0);
| }
| else
| {
| fields = new DataControlField[Columns.Count];
| Columns.CopyTo(fields, 0);
| }
|
| TableRowCollection newRows = table.Rows;
| if (ShowHeaderWhenEmpty)
| {
| // create a new header row
| _headerRow = CreateRow(-1, -1,
| DataControlRowType.Header, DataControlRowState.Normal);
| InitializeRow(_headerRow, fields, newRows);
| }
|
| //// create the empty row
| GridViewRow emptyRow = new GridViewRow(-1, -1,
| DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
| TableCell cell = new TableCell();
| cell.ColumnSpan = fields.Length;
| cell.Width = Unit.Percentage(100);
| //
| if (EmptyDataTemplate != null)
| {
| EmptyDataTemplate.InstantiateIn(cell);
| }
| else if (!string.IsNullOrEmpty(EmptyDataText))
| //else if (!string.IsNullOrEmpty(EmptyDataText) &&
| MyPrj.SNF.Web.Utils.Utils.InReadMode())
| {
| cell.Controls.Add(new
LiteralControl(EmptyDataText));
| }
| emptyRow.Cells.Add(cell);
| GridViewRowEventArgs e = new
GridViewRowEventArgs(emptyRow);
| OnRowCreated(e);
| newRows.Add(emptyRow);
| emptyRow.DataBind();
| OnRowDataBound(e);
| emptyRow.DataItem = null;
| if (ShowFooterWhenEmpty &&
| !MyPrj.SNF.Web.Utils.Utils.InReadMode())
| {
| // create footer row
| _footerRow = CreateRow(-1, -1,
| DataControlRowType.Footer, DataControlRowState.Normal);
| InitializeRow(_footerRow, fields, newRows);
| }
| }
| return rows;
| }
| #endregion
| #region protected override void Render()
| protected override void Render(HtmlTextWriter writer)
| {
| if (DataSource != null && GridMode == GridViewMode.Editable)
| {
| IList listRows = DataSource as IList;
| int rowIndex = 0;
| string itemCountHiddenField = "<input type=\"hidden\"
| name=\"" + this.PropertyName + "Count" + "\" id=\"" + this.PropertyName
+
| "Count" + "\" value=\"" + listRows.Count.ToString() + "\" />";
| writer.WriteLine(itemCountHiddenField);
| foreach (MyPrj.SNF.Model.IDomainObject domainObject in
| listRows)
| {
| foreach (GridViewColumnMetaData columnMetaData in
| MetaData.Columns)
| {
| object propValue =
| Utils.Utils.GetPropertyValue(domainObject, columnMetaData.PropertyName);
| string propertyValue = string.Empty;
| if (propValue != null)
| propertyValue = propValue.ToString();
| // Replace line breaks with a single space
| // Escape Double Quotes & backslashes so the
value
| can be put safely into the array and hidden fields
| propertyValue = propertyValue.Replace("\r\n", "
| ").Replace(@"\", @"\\").Replace(@"""", "\\\"");
|
|
| string hiddenFieldId = (PropertyName + "_" +
| rowIndex + "_" + columnMetaData.PropertyName);
| string hiddenFieldToRender = "<input
type=\"hidden\"
| name=\"" + hiddenFieldId + "\" id=\"" + hiddenFieldId + "\" value=\"" +
| propertyValue + "\" />";
| writer.WriteLine(hiddenFieldToRender);
| }
| rowIndex++;
| }
| }
| base.Render(writer);
| RenderHiddenFieldsForActions();
| }
| #endregion
| #region protected override void LoadControlState()
| /// <summary>
| /// Manages the Sort information.
| /// </summary>
| /// <param name="savedState"></param>
| protected override void LoadControlState(object savedState)
| {
| object[] states = (object[])savedState;
| base.LoadControlState(states[0]);
|
| CSSortExpression = (string)states[1];
| CSSortDirection =
| (MyPrj.SNF.Application.SortDirection)states[2];
| }
| #endregion
| #region protected override object SaveControlState()
| protected override object SaveControlState()
| {
| object[] states = new object[3];
| states[0] = base.SaveControlState();
|
| states[1] = CSSortExpression;
| states[2] = CSSortDirection;
|
| return states;
| }
| #endregion
| protected override void OnDataBinding(EventArgs e)
| {
| DataSource = Utils.Utils.GetPropertyValue(PropertyName) as
| IList;
| addColumns();
| base.OnDataBinding(e);
| }
| protected override void OnRowCreated(GridViewRowEventArgs e)
| {
| if (e.Row.DataItem != null && e.Row.RowType ==
| DataControlRowType.DataRow)
| {
| object isRowDeleted =
| Utils.Utils.GetPropertyValue((IDomainObject)e.Row.DataItem,
| "HasBeenDeleted");
| addRowEvents(e.Row, (bool)isRowDeleted);
| }
|
| #region Add footer row events
| if (MetaData != null && EditIndex < 0 && e.Row.RowType ==
| DataControlRowType.Footer)
| {
| foreach (GridViewActionInfo actionInfo in MetaData.Actions)
| {
| System.Web.UI.WebControls.LinkButton lb = new
| System.Web.UI.WebControls.LinkButton();
| if (actionInfo.EventLocation ==
| GridViewActionInfo.EventLocationCode.FooterRow)
| {
| lb.Text = actionInfo.DisplayName;
| lb.ID = "lnk" + this.ID + actionInfo.EventName;
| lb.CommandName = actionInfo.CommandType.ToString();
| lb.CausesValidation = actionInfo.CausesValidation;
| lb.ValidationGroup = this.ID;
| lb.OnClientClick = getGridEventOnClickString(e.Row,
lb,
| true, 0, actionInfo.CausesValidation,
actionInfo.ClientSideEventHandlerName,
| actionInfo.ActionParameters);
| lb.Attributes.Add("href", "#");
| addActionCell(e.Row, lb);
| TableHeaderCell c = new TableHeaderCell();
| c.Text = "";
| HeaderRow.Cells.Add(c);
| }
| }
| }
| #endregion
|
| base.OnRowCreated(e);
| }
| #region Delegated Events
|
| #region void EditableGrid_RowEditing(object sender,
GridViewEditEventArgs
| e)
| void EditableGrid_RowEditing(object sender, GridViewEditEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = e.NewEditIndex;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowDeleting(object sender,
| GridViewDeleteEventArgs e)
| void EditableGrid_RowDeleting(object sender, GridViewDeleteEventArgs
e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems = Activator.CreateInstance(domainObjectType);
| Array dataSourceItems = DataSource as Array;
| objItems = dataSourceItems.GetValue(e.RowIndex);
| Array updatedItems = getUpdatedItems((IList)DataSource, objItems,
| domainObjectType, e.RowIndex, "HasBeenDeleted", true);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowUpdating(object sender,
| GridViewUpdateEventArgs e)
| void EditableGrid_RowUpdating(object sender, GridViewUpdateEventArgs
e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
Activator.CreateInstance(domainObjectType);
| foreach (System.Web.UI.Control c in
| this.Rows[e.RowIndex].Controls)
| {
| //First level is table cell level.. we need to go one
more
| level..
| if (c is DataControlFieldCell && c.Controls.Count > 0)
| {
| System.Web.UI.Control ec = c.Controls[0] as
| System.Web.UI.Control;
| setEachControlValues(ec, objItems);
| }
| }
|
| Array updatedItems = getUpdatedItems((IList)DataSource,
| objItems, domainObjectType, e.RowIndex, "HasBeenEdited", true);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowCommand(object sender,
| GridViewCommandEventArgs e)
| void EditableGrid_RowCommand(object sender, GridViewCommandEventArgs
e)
| {
| if (BypassGridEvent)
| return;
|
| #region -- insert new row code here
|
| if (e.CommandName.Equals("Add"))
| {
| //Here we have to get each item value from the controls.
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
| Activator.CreateInstance(domainObjectType);
| foreach (System.Web.UI.Control c in
this.FooterRow.Controls)
| {
| //First level is table cell level.. we
| //need to go one more level..
| if (c.GetType().Name == "DataControlFieldCell" &&
| c.Controls.Count > 0)
| {
| System.Web.UI.Control ec = c.Controls[0] as
| System.Web.UI.Control;
| setEachControlValues(ec, objItems);
| }
| }
|
| Array addedItems = getAddedItems((IList)DataSource,
| objItems);
| setPropertyArrayValue(addedItems);
| this.DataSource = addedItems as IList;
| this.DataBind();
| }
|
| #endregion
|
| #region -- restore rows here
|
| if (e.CommandName.Equals("Restore"))
| {
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
| Activator.CreateInstance(domainObjectType);
| Array dataSourceItems = DataSource as Array;
| objItems =
| dataSourceItems.GetValue(Convert.ToInt32(e.CommandArgument));
| Array updatedItems = getUpdatedItems((IList)DataSource,
| objItems, domainObjectType, Convert.ToInt32(e.CommandArgument),
| "HasBeenDeleted", false);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
|
| #endregion
| }
| #endregion
| #region void EditableGrid_RowCancelingEdit(object sender,
| GridViewCancelEditEventArgs e)
| void EditableGrid_RowCancelingEdit(object sender,
| GridViewCancelEditEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_Sorting(object sender,
| GridViewSortEventArgs e)
| void EditableGrid_Sorting(object sender, GridViewSortEventArgs
e)
| {
| if (BypassGridEvent)
| return;
|
| MyPrj.SNF.Web.Controller.RequestContext
CurrentRequestContext
=
| Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
| MyPrj.SNF.Web.Controller.RequestContext;
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| CurrentRequestContext.CurrentControllerData;
|
| if (CSSortExpression !=
| ((GridViewSortEventArgs)e).SortExpression)
| CSSortDirection =
| MyPrj.SNF.Application.SortDirection.Ascending;
| else
| CSSortDirection = (CSSortDirection ==
| MyPrj.SNF.Application.SortDirection.Descending) ?
| MyPrj.SNF.Application.SortDirection.Ascending :
| MyPrj.SNF.Application.SortDirection.Descending;
|
| CSSortExpression =
((GridViewSortEventArgs)e).SortExpression;
| Array.Sort(DataSource as Array, new
| MyPrj.SNF.Application.ClassComparer(CSSortExpression, CSSortDirection));
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_PageIndexChanged(object sender,
EventArgs
| e)
| void EditableGrid_PageIndexChanged(object sender, EventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| bool displayLastPage = false;
| //try
| //{
| if (((GridViewPageEventArgs)e).NewPageIndex > -1)
| PageIndex = ((GridViewPageEventArgs)e).NewPageIndex;
| else
| displayLastPage = true;
| IList list = DataSource as IList;
| if (displayLastPage)
| PageIndex = (int)Math.Ceiling(((double)list.Count /
| PageSize)) - 1;
| this.DataBind();
| //}
| //catch (Exception expGeneral)
| //{
| // throw;
| //}
| }
|
| #endregion
|
| #endregion
| #endregion
|
| #region void addColumns()
|
| private void addColumns()
| {
| if (MetaData == null)
| MetaData =
GridViewMetaData.GetGridViewMetaData(MetaDataId);
| Columns.Clear();
|
| #region - all the controls
|
| foreach (GridViewColumnMetaData columnMetaData in
| MetaData.Columns)
| {
|
| if (columnMetaData.IsDisplayed)
| {
| TemplateField columnField = new TemplateField();
| columnField.HeaderText = columnMetaData.HeaderText;
| if (columnMetaData.IsSortable)
| columnField.SortExpression =
| columnMetaData.SortPropertyName;
| columnField.ItemStyle.HorizontalAlign =
| columnMetaData.HorizontalAlign;
| columnField.ItemStyle.Width = columnMetaData.Width;
|
| if (GridMode == GridViewMode.Editable)
| {
| columnField.ItemTemplate = new
| GridViewTemplate(ListItemType.Item, MetaData, columnMetaData, this.ID);
| columnField.EditItemTemplate = new
| GridViewTemplate(ListItemType.EditItem, MetaData, columnMetaData,
this.ID);
|
| if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
| this.EditIndex < 0)
| {
| columnField.FooterTemplate = new
| GridViewTemplate(ListItemType.Footer, MetaData, columnMetaData,
this.ID);
| }
| }
| //Add the newly created bound field to the GridView.
| Columns.Add(columnField);
| }
| }
|
| #endregion
|
| #region ------- add check box to each row if render
selection
is
| specified
|
|
| if ((MetaData.ShowSelectionInReadMode &&
| MyPrj.SNF.Web.Utils.Utils.InReadMode()) ||
| (MetaData.ShowSelectionInEditableMode &&
| !MyPrj.SNF.Web.Utils.Utils.InReadMode()))
| {
| GridViewColumnMetaData gvMetaData = new
| GridViewColumnMetaData(MetaData.SelectionPropertyName, "Select", false);
| gvMetaData.ColumnType = "DomainObjectSelection";
| TemplateField selectionField = new TemplateField();
| selectionField.ItemTemplate = new
| GridViewTemplate(ListItemType.EditItem, MetaData, gvMetaData, this.ID);
| Columns.Add(selectionField);
| }
|
| #endregion
|
| }
|
|
|
| #endregion
|
| #region private string getControlIndex()
| private string getControlIndex(bool isFooterRow, int
dataRowIndex)
| {
| //This is not a real code......????
| //what do i do if there is no option..
| string controlIndex = "";
| int startCount = 0;
|
| if (isFooterRow)
| {
| startCount = 3;
| if (Rows.Count > 1)
| startCount = 3 + (Rows.Count - 1);
|
| if (startCount < 10)
| controlIndex = "$ctl0" + startCount.ToString() +
"$";
| else
| controlIndex = "$ctl" + startCount.ToString() + "$";
| }
| else
| {
| startCount = 2 + dataRowIndex;
| if (startCount < 10)
| controlIndex = "$ctl0" + startCount.ToString() +
"$";
| else
| controlIndex = "$ctl" + startCount.ToString() + "$";
| }
|
| return controlIndex;
| }
| #endregion
|
| #region private void addRowEvents(GridViewRow gr)
| private void addRowEvents(GridViewRow gr, bool isDeleted)
| {
|
| System.Web.UI.WebControls.LinkButton lb = new
| System.Web.UI.WebControls.LinkButton();
| if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
| ShowGridViewEditButtons)
| {
|
| #region //first add the data row events
|
| foreach (GridViewActionInfo actionInfo in
MetaData.Actions)
| {
| if (actionInfo.EventLocation ==
| GridViewActionInfo.EventLocationCode.DataRow)
| {
| lb = new System.Web.UI.WebControls.LinkButton();
| lb.ID = "lnk" + this.ID + actionInfo.EventName;
| lb.Text = actionInfo.DisplayName;
| lb.CommandName =
actionInfo.CommandType.ToString();
| lb.ValidationGroup = this.ID;
| lb.CausesValidation =
actionInfo.CausesValidation;
| lb.Attributes.Add("href", "#");
| lb.OnClientClick = getGridEventOnClickString(gr,
lb,
| false, gr.RowIndex, actionInfo.CausesValidation,
| actionInfo.ClientSideEventHandlerName, actionInfo.ActionParameters);
|
|
| if (actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.SNF)
| lb.OnClientClick =
| getSNFOnclickString(actionInfo, gr);
| else if (isDeleted && actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.Restore)
| {
| //If its deleted row then just show the
restore
| event and return
| removeActionCell(gr);
| //set the deleted row css class
| gr.CssClass = RemovedItemCssClass;
| lb.CommandArgument = gr.RowIndex.ToString();
| addActionCell(gr, lb);
| addEmptyCell(gr);
| return;
| }
|
|
| bool addThis = false;
| if (EditIndex == gr.RowIndex &&
| (actionInfo.CommandType == GridViewActionInfo.CommandTypeCode.Update ||
| actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.Cancel))
| addThis = true;
| else if (EditIndex < 0 && EditIndex !=
gr.RowIndex
| && (actionInfo.CommandType != GridViewActionInfo.CommandTypeCode.Update
&&
| actionInfo.CommandType !=
| GridViewActionInfo.CommandTypeCode.Cancel && actionInfo.CommandType !=
| GridViewActionInfo.CommandTypeCode.Restore))
| addThis = true;
|
| if (addThis)
| addActionCell(gr, lb);
|
| }
| }
|
| #endregion
|
|
| #region //Add header row for the event
|
| TableHeaderCell c = new TableHeaderCell();
| c.Text = "";
| HeaderRow.Cells.Add(c);
|
| #endregion
|
| }
| }
| #endregion
|
| #region protected void RenderHiddenFieldsForActions()
| protected void RenderHiddenFieldsForActions()
| {
| if (MetaData == null || MetaData.Actions == null ||
| MetaData.Actions.Count < 1 || DataSource == null ||
| ((IList)DataSource).Count == 0)
| return;
|
| Hashtable hiddenFieldIds = new Hashtable();
| foreach (GridViewActionInfo actionInfo in MetaData.Actions)
| {
| if (actionInfo.ActionParameters != null)
| {
| foreach (string argumentName in
| actionInfo.ActionParameters.AllKeys)
| {
| if
| (!hiddenFieldIds.ContainsKey(actionInfo.ActionParameters[argumentName]))
|
hiddenFieldIds[actionInfo.ActionParameters[argumentName]]
| = null;
| }
| }
| }
| foreach (string hiddenFieldId in hiddenFieldIds.Keys)
| {
| // Add the Hidden Field only if the page doesn't already
| contain a control with same ID
| if (!Utils.Utils.IsControlOnPage(Page, hiddenFieldId))
| {
| //For ajax postback we will have to register the
hidden
| fields
| ScriptManager sm = ScriptManager.GetCurrent(Page);
| if (sm != null && sm.IsInAsyncPostBack)
|
System.Web.UI.ScriptManager.RegisterHiddenField(this,
| hiddenFieldId, string.Empty);
| else
|
Page.ClientScript.RegisterHiddenField(hiddenFieldId,
| string.Empty);
| }
| }
| }
| #endregion
|
| #region private string getSNFOnclickString(GridViewActionInfo
| actionInfo,GridViewRow gr)
| private string getSNFOnclickString(GridViewActionInfo
actionInfo,
| GridViewRow gr)
| {
| System.Text.StringBuilder sb = new
System.Text.StringBuilder();
| if (actionInfo.ActionParameters != null &&
| actionInfo.ActionParameters.Count > 0)
| {
| Type gridType = gr.DataItem.GetType();
| List<string> parameters = new List<string>();
| foreach (string propertyName in actionInfo.ActionParameters.AllKeys)
| {
| if (actionInfo.ActionParameters[propertyName] !=
null)
| {
| string controlId =
| actionInfo.ActionParameters[propertyName];
| object propertyValue =
| gridType.GetProperty(propertyName).GetValue(gr.DataItem, null);
| if (PropertyUtilities.IsNullValue(propertyValue))
| propertyValue = string.Empty;
|
| parameters.Add(controlId + "~" + propertyValue);
| }
| }
| object[] args = new object[] { "this",
actionInfo.EventName,
| actionInfo.ClientSideEventHandlerName, string.Join("-",
| parameters.ToArray()), gr.RowIndex };
| return
|
string.Format("processGridViewEvent(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\")
",
| args);
| }
| return string.Empty;
| }
| #endregion
|
| #region private string getGridEventOnClickString()
| private string getGridEventOnClickString(GridViewRow gridRow,
| System.Web.UI.WebControls.LinkButton lb, bool isFooterRow, int
dataRowIndex,
| bool causeValidation, string clientSideEventHandlerName,
NameValueCollection
| actionParameters)
| {
| string validationGroup = "donotValidate";
| if (causeValidation)
| validationGroup = ID;
|
| string uniqId = this.UniqueID + getControlIndex(isFooterRow,
| dataRowIndex) + lb.UniqueID;
| if (!string.IsNullOrEmpty(clientSideEventHandlerName))
| {
| List<string> parameters = new List<string>();
| parameters.Add("''");
| if (actionParameters != null && actionParameters.Count > 0)
| {
| parameters.Clear();
| Type gridType = gridRow.DataItem.GetType();
| foreach (string propertyName in actionParameters.AllKeys)
| {
| if (actionParameters[propertyName] != null)
| {
| string controlId = actionParameters[propertyName];
| object propertyValue =
| gridType.GetProperty(propertyName).GetValue(gridRow.DataItem, null);
| if (PropertyUtilities.IsNullValue(propertyValue))
| propertyValue = string.Empty;
| parameters.Add(controlId + "~" + propertyValue);
| }
| }
| }
|
| return string.Format("return
|
handleThenFireButtonEvent(\"{0}\",\"{1}\",\"{2}\",{3},\"{4}\",\"{5}\",\"{6}\
",\"{7}\",\"{8}\")",
| "this", GridPostbackEvent, clientSideEventHandlerName, "true",
| string.Join("-", parameters.ToArray()), validationGroup, uniqId,
| lb.CommandArgument, UpdatePanelId);
| }
| object[] args = new object[] { };
| return string.Format("return
|
validateAndFireButtonEventGroup(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\",\"{5
}\")",
| "this", GridPostbackEvent, validationGroup, uniqId, lb.CommandArgument,
| UpdatePanelId);
| }
| #endregion
|
| #region private TableRow addActionCell()
| private void addActionCell(GridViewRow gr,
| System.Web.UI.WebControls.LinkButton lb)
| {
| System.Web.UI.WebControls.TableCell tc = new TableCell();
| tc.Controls.Add(lb);
| ((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
| }
| #endregion
|
| #region private TableRow addEmptyCell()
| private void addEmptyCell(GridViewRow gr)
| {
| System.Web.UI.WebControls.TableCell tc = new TableCell();
| tc.Text = "&nbsp;&nbsp;";
| ((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
| }
| #endregion
|
| #region private void removeActionCell()
| private void removeActionCell(GridViewRow gr)
| {
| TableCell[] tmpcell = new TableCell[gr.Cells.Count];
| gr.Cells.CopyTo(tmpcell, 0);
| foreach (TableCell c in tmpcell)
| {
| System.Web.UI.Control ctrl = new
System.Web.UI.Control();
| if (c.Controls.Count > 0)
| ctrl = c.Controls[0];
| if (ctrl != null && ctrl.GetType().Name == "LinkButton")
| gr.Cells.Remove(c);
| }
|
| }
| #endregion
|
| #region private void setEachControlValues()
| private void setEachControlValues(System.Web.UI.Control ec,
object
| objItems)
| {
| switch (ec.GetType().Name)
| {
| case "TextBox":
| TextBox ctrlText = (TextBox)ec;
| setControlValue(ctrlText.ID, ctrlText.Text,
objItems);
| break;
| case "HiddenField":
| HiddenField ctrl = (HiddenField )ec;
| setControlValue(ctrl.ID, ctrl.Value, objItems);
| break;
| case "DateBox":
| DateBox ctrlDB = (DateBox)ec;
| setControlValue(ctrlDB.ID, ctrlDB.Text, objItems);
| break;
| case "DateTimeBox":
| DateTimeBox ctrlDTB = (DateTimeBox)ec;
| setControlValue(ctrlDTB.ID, ctrlDTB.Text, objItems);
| break;
| case "CheckBox":
| CheckBox ctrlCheck = (CheckBox)ec;
| string valueToSet = "N";
| if (ctrlCheck.Checked)
| valueToSet = "Y";
| setControlValue(ctrlCheck.ID, valueToSet, objItems);
| break;
| case "DropDownList":
| DropDownList ctrldrp = (DropDownList)ec;
| setControlValue(ctrldrp.ID, ctrldrp.SelectedValue,
| objItems);
| break;
| //also needs to set the ctrldrp.Text to the label
control
| //in the Items templates
| case "RadioButtonList":
| RadioButtonList ctrlRdo = (RadioButtonList)ec;
| setControlValue(ctrlRdo.ID, ctrlRdo.SelectedValue,
| objItems);
| break;
| case "Label":
| Label ctrlLabel = (Label)ec;
| setControlValue(ctrlLabel.ID, ctrlLabel.Text,
objItems);
| break;
| }
|
| }
|
| #endregion
|
| #region public GridViewMetaData MetaData
| private GridViewMetaData _MetaData;
| public GridViewMetaData MetaData
| {
| get { return _MetaData; }
| set { _MetaData = value; }
| }
| #endregion
|
| #region public string DomainObjectName
| private string _domainObjectName;
| public string DomainObjectName
| {
| get { return _domainObjectName; }
| set { _domainObjectName = value; }
| }
| #endregion
|
| #region public string DomainObjectListKey
| private string _DomainObjectListKey;
| public string DomainObjectListKey
| {
| get { return _DomainObjectListKey; }
| set { _DomainObjectListKey = value; }
| }
| #endregion
|
| #region public string MetaDataId
| private string _MetaDataId;
| public string MetaDataId
| {
| get { return _MetaDataId; }
| set { _MetaDataId = value; }
| }
| #endregion
|
| #region public string GridPostbackEvent
| private string _GridPostbackEvent;
| public string GridPostbackEvent
| {
| get { return _GridPostbackEvent; }
| set { _GridPostbackEvent = value; }
| }
| #endregion
|
| #region public bool BypassGridEvent
| private bool _BypassGridEvent = false;
| public bool BypassGridEvent
| {
| get { return _BypassGridEvent; }
| set { _BypassGridEvent = value; }
| }
| #endregion
|
| #region public bool ShowGridViewEditButtons
| private bool _ShowGridViewEditButtons;
| public bool ShowGridViewEditButtons
| {
| get { return _ShowGridViewEditButtons; }
| set { _ShowGridViewEditButtons = value; }
| }
| #endregion
|
| #region public string PropertyName
| private string _PropertyName = string.Empty;
| public string PropertyName
| {
| get { return _PropertyName; }
| set { _PropertyName = value; }
| }
| #endregion
|
| #region private Array getAddedItems()
| private Array getAddedItems(IList oldList, object addedItems)
| {
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| int arrayLength = 1;
| if (oldList != null && oldList.Count > 0)
| arrayLength = oldList.Count + 1;
| Array arrayItems =
Array.CreateInstance(addedItems.GetType(),
| arrayLength);
| int i = 0;
| if (oldList != null && oldList.Count > 0)
| {
| foreach (IDomainObject dm in oldList)
| {
| arrayItems.SetValue(dm, i);
| i++;
| }
| }
| arrayItems.SetValue(addedItems, i);
| return arrayItems;
| }
| #endregion
|
| #region private Array getUpdatedItems()
| private Array getUpdatedItems(IList oldList, object
updatedItems,
| Type domainObjectType, int rowIndex, string propertyToUpdate, bool
value)
| {
| //Also set the HasBeenEdited/HasBeenDeleted field with the
value
| true/false..
| setControlValue(propertyToUpdate, value, updatedItems);
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| Array arrayItems = Array.CreateInstance(domainObjectType,
| oldList.Count);
| int i = 0;
| foreach (IDomainObject dm in oldList)
| {
| if (i == rowIndex)//if the row index match the current object then
| replace the displayed column's values with the updated one
| {
| foreach (GridViewColumnMetaData columnMetaData in MetaData.Columns)
| {
| if (columnMetaData.IsDisplayed)
| {
| PropertyUtilities.SetValue(dm, columnMetaData.PropertyName,
| PropertyUtilities.GetValue((IDomainObject)updatedItems,
| columnMetaData.PropertyName));
| }
| }
| }
| // also set hasbeenEdited/hasbeenDeleted with true/false
| setControlValue(propertyToUpdate, value, dm);
| arrayItems.SetValue(dm, i);
| i++;
| }
| return arrayItems;
| }
| #endregion
|
| #region private Array getRemovedItems()
| private Array getRemovedItems(IList oldList, object
removedItems,
| int rowIndex)
| {
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| Array arrayItemsToCopy =
| Array.CreateInstance(removedItems.GetType(), oldList.Count);
| Array arrayItems =
Array.CreateInstance(removedItems.GetType(),
| oldList.Count - 1);
| int i = 0;
| foreach (IDomainObject dm in oldList)
| {
| if (i != rowIndex)//if the row index match the current
| object then remove it(do not add to list)
| arrayItemsToCopy.SetValue(dm, i);
| i++;
| }
|
| int newArrayCount = 0;
| for (int j = 0; j < arrayItemsToCopy.Length; j++)
| {
| if (arrayItemsToCopy.GetValue(j) != null)
| {
| arrayItems.SetValue(arrayItemsToCopy.GetValue(j),
| newArrayCount);
| newArrayCount++;
| }
| }
|
| return arrayItems;
| }
| #endregion
|
| #region private void setControlValue()
| private void setControlValue(string propertyName, object value,
| object dObject)
| {
| PropertyInfo pi = null;
| pi = dObject.GetType().GetProperty(propertyName);
| SNF.Model.PropertyUtilities.SetValue((IDomainObject)dObject,
pi,
| value);
|
| }
| #endregion
|
| #region private void setPropertyArrayValue()
| private void setPropertyArrayValue(Array arrayItems)
| {
|
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| IDomainObject domainObject =
CurrentControllerData.DomainObject;
| PropertyInfo pi =
| domainObject.GetType().GetProperty(PropertyName);
| pi.SetValue(domainObject, arrayItems, null);
| }
| #endregion
|
| #region private void ProcessControllerEvent()
| private void ProcessControllerEvent(string eventName)
| {
| // Process the current event
|
| MyPrj.SNF.Web.Controller.RequestContext
CurrentRequestContext
=
| Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
| MyPrj.SNF.Web.Controller.RequestContext;
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| CurrentRequestContext.CurrentControllerData;
| CurrentControllerData.EventName = eventName;
|
| MyPrj.SNF.Web.Controller.ProcessResult pr =
| MyPrj.SNF.Web.Controller.EventProcessor.ProcessEvent(
| CurrentRequestContext, CurrentControllerData.StateId,
| CurrentControllerData.EventName);
|
| CurrentControllerData.EventName = pr.EventName; // Capture
the
| EventName from the result;
| }
| #endregion
|
| #region private void addAjaxSupport()
| private void addAjaxSupport(bool add)
| {
| ScriptManager
| sm = ScriptManager.GetCurrent(Page);
| if (sm == null)
| throw new HttpException("A ScriptManager control must
exist
| on the current page.");
| UpdatePanel updatePanel = new UpdatePanel();
| updatePanel.UpdateMode = UpdatePanelUpdateMode.Conditional;
| updatePanel.ID = "updatePanel" + this.ID;
| updatePanel.ContentTemplateContainer.Controls.Add(this);
| this.Controls.Add(updatePanel);
| }
| #endregion
|
| #region -- section to show/hide empty header and footer rows
|
| private GridViewRow _headerRow;
| private GridViewRow _footerRow;
|
| private bool _showHeaderWhenEmpty;
| private bool _showFooterWhenEmpty;
|
| public bool ShowHeaderWhenEmpty
| {
| get { return _showHeaderWhenEmpty; }
| set { _showHeaderWhenEmpty = value; }
| }
|
| public bool ShowFooterWhenEmpty
| {
| get { return _showFooterWhenEmpty; }
| set { _showFooterWhenEmpty = value; }
| }
|
| public override GridViewRow HeaderRow
| {
| get { return base.HeaderRow ?? _headerRow; }
| }
|
| public override GridViewRow FooterRow
| {
| get { return base.FooterRow ?? _footerRow; }
| }
|
| private void InitializeRow(GridViewRow row, DataControlField[]
| fields, TableRowCollection newRows)
| {
| GridViewRowEventArgs e = new GridViewRowEventArgs(row);
| InitializeRow(row, fields);
| OnRowCreated(e);
| newRows.Add(row);
| row.DataBind();
| OnRowDataBound(e);
| row.DataItem = null;
| }
|
| #endregion
|
| #region protected void SetupStyleAndBehaviour ()
| protected virtual void SetupStyleAndBehaviour()
| {
| EnableViewState = false;
| AutoGenerateColumns = false;
|
| AllowSorting = true;
| AllowPaging = true;
| EnableSortingAndPagingCallbacks = false;
| AutoGenerateSelectButton = false;
| AutoGenerateDeleteButton = false;
| AutoGenerateEditButton = false;
|
| ShowHeader = true;
| ShowFooter = true;
| EmptyDataText = "No records found";
|
| CssClass = "grid";
| CellPadding = 3;
| CellSpacing = 0;
| GridLines = GridLines.Horizontal;
|
| PageSize = 20;
| PagerStyle.CssClass = "gridPager";
| PagerSettings.FirstPageText = "<<";
| PagerSettings.PreviousPageText = "<";
| PagerSettings.NextPageText = ">";
| PagerSettings.LastPageText = ">>";
| PagerSettings.PageButtonCount = 10;
| PagerSettings.Mode = PagerButtons.NumericFirstLast;
|
| RowStyle.CssClass = "gridRow";
| SelectedRowStyle.CssClass = "gridSelectedRow";
| HeaderStyle.CssClass = "gridViewHeader";
| FooterStyle.CssClass = "gridfooter";
| AlternatingRowStyle.CssClass = "gridAlternatingRow";
| RemovedItemCssClass = "gridDeletedRow";
| }
| #endregion
|
| #region public GridViewMode GridMode
| private GridViewMode _GridMode = GridViewMode.Editable;
| /// <summary>
| ///
| /// </summary>
| public GridViewMode GridMode
| {
| get { return _GridMode; }
| set { _GridMode = value; }
| }
| #endregion
|
| #region Custom Management of SortExpression & SortDirection
|
| #region public string CSSortExpression
| private string _CSSortExpression;
| public string CSSortExpression
| {
| get { return _CSSortExpression; }
| set { _CSSortExpression = value; }
| }
| #endregion
|
| #region public SortDirection CSSortDirection
| private MyPrj.SNF.Application.SortDirection _CSSortDirection;
| public MyPrj.SNF.Application.SortDirection CSSortDirection
| {
| get { return _CSSortDirection; }
| set { _CSSortDirection = value; }
| }
| #endregion
|
| #endregion Custom Management of SortExpression & SortDirection
|
| #region public string RemovedItemCssClass
| private string _RemovedItemCssClass;
| public string RemovedItemCssClass
| {
| get { return _RemovedItemCssClass; }
| set { _RemovedItemCssClass = value; }
| }
| #endregion
|
| #region public string UpdatePanelId
| private string _UpdatePanelId;
| public string UpdatePanelId
| {
| get { return _UpdatePanelId; }
| set { _UpdatePanelId = value; }
| }
| #endregion
| }
| }
|
|
|
| | > hello, I have 2 new issues:
| >
| > 1. My control is overriding OnRowCreated and it calls
base.OnRowCreated
| > and on my aspx.cs page i am attaching an event handler to this
RowCreated
| > but it is not running. I also tried to add an event handler to
| > RowDataBound and calling base.OnRowDataBound and it doesnt get called
in
| > aspx.cs either.
| >
| > What could be the cause of this? I dont understand since i'm calling
base
| > implementation (which seeing the code thru reflector it calls any
attached
| > handlers)
| >
| > 2. This is related somehow to first point. As stated in the first
problem
| > you already resolved, i attached event handlers in my custom control
| > instead of overriding them and that caused my event handlers on
aspx.cs
| > page to be called correctly for most of them. When i tried to attach
event
| > handler for RowCreated in custom control, it is not called, but when I
| > override OnRowCreated it is called. Even when I attached event handler
for
| > RowCreated in custom control AND aspx.cs page, neither were called.
The
| > grid events that I am currently using successfully on aspx.cs are
| > RowUpdating and RowEditing, both of which are also attached event
handlers
| > in custom control.
| >
| > thanks
| >
| > | >> Hi,
| >>
| >> Do you have any further questions? If you have please provide some
code
| >> so
| >> that I can test it on my side.
| >>
| >> Regards,
| >> Allen Chen
| >> Microsoft Online Community Support
| >>
| >> --------------------
| >> | From: "TS" <[email protected]>
| >> | References: <#[email protected]>
| >> <#[email protected]>
| >> <[email protected]>
| >> <[email protected]>
| >> | Subject: Re: overriding GridView.OnRowDeleting - can call
registered
| >> event handlers
| >> | Date: Wed, 22 Oct 2008 11:07:08 -0500
| >> | Lines: 223
| >> | X-Priority: 3
| >> | X-MSMail-Priority: Normal
| >> | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | X-RFC2646: Format=Flowed; Original
| >> | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | Message-ID: <[email protected]>
| >> | Newsgroups:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | NNTP-Posting-Host: 168.38.106.193
| >> | Path:
TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| >> | Xref: TK2MSFTNGHUB02.phx.gbl
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols:1142
| >> | X-Tomcat-NG:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> |
| >> | that did it, but for some reason the delegates for DataBinding was
not
| >> | getting called, but that method does call base.DataBind, so make it
| >> | overridable is OK, though not sure why it wasnt getting called
| >> |
message
| >> | | >> | > Hi,
| >> | >
| >> | > Thanks for your clarification. To achieve your requirement I
would
| >> suggest
| >> | > you attach an event handler in the constructor method instead of
| >> | > overriding
| >> | > the OnRowDeleting method.
| >> | >
| >> | > public class MyGridView : GridView
| >> | > {
| >> | >
| >> | > public MyGridView()
| >> | > {
| >> | > this.RowDeleting += new
| >> | > GridViewDeleteEventHandler(MyGridView_RowDeleting);
| >> | > }
| >> | > void MyGridView_RowDeleting(object sender,
| >> GridViewDeleteEventArgs
| >> | > e)
| >> | > {
| >> | > //Your code here
| >> | > }
| >> | > }
| >> | >
| >> | > Please have a try and let me know if it's what you need.
| >> | >
| >> | > Regards,
| >> | > Allen Chen
| >> | > Microsoft Online Support
| >> | >
| >> | > --------------------
| >> | > | From: "TS" <[email protected]>
| >> | > | References: <#[email protected]>
| >> | > <#[email protected]>
| >> | > | Subject: Re: overriding GridView.OnRowDeleting - can call
| >> registered
| >> | > event handlers
| >> | > | Date: Tue, 21 Oct 2008 11:38:04 -0500
| >> | > | Lines: 136
| >> | > | X-Priority: 3
| >> | > | X-MSMail-Priority: Normal
| >> | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | > | X-RFC2646: Format=Flowed; Original
| >> | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | > | Message-ID: <[email protected]>
| >> | > | Newsgroups:
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | NNTP-Posting-Host: 168.38.106.193
| >> | > | Path:
| >> TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| >> | > | Xref: TK2MSFTNGHUB02.phx.gbl
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| >> | > | X-Tomcat-NG:
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > |
| >> | > | So it looks like the "else if" section of the posted code below
is
| >> | > getting
| >> | > | run, which throws an exception and this is why that
| >> base.OnRowDeleting
| >> | > is
| >> | > | commented out. Our custom OnRowDeleting does a lot of stuff in
it
| >> that
| >> | > is
| >> | > | common to every grid. The only thing the base class does is
call
| >> any
| >> | > | registered delegates. So if we dont add event handler in aspx
page
| >> for
| >> | > | onRowDeleting, the base class will throw this error.
| >> | > |
| >> | > | We want to not have to attach custom event handlers in every
aspx
| >> page
| >> | > that
| >> | > | uses the grid control and just let our custom gridView handle
all
| >> the
| >> | > | processing in all the grid events (onRowEditing, onRowUpdating,
| >> | > | onRowDeleting, etc.), but I need to be able to support
overriding
| >> this
| >> | > | behavior sometimes by adding a custom event handler in my aspx
| >> page.
| >> | > |
| >> | > | Could I override the each Event Handler's add/remove properties
so
| >> that
| >> | > i
| >> | > | can handle the Event[] collection myself and then i'll be able
to
| >> call
| >> | > the
| >> | > | individually registered delegates?
| >> | > | public event GridViewDeleteEventHandler RowDeleting
| >> | > |
| >> | > | {
| >> | > |
| >> | > | add
| >> | > |
| >> | > | {
| >> | > |
| >> | > | base.Events.AddHandler(EventRowDeleting, value);
| >> | > |
| >> | > | }
| >> | > |
| >> | > | remove
| >> | > |
| >> | > | {
| >> | > |
| >> | > | base.Events.RemoveHandler(EventRowDeleting, value);
| >> | > |
| >> | > | }
| >> | > |
| >> | > | }
| >> | > |
| >> | > |
| >> message
| >> | > | | >> | > | > Hi,
| >> | > | >
| >> | > | > As you said, it's a private field so we cannot access it in
the
| >> custom
| >> | > | > GridView. I think we'd better focus on your following
statement:
| >> | > | >
| >> | > | > I have a custom GridView and it overrides onRowDeleting and
| >> doesn't
| >> | > | > call base.OnRowDeleting because the person implementing had
| >> | > undesirable
| >> | > | > effects.
| >> | > | >
| >> | > | > Could you tell me what're the undesirable effects and your
| >> requirement
| >> | > as
| >> | > | > well? I think if we can eliminate them this issue can be
worked
| >> | > around.
| >> | > | >
| >> | > | > Regards,
| >> | > | > Allen Chen
| >> | > | > Microsoft Online Support
| >> | > | >
| >> | > | > Delighting our customers is our #1 priority. We welcome your
| >> comments
| >> | > and
| >> | > | > suggestions about how we can improve the support we provide
to
| >> you.
| >> | > Please
| >> | > | > feel free to let my manager know what you think of the level
of
| >> | > service
| >> | > | > provided. You can send feedback directly to my manager at:
| >> | > | > (e-mail address removed).
| >> | > | >
| >> | > | > ==================================================
| >> | > | > Get notification to my posts through email? Please refer to
| >> | > | >
| >> | >
| >>
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| >> | > | >
| >> | > | > Note: The MSDN Managed Newsgroup support offering is for
| >> non-urgent
| >> | > issues
| >> | > | > where an initial response from the community or a Microsoft
| >> Support
| >> | > | > Engineer within 1 business day is acceptable. Please note
that
| >> each
| >> | > follow
| >> | > | > up response may take approximately 2 business days as the
support
| >> | > | > professional working with you may need further investigation
to
| >> reach
| >> | > the
| >> | > | > most efficient resolution. The offering is not appropriate
for
| >> | > situations
| >> | > | > that require urgent, real-time or phone-based interactions or
| >> complex
| >> | > | > project analysis and dump analysis issues. Issues of this
nature
| >> are
| >> | > best
| >> | > | > handled working with a dedicated Microsoft Support Engineer
by
| >> | > contacting
| >> | > | > Microsoft Customer Support Services (CSS) at
| >> | > | >
| >> | >
| >>
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| >> | > | > ==================================================
| >> | > | > This posting is provided "AS IS" with no warranties, and
confers
| >> no
| >> | > | > rights.
| >> | > | >
| >> | > | > --------------------
| >> | > | > | From: "TS" <[email protected]>
| >> | > | > | Subject: overriding GridView.OnRowDeleting - can call
| >> registered
| >> | > event
| >> | > | > handlers
| >> | > | > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| >> | > | > | Lines: 24
| >> | > | > | X-Priority: 3
| >> | > | > | X-MSMail-Priority: Normal
| >> | > | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | > | > | X-RFC2646: Format=Flowed; Original
| >> | > | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | > | > | Message-ID: <#[email protected]>
| >> | > | > | Newsgroups:
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | > | NNTP-Posting-Host: 168.38.106.193
| >> | > | > | Path:
| >> | > TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| >> | > | > | Xref: TK2MSFTNGHUB02.phx.gbl
| >> | > | >
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| >> | > | > | X-Tomcat-NG:
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | > |
| >> | > | > | Hello, I have a custom GridView and it overrides
onRowDeleting
| >> and
| >> | > | > doesn't
| >> | > | > | call base.OnRowDeleting because the person implementing had
| >> | > undesirable
| >> | > | > | effects. the problem is I now when clients of this control
| >> register
| >> | > | > their
| >> | > | > | own event handlers for RowDeleting, it is never raised.
| >> | > | > |
| >> | > | > | I'm trying to add lines 1 - 5 to my overriden OnRowDeleting
| >> method
| >> | > but
| >> | > | > can't
| >> | > | > | because the key accessed in base.Events is
EventRowDeleting,
| >> which
| >> | > is
| >> | > an
| >> | > | > | object that is a private constant that i dont have access
to
in
| >> my
| >> | > | > derived
| >> | > | > | control.
| >> | > | > |
| >> | > | > | How do I get a handle to any event handlers so I can call
| >> them???
| >> | > | > |
| >> | > | > | // this is the dissasembled method for GridView:
| >> | > | > | protected virtual void
OnRowDeleting(GridViewDeleteEventArgs
| >> e){
| >> | > | > bool
| >> | > | > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| >> | > | > | GridViewDeleteEventHandler handler =
| >> (GridViewDeleteEventHandler)
| >> | > | > | base.Events[EventRowDeleting];2 if (handler != null)3
{4
| >> | > | > | handler(this, e);5 } else if
(!isBoundUsingDataSourceID
| >> &&
| >> | > | > !e.Cancel)
| >> | > | > | { throw new
| >> | > | > HttpException(SR.GetString("GridView_UnhandledEvent",
| >> | > | > | new object[] { this.ID, "RowDeleting" })); }}
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | >
| >> | > |
| >> | > |
| >> | > |
| >> | >
| >> |
| >> |
| >> |
| >>
| >
| >
|
|
|
 
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T

TS

Resolution has been made...the issue was due to the wiring up of the events
happening at page_load. Putting that code in page_init solved the problem.
The reason the events were getting raised when clicking the grid's event
buttons is because those events are post back events which are called after
page_load so having the wiring at page_load worked for those.


TS said:
sent it today

Allen Chen said:
Hi,

Have you sent the demo to me?

Regards,
Allen Chen
Microsoft Online Support
--------------------
| From: "TS" <[email protected]>
| References: <#[email protected]>
<#[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
| Subject: Re: overriding GridView.OnRowDeleting - can call registered
event handlers
| Date: Wed, 29 Oct 2008 11:08:23 -0500
| Lines: 1559
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| X-RFC2646: Format=Flowed; Response
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| Message-ID: <eikj[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.buildingcontrols
| NNTP-Posting-Host: 168.38.106.113
| Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP05.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1147
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols
|
| I see now that all the events get raised when I click one of the grid's
| buttons to fire Edit, Update, etc. So on default data binding of the
grid,
| on just load of the page, the events are not getting raised. Sounds
like
| something is missing from the control's code:
|
| using System;
| using System.Collections;
| using System.Collections.Specialized;
| using System.Collections.Generic;
| using System.Web.UI.WebControls;
| using System.Web.UI;
| using System.Reflection;
| using MyPrj.SNF.Model;
| using MyPrj.SNF.Application;
| using System.Data;
| using System.Web;
| /// <summary>
| /// Summary description for EditableGrid
| /// </summary>
|
| namespace MyPrj.SNF.Web.Control
| {
|
| public class EditableGrid : System.Web.UI.WebControls.GridView
| {
| public EditableGrid()
| {
| //
| // TODO: Add constructor logic here
| //
| ShowFooter = true;
| ShowHeader = true;
| ShowFooterWhenEmpty = true;
| ShowHeaderWhenEmpty = true;
| ShowGridViewEditButtons = true;
| GridPostbackEvent = "GridReload";
| EmptyDataText = "No Records Found";
| EnableViewState = false;
| SetupStyleAndBehaviour();
| }
|
| #region Events
| #region protected override void OnLoad(EventArgs e)
| protected override void OnLoad(EventArgs e)
| {
| base.OnLoad(e);
| #region Add Delegates for all grid events
| // Add delegates instead of overriding for all the grid events that
dont
| need to call base's implementation, otherwise
| // every aspx page would have to have a delegate for each grid event
that
| was supported for that grid on that page
|
| // Note: do in OnLoad so that the individual aspx pages can also do
this
| in their OnLoad and have their events
| // run first so that the BypassGridEvent flag can be set to true to
| bypass execution here.
| this.RowCommand += new
| GridViewCommandEventHandler(EditableGrid_RowCommand);
| this.RowEditing += new
GridViewEditEventHandler(EditableGrid_RowEditing);
| this.RowCancelingEdit += new
| GridViewCancelEditEventHandler(EditableGrid_RowCancelingEdit);
| this.RowUpdating += new
| GridViewUpdateEventHandler(EditableGrid_RowUpdating);
| this.RowDeleting += new
| GridViewDeleteEventHandler(EditableGrid_RowDeleting);
| this.Sorting += new GridViewSortEventHandler(EditableGrid_Sorting);
| this.PageIndexChanged += new
EventHandler(EditableGrid_PageIndexChanged);
| #endregion
| }
| #endregion
| #region protected override int CreateChildControls(IEnumerable
dataSource,
| bool dataBinding)
| protected override int CreateChildControls(IEnumerable dataSource,
bool
| dataBinding)
| {
| int rows = base.CreateChildControls(dataSource,
dataBinding);
|
| // no data rows created, create empty table if enabled
| if (rows == 0 && (ShowFooterWhenEmpty ||
ShowHeaderWhenEmpty))
| {
| // create the table
| Table table = CreateChildTable();
| Controls.Clear();
| Controls.Add(table);
| DataControlField[] fields;
| if (AutoGenerateColumns)
| {
| PagedDataSource source = new PagedDataSource();
| source.DataSource = dataSource;
| ICollection autoGeneratedColumns =
CreateColumns(source,
| true);
| fields = new
| DataControlField[autoGeneratedColumns.Count];
| autoGeneratedColumns.CopyTo(fields, 0);
| }
| else
| {
| fields = new DataControlField[Columns.Count];
| Columns.CopyTo(fields, 0);
| }
|
| TableRowCollection newRows = table.Rows;
| if (ShowHeaderWhenEmpty)
| {
| // create a new header row
| _headerRow = CreateRow(-1, -1,
| DataControlRowType.Header, DataControlRowState.Normal);
| InitializeRow(_headerRow, fields, newRows);
| }
|
| //// create the empty row
| GridViewRow emptyRow = new GridViewRow(-1, -1,
| DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
| TableCell cell = new TableCell();
| cell.ColumnSpan = fields.Length;
| cell.Width = Unit.Percentage(100);
| //
| if (EmptyDataTemplate != null)
| {
| EmptyDataTemplate.InstantiateIn(cell);
| }
| else if (!string.IsNullOrEmpty(EmptyDataText))
| //else if (!string.IsNullOrEmpty(EmptyDataText) &&
| MyPrj.SNF.Web.Utils.Utils.InReadMode())
| {
| cell.Controls.Add(new
LiteralControl(EmptyDataText));
| }
| emptyRow.Cells.Add(cell);
| GridViewRowEventArgs e = new
GridViewRowEventArgs(emptyRow);
| OnRowCreated(e);
| newRows.Add(emptyRow);
| emptyRow.DataBind();
| OnRowDataBound(e);
| emptyRow.DataItem = null;
| if (ShowFooterWhenEmpty &&
| !MyPrj.SNF.Web.Utils.Utils.InReadMode())
| {
| // create footer row
| _footerRow = CreateRow(-1, -1,
| DataControlRowType.Footer, DataControlRowState.Normal);
| InitializeRow(_footerRow, fields, newRows);
| }
| }
| return rows;
| }
| #endregion
| #region protected override void Render()
| protected override void Render(HtmlTextWriter writer)
| {
| if (DataSource != null && GridMode ==
GridViewMode.Editable)
| {
| IList listRows = DataSource as IList;
| int rowIndex = 0;
| string itemCountHiddenField = "<input type=\"hidden\"
| name=\"" + this.PropertyName + "Count" + "\" id=\"" + this.PropertyName
+
| "Count" + "\" value=\"" + listRows.Count.ToString() + "\" />";
| writer.WriteLine(itemCountHiddenField);
| foreach (MyPrj.SNF.Model.IDomainObject domainObject in
| listRows)
| {
| foreach (GridViewColumnMetaData columnMetaData in
| MetaData.Columns)
| {
| object propValue =
| Utils.Utils.GetPropertyValue(domainObject,
columnMetaData.PropertyName);
| string propertyValue = string.Empty;
| if (propValue != null)
| propertyValue = propValue.ToString();
| // Replace line breaks with a single space
| // Escape Double Quotes & backslashes so the
value
| can be put safely into the array and hidden fields
| propertyValue = propertyValue.Replace("\r\n", "
| ").Replace(@"\", @"\\").Replace(@"""", "\\\"");
|
|
| string hiddenFieldId = (PropertyName + "_" +
| rowIndex + "_" + columnMetaData.PropertyName);
| string hiddenFieldToRender = "<input
type=\"hidden\"
| name=\"" + hiddenFieldId + "\" id=\"" + hiddenFieldId + "\" value=\"" +
| propertyValue + "\" />";
| writer.WriteLine(hiddenFieldToRender);
| }
| rowIndex++;
| }
| }
| base.Render(writer);
| RenderHiddenFieldsForActions();
| }
| #endregion
| #region protected override void LoadControlState()
| /// <summary>
| /// Manages the Sort information.
| /// </summary>
| /// <param name="savedState"></param>
| protected override void LoadControlState(object savedState)
| {
| object[] states = (object[])savedState;
| base.LoadControlState(states[0]);
|
| CSSortExpression = (string)states[1];
| CSSortDirection =
| (MyPrj.SNF.Application.SortDirection)states[2];
| }
| #endregion
| #region protected override object SaveControlState()
| protected override object SaveControlState()
| {
| object[] states = new object[3];
| states[0] = base.SaveControlState();
|
| states[1] = CSSortExpression;
| states[2] = CSSortDirection;
|
| return states;
| }
| #endregion
| protected override void OnDataBinding(EventArgs e)
| {
| DataSource = Utils.Utils.GetPropertyValue(PropertyName) as
| IList;
| addColumns();
| base.OnDataBinding(e);
| }
| protected override void OnRowCreated(GridViewRowEventArgs e)
| {
| if (e.Row.DataItem != null && e.Row.RowType ==
| DataControlRowType.DataRow)
| {
| object isRowDeleted =
| Utils.Utils.GetPropertyValue((IDomainObject)e.Row.DataItem,
| "HasBeenDeleted");
| addRowEvents(e.Row, (bool)isRowDeleted);
| }
|
| #region Add footer row events
| if (MetaData != null && EditIndex < 0 && e.Row.RowType ==
| DataControlRowType.Footer)
| {
| foreach (GridViewActionInfo actionInfo in MetaData.Actions)
| {
| System.Web.UI.WebControls.LinkButton lb = new
| System.Web.UI.WebControls.LinkButton();
| if (actionInfo.EventLocation ==
| GridViewActionInfo.EventLocationCode.FooterRow)
| {
| lb.Text = actionInfo.DisplayName;
| lb.ID = "lnk" + this.ID + actionInfo.EventName;
| lb.CommandName = actionInfo.CommandType.ToString();
| lb.CausesValidation = actionInfo.CausesValidation;
| lb.ValidationGroup = this.ID;
| lb.OnClientClick = getGridEventOnClickString(e.Row,
lb,
| true, 0, actionInfo.CausesValidation,
actionInfo.ClientSideEventHandlerName,
| actionInfo.ActionParameters);
| lb.Attributes.Add("href", "#");
| addActionCell(e.Row, lb);
| TableHeaderCell c = new TableHeaderCell();
| c.Text = "";
| HeaderRow.Cells.Add(c);
| }
| }
| }
| #endregion
|
| base.OnRowCreated(e);
| }
| #region Delegated Events
|
| #region void EditableGrid_RowEditing(object sender,
GridViewEditEventArgs
| e)
| void EditableGrid_RowEditing(object sender, GridViewEditEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = e.NewEditIndex;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowDeleting(object sender,
| GridViewDeleteEventArgs e)
| void EditableGrid_RowDeleting(object sender, GridViewDeleteEventArgs
e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems = Activator.CreateInstance(domainObjectType);
| Array dataSourceItems = DataSource as Array;
| objItems = dataSourceItems.GetValue(e.RowIndex);
| Array updatedItems = getUpdatedItems((IList)DataSource, objItems,
| domainObjectType, e.RowIndex, "HasBeenDeleted", true);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowUpdating(object sender,
| GridViewUpdateEventArgs e)
| void EditableGrid_RowUpdating(object sender, GridViewUpdateEventArgs
e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
Activator.CreateInstance(domainObjectType);
| foreach (System.Web.UI.Control c in
| this.Rows[e.RowIndex].Controls)
| {
| //First level is table cell level.. we need to go one
more
| level..
| if (c is DataControlFieldCell && c.Controls.Count > 0)
| {
| System.Web.UI.Control ec = c.Controls[0] as
| System.Web.UI.Control;
| setEachControlValues(ec, objItems);
| }
| }
|
| Array updatedItems = getUpdatedItems((IList)DataSource,
| objItems, domainObjectType, e.RowIndex, "HasBeenEdited", true);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_RowCommand(object sender,
| GridViewCommandEventArgs e)
| void EditableGrid_RowCommand(object sender, GridViewCommandEventArgs
e)
| {
| if (BypassGridEvent)
| return;
|
| #region -- insert new row code here
|
| if (e.CommandName.Equals("Add"))
| {
| //Here we have to get each item value from the
controls.
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
| Activator.CreateInstance(domainObjectType);
| foreach (System.Web.UI.Control c in
this.FooterRow.Controls)
| {
| //First level is table cell level.. we
| //need to go one more level..
| if (c.GetType().Name == "DataControlFieldCell" &&
| c.Controls.Count > 0)
| {
| System.Web.UI.Control ec = c.Controls[0] as
| System.Web.UI.Control;
| setEachControlValues(ec, objItems);
| }
| }
|
| Array addedItems = getAddedItems((IList)DataSource,
| objItems);
| setPropertyArrayValue(addedItems);
| this.DataSource = addedItems as IList;
| this.DataBind();
| }
|
| #endregion
|
| #region -- restore rows here
|
| if (e.CommandName.Equals("Restore"))
| {
| this.EditIndex = -1;
| Type domainObjectType = Type.GetType(DomainObjectName);
| object objItems =
| Activator.CreateInstance(domainObjectType);
| Array dataSourceItems = DataSource as Array;
| objItems =
| dataSourceItems.GetValue(Convert.ToInt32(e.CommandArgument));
| Array updatedItems = getUpdatedItems((IList)DataSource,
| objItems, domainObjectType, Convert.ToInt32(e.CommandArgument),
| "HasBeenDeleted", false);
| setPropertyArrayValue(updatedItems);
| this.DataSource = updatedItems as IList;
| this.DataBind();
| }
|
| #endregion
| }
| #endregion
| #region void EditableGrid_RowCancelingEdit(object sender,
| GridViewCancelEditEventArgs e)
| void EditableGrid_RowCancelingEdit(object sender,
| GridViewCancelEditEventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| this.EditIndex = -1;
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_Sorting(object sender,
| GridViewSortEventArgs e)
| void EditableGrid_Sorting(object sender, GridViewSortEventArgs
e)
| {
| if (BypassGridEvent)
| return;
|
| MyPrj.SNF.Web.Controller.RequestContext
CurrentRequestContext
=
| Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
| MyPrj.SNF.Web.Controller.RequestContext;
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| CurrentRequestContext.CurrentControllerData;
|
| if (CSSortExpression !=
| ((GridViewSortEventArgs)e).SortExpression)
| CSSortDirection =
| MyPrj.SNF.Application.SortDirection.Ascending;
| else
| CSSortDirection = (CSSortDirection ==
| MyPrj.SNF.Application.SortDirection.Descending) ?
| MyPrj.SNF.Application.SortDirection.Ascending :
| MyPrj.SNF.Application.SortDirection.Descending;
|
| CSSortExpression =
((GridViewSortEventArgs)e).SortExpression;
| Array.Sort(DataSource as Array, new
| MyPrj.SNF.Application.ClassComparer(CSSortExpression,
CSSortDirection));
| this.DataBind();
| }
| #endregion
| #region void EditableGrid_PageIndexChanged(object sender,
EventArgs
| e)
| void EditableGrid_PageIndexChanged(object sender, EventArgs e)
| {
| if (BypassGridEvent)
| return;
|
| bool displayLastPage = false;
| //try
| //{
| if (((GridViewPageEventArgs)e).NewPageIndex > -1)
| PageIndex =
((GridViewPageEventArgs)e).NewPageIndex;
| else
| displayLastPage = true;
| IList list = DataSource as IList;
| if (displayLastPage)
| PageIndex = (int)Math.Ceiling(((double)list.Count /
| PageSize)) - 1;
| this.DataBind();
| //}
| //catch (Exception expGeneral)
| //{
| // throw;
| //}
| }
|
| #endregion
|
| #endregion
| #endregion
|
| #region void addColumns()
|
| private void addColumns()
| {
| if (MetaData == null)
| MetaData =
GridViewMetaData.GetGridViewMetaData(MetaDataId);
| Columns.Clear();
|
| #region - all the controls
|
| foreach (GridViewColumnMetaData columnMetaData in
| MetaData.Columns)
| {
|
| if (columnMetaData.IsDisplayed)
| {
| TemplateField columnField = new TemplateField();
| columnField.HeaderText = columnMetaData.HeaderText;
| if (columnMetaData.IsSortable)
| columnField.SortExpression =
| columnMetaData.SortPropertyName;
| columnField.ItemStyle.HorizontalAlign =
| columnMetaData.HorizontalAlign;
| columnField.ItemStyle.Width = columnMetaData.Width;
|
| if (GridMode == GridViewMode.Editable)
| {
| columnField.ItemTemplate = new
| GridViewTemplate(ListItemType.Item, MetaData, columnMetaData, this.ID);
| columnField.EditItemTemplate = new
| GridViewTemplate(ListItemType.EditItem, MetaData, columnMetaData,
this.ID);
|
| if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
| this.EditIndex < 0)
| {
| columnField.FooterTemplate = new
| GridViewTemplate(ListItemType.Footer, MetaData, columnMetaData,
this.ID);
| }
| }
| //Add the newly created bound field to the
GridView.
| Columns.Add(columnField);
| }
| }
|
| #endregion
|
| #region ------- add check box to each row if render
selection
is
| specified
|
|
| if ((MetaData.ShowSelectionInReadMode &&
| MyPrj.SNF.Web.Utils.Utils.InReadMode()) ||
| (MetaData.ShowSelectionInEditableMode &&
| !MyPrj.SNF.Web.Utils.Utils.InReadMode()))
| {
| GridViewColumnMetaData gvMetaData = new
| GridViewColumnMetaData(MetaData.SelectionPropertyName, "Select",
false);
| gvMetaData.ColumnType = "DomainObjectSelection";
| TemplateField selectionField = new TemplateField();
| selectionField.ItemTemplate = new
| GridViewTemplate(ListItemType.EditItem, MetaData, gvMetaData, this.ID);
| Columns.Add(selectionField);
| }
|
| #endregion
|
| }
|
|
|
| #endregion
|
| #region private string getControlIndex()
| private string getControlIndex(bool isFooterRow, int
dataRowIndex)
| {
| //This is not a real code......????
| //what do i do if there is no option..
| string controlIndex = "";
| int startCount = 0;
|
| if (isFooterRow)
| {
| startCount = 3;
| if (Rows.Count > 1)
| startCount = 3 + (Rows.Count - 1);
|
| if (startCount < 10)
| controlIndex = "$ctl0" + startCount.ToString() +
"$";
| else
| controlIndex = "$ctl" + startCount.ToString() +
"$";
| }
| else
| {
| startCount = 2 + dataRowIndex;
| if (startCount < 10)
| controlIndex = "$ctl0" + startCount.ToString() +
"$";
| else
| controlIndex = "$ctl" + startCount.ToString() +
"$";
| }
|
| return controlIndex;
| }
| #endregion
|
| #region private void addRowEvents(GridViewRow gr)
| private void addRowEvents(GridViewRow gr, bool isDeleted)
| {
|
| System.Web.UI.WebControls.LinkButton lb = new
| System.Web.UI.WebControls.LinkButton();
| if (!MyPrj.SNF.Web.Utils.Utils.InReadMode() &&
| ShowGridViewEditButtons)
| {
|
| #region //first add the data row events
|
| foreach (GridViewActionInfo actionInfo in
MetaData.Actions)
| {
| if (actionInfo.EventLocation ==
| GridViewActionInfo.EventLocationCode.DataRow)
| {
| lb = new
System.Web.UI.WebControls.LinkButton();
| lb.ID = "lnk" + this.ID + actionInfo.EventName;
| lb.Text = actionInfo.DisplayName;
| lb.CommandName =
actionInfo.CommandType.ToString();
| lb.ValidationGroup = this.ID;
| lb.CausesValidation =
actionInfo.CausesValidation;
| lb.Attributes.Add("href", "#");
| lb.OnClientClick =
getGridEventOnClickString(gr,
lb,
| false, gr.RowIndex, actionInfo.CausesValidation,
| actionInfo.ClientSideEventHandlerName, actionInfo.ActionParameters);
|
|
| if (actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.SNF)
| lb.OnClientClick =
| getSNFOnclickString(actionInfo, gr);
| else if (isDeleted && actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.Restore)
| {
| //If its deleted row then just show the
restore
| event and return
| removeActionCell(gr);
| //set the deleted row css class
| gr.CssClass = RemovedItemCssClass;
| lb.CommandArgument =
gr.RowIndex.ToString();
| addActionCell(gr, lb);
| addEmptyCell(gr);
| return;
| }
|
|
| bool addThis = false;
| if (EditIndex == gr.RowIndex &&
| (actionInfo.CommandType == GridViewActionInfo.CommandTypeCode.Update ||
| actionInfo.CommandType ==
| GridViewActionInfo.CommandTypeCode.Cancel))
| addThis = true;
| else if (EditIndex < 0 && EditIndex !=
gr.RowIndex
| && (actionInfo.CommandType != GridViewActionInfo.CommandTypeCode.Update
&&
| actionInfo.CommandType !=
| GridViewActionInfo.CommandTypeCode.Cancel && actionInfo.CommandType !=
| GridViewActionInfo.CommandTypeCode.Restore))
| addThis = true;
|
| if (addThis)
| addActionCell(gr, lb);
|
| }
| }
|
| #endregion
|
|
| #region //Add header row for the event
|
| TableHeaderCell c = new TableHeaderCell();
| c.Text = "";
| HeaderRow.Cells.Add(c);
|
| #endregion
|
| }
| }
| #endregion
|
| #region protected void RenderHiddenFieldsForActions()
| protected void RenderHiddenFieldsForActions()
| {
| if (MetaData == null || MetaData.Actions == null ||
| MetaData.Actions.Count < 1 || DataSource == null ||
| ((IList)DataSource).Count == 0)
| return;
|
| Hashtable hiddenFieldIds = new Hashtable();
| foreach (GridViewActionInfo actionInfo in MetaData.Actions)
| {
| if (actionInfo.ActionParameters != null)
| {
| foreach (string argumentName in
| actionInfo.ActionParameters.AllKeys)
| {
| if
|
(!hiddenFieldIds.ContainsKey(actionInfo.ActionParameters[argumentName]))
|
hiddenFieldIds[actionInfo.ActionParameters[argumentName]]
| = null;
| }
| }
| }
| foreach (string hiddenFieldId in hiddenFieldIds.Keys)
| {
| // Add the Hidden Field only if the page doesn't
already
| contain a control with same ID
| if (!Utils.Utils.IsControlOnPage(Page, hiddenFieldId))
| {
| //For ajax postback we will have to register the
hidden
| fields
| ScriptManager sm = ScriptManager.GetCurrent(Page);
| if (sm != null && sm.IsInAsyncPostBack)
|
System.Web.UI.ScriptManager.RegisterHiddenField(this,
| hiddenFieldId, string.Empty);
| else
|
Page.ClientScript.RegisterHiddenField(hiddenFieldId,
| string.Empty);
| }
| }
| }
| #endregion
|
| #region private string getSNFOnclickString(GridViewActionInfo
| actionInfo,GridViewRow gr)
| private string getSNFOnclickString(GridViewActionInfo
actionInfo,
| GridViewRow gr)
| {
| System.Text.StringBuilder sb = new
System.Text.StringBuilder();
| if (actionInfo.ActionParameters != null &&
| actionInfo.ActionParameters.Count > 0)
| {
| Type gridType = gr.DataItem.GetType();
| List<string> parameters = new List<string>();
| foreach (string propertyName in
actionInfo.ActionParameters.AllKeys)
| {
| if (actionInfo.ActionParameters[propertyName] !=
null)
| {
| string controlId =
| actionInfo.ActionParameters[propertyName];
| object propertyValue =
| gridType.GetProperty(propertyName).GetValue(gr.DataItem, null);
| if (PropertyUtilities.IsNullValue(propertyValue))
| propertyValue = string.Empty;
|
| parameters.Add(controlId + "~" + propertyValue);
| }
| }
| object[] args = new object[] { "this",
actionInfo.EventName,
| actionInfo.ClientSideEventHandlerName, string.Join("-",
| parameters.ToArray()), gr.RowIndex };
| return
|
string.Format("processGridViewEvent(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\")
",
| args);
| }
| return string.Empty;
| }
| #endregion
|
| #region private string getGridEventOnClickString()
| private string getGridEventOnClickString(GridViewRow gridRow,
| System.Web.UI.WebControls.LinkButton lb, bool isFooterRow, int
dataRowIndex,
| bool causeValidation, string clientSideEventHandlerName,
NameValueCollection
| actionParameters)
| {
| string validationGroup = "donotValidate";
| if (causeValidation)
| validationGroup = ID;
|
| string uniqId = this.UniqueID +
getControlIndex(isFooterRow,
| dataRowIndex) + lb.UniqueID;
| if (!string.IsNullOrEmpty(clientSideEventHandlerName))
| {
| List<string> parameters = new List<string>();
| parameters.Add("''");
| if (actionParameters != null && actionParameters.Count > 0)
| {
| parameters.Clear();
| Type gridType = gridRow.DataItem.GetType();
| foreach (string propertyName in actionParameters.AllKeys)
| {
| if (actionParameters[propertyName] != null)
| {
| string controlId = actionParameters[propertyName];
| object propertyValue =
| gridType.GetProperty(propertyName).GetValue(gridRow.DataItem, null);
| if (PropertyUtilities.IsNullValue(propertyValue))
| propertyValue = string.Empty;
| parameters.Add(controlId + "~" + propertyValue);
| }
| }
| }
|
| return string.Format("return
|
handleThenFireButtonEvent(\"{0}\",\"{1}\",\"{2}\",{3},\"{4}\",\"{5}\",\"{6}\
",\"{7}\",\"{8}\")",
| "this", GridPostbackEvent, clientSideEventHandlerName, "true",
| string.Join("-", parameters.ToArray()), validationGroup, uniqId,
| lb.CommandArgument, UpdatePanelId);
| }
| object[] args = new object[] { };
| return string.Format("return
|
validateAndFireButtonEventGroup(\"{0}\",\"{1}\",\"{2}\",\"{3}\",\"{4}\",\"{5
}\")",
| "this", GridPostbackEvent, validationGroup, uniqId, lb.CommandArgument,
| UpdatePanelId);
| }
| #endregion
|
| #region private TableRow addActionCell()
| private void addActionCell(GridViewRow gr,
| System.Web.UI.WebControls.LinkButton lb)
| {
| System.Web.UI.WebControls.TableCell tc = new TableCell();
| tc.Controls.Add(lb);
| ((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
| }
| #endregion
|
| #region private TableRow addEmptyCell()
| private void addEmptyCell(GridViewRow gr)
| {
| System.Web.UI.WebControls.TableCell tc = new TableCell();
| tc.Text = "&nbsp;&nbsp;";
| ((System.Web.UI.WebControls.TableRow)(gr)).Cells.Add(tc);
| }
| #endregion
|
| #region private void removeActionCell()
| private void removeActionCell(GridViewRow gr)
| {
| TableCell[] tmpcell = new TableCell[gr.Cells.Count];
| gr.Cells.CopyTo(tmpcell, 0);
| foreach (TableCell c in tmpcell)
| {
| System.Web.UI.Control ctrl = new
System.Web.UI.Control();
| if (c.Controls.Count > 0)
| ctrl = c.Controls[0];
| if (ctrl != null && ctrl.GetType().Name ==
"LinkButton")
| gr.Cells.Remove(c);
| }
|
| }
| #endregion
|
| #region private void setEachControlValues()
| private void setEachControlValues(System.Web.UI.Control ec,
object
| objItems)
| {
| switch (ec.GetType().Name)
| {
| case "TextBox":
| TextBox ctrlText = (TextBox)ec;
| setControlValue(ctrlText.ID, ctrlText.Text,
objItems);
| break;
| case "HiddenField":
| HiddenField ctrl = (HiddenField )ec;
| setControlValue(ctrl.ID, ctrl.Value, objItems);
| break;
| case "DateBox":
| DateBox ctrlDB = (DateBox)ec;
| setControlValue(ctrlDB.ID, ctrlDB.Text, objItems);
| break;
| case "DateTimeBox":
| DateTimeBox ctrlDTB = (DateTimeBox)ec;
| setControlValue(ctrlDTB.ID, ctrlDTB.Text,
objItems);
| break;
| case "CheckBox":
| CheckBox ctrlCheck = (CheckBox)ec;
| string valueToSet = "N";
| if (ctrlCheck.Checked)
| valueToSet = "Y";
| setControlValue(ctrlCheck.ID, valueToSet,
objItems);
| break;
| case "DropDownList":
| DropDownList ctrldrp = (DropDownList)ec;
| setControlValue(ctrldrp.ID, ctrldrp.SelectedValue,
| objItems);
| break;
| //also needs to set the ctrldrp.Text to the label
control
| //in the Items templates
| case "RadioButtonList":
| RadioButtonList ctrlRdo = (RadioButtonList)ec;
| setControlValue(ctrlRdo.ID, ctrlRdo.SelectedValue,
| objItems);
| break;
| case "Label":
| Label ctrlLabel = (Label)ec;
| setControlValue(ctrlLabel.ID, ctrlLabel.Text,
objItems);
| break;
| }
|
| }
|
| #endregion
|
| #region public GridViewMetaData MetaData
| private GridViewMetaData _MetaData;
| public GridViewMetaData MetaData
| {
| get { return _MetaData; }
| set { _MetaData = value; }
| }
| #endregion
|
| #region public string DomainObjectName
| private string _domainObjectName;
| public string DomainObjectName
| {
| get { return _domainObjectName; }
| set { _domainObjectName = value; }
| }
| #endregion
|
| #region public string DomainObjectListKey
| private string _DomainObjectListKey;
| public string DomainObjectListKey
| {
| get { return _DomainObjectListKey; }
| set { _DomainObjectListKey = value; }
| }
| #endregion
|
| #region public string MetaDataId
| private string _MetaDataId;
| public string MetaDataId
| {
| get { return _MetaDataId; }
| set { _MetaDataId = value; }
| }
| #endregion
|
| #region public string GridPostbackEvent
| private string _GridPostbackEvent;
| public string GridPostbackEvent
| {
| get { return _GridPostbackEvent; }
| set { _GridPostbackEvent = value; }
| }
| #endregion
|
| #region public bool BypassGridEvent
| private bool _BypassGridEvent = false;
| public bool BypassGridEvent
| {
| get { return _BypassGridEvent; }
| set { _BypassGridEvent = value; }
| }
| #endregion
|
| #region public bool ShowGridViewEditButtons
| private bool _ShowGridViewEditButtons;
| public bool ShowGridViewEditButtons
| {
| get { return _ShowGridViewEditButtons; }
| set { _ShowGridViewEditButtons = value; }
| }
| #endregion
|
| #region public string PropertyName
| private string _PropertyName = string.Empty;
| public string PropertyName
| {
| get { return _PropertyName; }
| set { _PropertyName = value; }
| }
| #endregion
|
| #region private Array getAddedItems()
| private Array getAddedItems(IList oldList, object addedItems)
| {
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| int arrayLength = 1;
| if (oldList != null && oldList.Count > 0)
| arrayLength = oldList.Count + 1;
| Array arrayItems =
Array.CreateInstance(addedItems.GetType(),
| arrayLength);
| int i = 0;
| if (oldList != null && oldList.Count > 0)
| {
| foreach (IDomainObject dm in oldList)
| {
| arrayItems.SetValue(dm, i);
| i++;
| }
| }
| arrayItems.SetValue(addedItems, i);
| return arrayItems;
| }
| #endregion
|
| #region private Array getUpdatedItems()
| private Array getUpdatedItems(IList oldList, object
updatedItems,
| Type domainObjectType, int rowIndex, string propertyToUpdate, bool
value)
| {
| //Also set the HasBeenEdited/HasBeenDeleted field with the
value
| true/false..
| setControlValue(propertyToUpdate, value, updatedItems);
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| Array arrayItems = Array.CreateInstance(domainObjectType,
| oldList.Count);
| int i = 0;
| foreach (IDomainObject dm in oldList)
| {
| if (i == rowIndex)//if the row index match the current object then
| replace the displayed column's values with the updated one
| {
| foreach (GridViewColumnMetaData columnMetaData in
MetaData.Columns)
| {
| if (columnMetaData.IsDisplayed)
| {
| PropertyUtilities.SetValue(dm, columnMetaData.PropertyName,
| PropertyUtilities.GetValue((IDomainObject)updatedItems,
| columnMetaData.PropertyName));
| }
| }
| }
| // also set hasbeenEdited/hasbeenDeleted with true/false
| setControlValue(propertyToUpdate, value, dm);
| arrayItems.SetValue(dm, i);
| i++;
| }
| return arrayItems;
| }
| #endregion
|
| #region private Array getRemovedItems()
| private Array getRemovedItems(IList oldList, object
removedItems,
| int rowIndex)
| {
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| Array arrayItemsToCopy =
| Array.CreateInstance(removedItems.GetType(), oldList.Count);
| Array arrayItems =
Array.CreateInstance(removedItems.GetType(),
| oldList.Count - 1);
| int i = 0;
| foreach (IDomainObject dm in oldList)
| {
| if (i != rowIndex)//if the row index match the current
| object then remove it(do not add to list)
| arrayItemsToCopy.SetValue(dm, i);
| i++;
| }
|
| int newArrayCount = 0;
| for (int j = 0; j < arrayItemsToCopy.Length; j++)
| {
| if (arrayItemsToCopy.GetValue(j) != null)
| {
| arrayItems.SetValue(arrayItemsToCopy.GetValue(j),
| newArrayCount);
| newArrayCount++;
| }
| }
|
| return arrayItems;
| }
| #endregion
|
| #region private void setControlValue()
| private void setControlValue(string propertyName, object value,
| object dObject)
| {
| PropertyInfo pi = null;
| pi = dObject.GetType().GetProperty(propertyName);
|
SNF.Model.PropertyUtilities.SetValue((IDomainObject)dObject,
pi,
| value);
|
| }
| #endregion
|
| #region private void setPropertyArrayValue()
| private void setPropertyArrayValue(Array arrayItems)
| {
|
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| Utils.Utils.GetCurrentControllerData();
| IDomainObject domainObject =
CurrentControllerData.DomainObject;
| PropertyInfo pi =
| domainObject.GetType().GetProperty(PropertyName);
| pi.SetValue(domainObject, arrayItems, null);
| }
| #endregion
|
| #region private void ProcessControllerEvent()
| private void ProcessControllerEvent(string eventName)
| {
| // Process the current event
|
| MyPrj.SNF.Web.Controller.RequestContext
CurrentRequestContext
=
| Context.Items[MyPrj.SNF.Application.Definition.RequestContext] as
| MyPrj.SNF.Web.Controller.RequestContext;
| MyPrj.SNF.Web.Controller.ControllerData
CurrentControllerData
=
| CurrentRequestContext.CurrentControllerData;
| CurrentControllerData.EventName = eventName;
|
| MyPrj.SNF.Web.Controller.ProcessResult pr =
| MyPrj.SNF.Web.Controller.EventProcessor.ProcessEvent(
| CurrentRequestContext, CurrentControllerData.StateId,
| CurrentControllerData.EventName);
|
| CurrentControllerData.EventName = pr.EventName; // Capture
the
| EventName from the result;
| }
| #endregion
|
| #region private void addAjaxSupport()
| private void addAjaxSupport(bool add)
| {
| ScriptManager
| sm = ScriptManager.GetCurrent(Page);
| if (sm == null)
| throw new HttpException("A ScriptManager control must
exist
| on the current page.");
| UpdatePanel updatePanel = new UpdatePanel();
| updatePanel.UpdateMode = UpdatePanelUpdateMode.Conditional;
| updatePanel.ID = "updatePanel" + this.ID;
| updatePanel.ContentTemplateContainer.Controls.Add(this);
| this.Controls.Add(updatePanel);
| }
| #endregion
|
| #region -- section to show/hide empty header and footer rows
|
| private GridViewRow _headerRow;
| private GridViewRow _footerRow;
|
| private bool _showHeaderWhenEmpty;
| private bool _showFooterWhenEmpty;
|
| public bool ShowHeaderWhenEmpty
| {
| get { return _showHeaderWhenEmpty; }
| set { _showHeaderWhenEmpty = value; }
| }
|
| public bool ShowFooterWhenEmpty
| {
| get { return _showFooterWhenEmpty; }
| set { _showFooterWhenEmpty = value; }
| }
|
| public override GridViewRow HeaderRow
| {
| get { return base.HeaderRow ?? _headerRow; }
| }
|
| public override GridViewRow FooterRow
| {
| get { return base.FooterRow ?? _footerRow; }
| }
|
| private void InitializeRow(GridViewRow row, DataControlField[]
| fields, TableRowCollection newRows)
| {
| GridViewRowEventArgs e = new GridViewRowEventArgs(row);
| InitializeRow(row, fields);
| OnRowCreated(e);
| newRows.Add(row);
| row.DataBind();
| OnRowDataBound(e);
| row.DataItem = null;
| }
|
| #endregion
|
| #region protected void SetupStyleAndBehaviour ()
| protected virtual void SetupStyleAndBehaviour()
| {
| EnableViewState = false;
| AutoGenerateColumns = false;
|
| AllowSorting = true;
| AllowPaging = true;
| EnableSortingAndPagingCallbacks = false;
| AutoGenerateSelectButton = false;
| AutoGenerateDeleteButton = false;
| AutoGenerateEditButton = false;
|
| ShowHeader = true;
| ShowFooter = true;
| EmptyDataText = "No records found";
|
| CssClass = "grid";
| CellPadding = 3;
| CellSpacing = 0;
| GridLines = GridLines.Horizontal;
|
| PageSize = 20;
| PagerStyle.CssClass = "gridPager";
| PagerSettings.FirstPageText = "<<";
| PagerSettings.PreviousPageText = "<";
| PagerSettings.NextPageText = ">";
| PagerSettings.LastPageText = ">>";
| PagerSettings.PageButtonCount = 10;
| PagerSettings.Mode = PagerButtons.NumericFirstLast;
|
| RowStyle.CssClass = "gridRow";
| SelectedRowStyle.CssClass = "gridSelectedRow";
| HeaderStyle.CssClass = "gridViewHeader";
| FooterStyle.CssClass = "gridfooter";
| AlternatingRowStyle.CssClass = "gridAlternatingRow";
| RemovedItemCssClass = "gridDeletedRow";
| }
| #endregion
|
| #region public GridViewMode GridMode
| private GridViewMode _GridMode = GridViewMode.Editable;
| /// <summary>
| ///
| /// </summary>
| public GridViewMode GridMode
| {
| get { return _GridMode; }
| set { _GridMode = value; }
| }
| #endregion
|
| #region Custom Management of SortExpression & SortDirection
|
| #region public string CSSortExpression
| private string _CSSortExpression;
| public string CSSortExpression
| {
| get { return _CSSortExpression; }
| set { _CSSortExpression = value; }
| }
| #endregion
|
| #region public SortDirection CSSortDirection
| private MyPrj.SNF.Application.SortDirection _CSSortDirection;
| public MyPrj.SNF.Application.SortDirection CSSortDirection
| {
| get { return _CSSortDirection; }
| set { _CSSortDirection = value; }
| }
| #endregion
|
| #endregion Custom Management of SortExpression & SortDirection
|
| #region public string RemovedItemCssClass
| private string _RemovedItemCssClass;
| public string RemovedItemCssClass
| {
| get { return _RemovedItemCssClass; }
| set { _RemovedItemCssClass = value; }
| }
| #endregion
|
| #region public string UpdatePanelId
| private string _UpdatePanelId;
| public string UpdatePanelId
| {
| get { return _UpdatePanelId; }
| set { _UpdatePanelId = value; }
| }
| #endregion
| }
| }
|
|
|
| | > hello, I have 2 new issues:
| >
| > 1. My control is overriding OnRowCreated and it calls
base.OnRowCreated
| > and on my aspx.cs page i am attaching an event handler to this
RowCreated
| > but it is not running. I also tried to add an event handler to
| > RowDataBound and calling base.OnRowDataBound and it doesnt get called
in
| > aspx.cs either.
| >
| > What could be the cause of this? I dont understand since i'm calling
base
| > implementation (which seeing the code thru reflector it calls any
attached
| > handlers)
| >
| > 2. This is related somehow to first point. As stated in the first
problem
| > you already resolved, i attached event handlers in my custom control
| > instead of overriding them and that caused my event handlers on
aspx.cs
| > page to be called correctly for most of them. When i tried to attach
event
| > handler for RowCreated in custom control, it is not called, but when
I
| > override OnRowCreated it is called. Even when I attached event
handler
for
| > RowCreated in custom control AND aspx.cs page, neither were called.
The
| > grid events that I am currently using successfully on aspx.cs are
| > RowUpdating and RowEditing, both of which are also attached event
handlers
| > in custom control.
| >
| > thanks
| >
| > | >> Hi,
| >>
| >> Do you have any further questions? If you have please provide some
code
| >> so
| >> that I can test it on my side.
| >>
| >> Regards,
| >> Allen Chen
| >> Microsoft Online Community Support
| >>
| >> --------------------
| >> | From: "TS" <[email protected]>
| >> | References: <#[email protected]>
| >> <#[email protected]>
| >> <[email protected]>
| >> <[email protected]>
| >> | Subject: Re: overriding GridView.OnRowDeleting - can call
registered
| >> event handlers
| >> | Date: Wed, 22 Oct 2008 11:07:08 -0500
| >> | Lines: 223
| >> | X-Priority: 3
| >> | X-MSMail-Priority: Normal
| >> | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | X-RFC2646: Format=Flowed; Original
| >> | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | Message-ID: <[email protected]>
| >> | Newsgroups:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | NNTP-Posting-Host: 168.38.106.193
| >> | Path:
TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| >> | Xref: TK2MSFTNGHUB02.phx.gbl
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols:1142
| >> | X-Tomcat-NG:
microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> |
| >> | that did it, but for some reason the delegates for DataBinding was
not
| >> | getting called, but that method does call base.DataBind, so make
it
| >> | overridable is OK, though not sure why it wasnt getting called
| >> |
message
| >> | | >> | > Hi,
| >> | >
| >> | > Thanks for your clarification. To achieve your requirement I
would
| >> suggest
| >> | > you attach an event handler in the constructor method instead of
| >> | > overriding
| >> | > the OnRowDeleting method.
| >> | >
| >> | > public class MyGridView : GridView
| >> | > {
| >> | >
| >> | > public MyGridView()
| >> | > {
| >> | > this.RowDeleting += new
| >> | > GridViewDeleteEventHandler(MyGridView_RowDeleting);
| >> | > }
| >> | > void MyGridView_RowDeleting(object sender,
| >> GridViewDeleteEventArgs
| >> | > e)
| >> | > {
| >> | > //Your code here
| >> | > }
| >> | > }
| >> | >
| >> | > Please have a try and let me know if it's what you need.
| >> | >
| >> | > Regards,
| >> | > Allen Chen
| >> | > Microsoft Online Support
| >> | >
| >> | > --------------------
| >> | > | From: "TS" <[email protected]>
| >> | > | References: <#[email protected]>
| >> | > <#[email protected]>
| >> | > | Subject: Re: overriding GridView.OnRowDeleting - can call
| >> registered
| >> | > event handlers
| >> | > | Date: Tue, 21 Oct 2008 11:38:04 -0500
| >> | > | Lines: 136
| >> | > | X-Priority: 3
| >> | > | X-MSMail-Priority: Normal
| >> | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | > | X-RFC2646: Format=Flowed; Original
| >> | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | > | Message-ID: <[email protected]>
| >> | > | Newsgroups:
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | NNTP-Posting-Host: 168.38.106.193
| >> | > | Path:
| >> TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
| >> | > | Xref: TK2MSFTNGHUB02.phx.gbl
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols:1140
| >> | > | X-Tomcat-NG:
| >> microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > |
| >> | > | So it looks like the "else if" section of the posted code
below
is
| >> | > getting
| >> | > | run, which throws an exception and this is why that
| >> base.OnRowDeleting
| >> | > is
| >> | > | commented out. Our custom OnRowDeleting does a lot of stuff in
it
| >> that
| >> | > is
| >> | > | common to every grid. The only thing the base class does is
call
| >> any
| >> | > | registered delegates. So if we dont add event handler in aspx
page
| >> for
| >> | > | onRowDeleting, the base class will throw this error.
| >> | > |
| >> | > | We want to not have to attach custom event handlers in every
aspx
| >> page
| >> | > that
| >> | > | uses the grid control and just let our custom gridView handle
all
| >> the
| >> | > | processing in all the grid events (onRowEditing,
onRowUpdating,
| >> | > | onRowDeleting, etc.), but I need to be able to support
overriding
| >> this
| >> | > | behavior sometimes by adding a custom event handler in my aspx
| >> page.
| >> | > |
| >> | > | Could I override the each Event Handler's add/remove
properties
so
| >> that
| >> | > i
| >> | > | can handle the Event[] collection myself and then i'll be able
to
| >> call
| >> | > the
| >> | > | individually registered delegates?
| >> | > | public event GridViewDeleteEventHandler RowDeleting
| >> | > |
| >> | > | {
| >> | > |
| >> | > | add
| >> | > |
| >> | > | {
| >> | > |
| >> | > | base.Events.AddHandler(EventRowDeleting, value);
| >> | > |
| >> | > | }
| >> | > |
| >> | > | remove
| >> | > |
| >> | > | {
| >> | > |
| >> | > | base.Events.RemoveHandler(EventRowDeleting, value);
| >> | > |
| >> | > | }
| >> | > |
| >> | > | }
| >> | > |
| >> | > |
| >> message
| >> | > | | >> | > | > Hi,
| >> | > | >
| >> | > | > As you said, it's a private field so we cannot access it in
the
| >> custom
| >> | > | > GridView. I think we'd better focus on your following
statement:
| >> | > | >
| >> | > | > I have a custom GridView and it overrides onRowDeleting and
| >> doesn't
| >> | > | > call base.OnRowDeleting because the person implementing had
| >> | > undesirable
| >> | > | > effects.
| >> | > | >
| >> | > | > Could you tell me what're the undesirable effects and your
| >> requirement
| >> | > as
| >> | > | > well? I think if we can eliminate them this issue can be
worked
| >> | > around.
| >> | > | >
| >> | > | > Regards,
| >> | > | > Allen Chen
| >> | > | > Microsoft Online Support
| >> | > | >
| >> | > | > Delighting our customers is our #1 priority. We welcome your
| >> comments
| >> | > and
| >> | > | > suggestions about how we can improve the support we provide
to
| >> you.
| >> | > Please
| >> | > | > feel free to let my manager know what you think of the level
of
| >> | > service
| >> | > | > provided. You can send feedback directly to my manager at:
| >> | > | > (e-mail address removed).
| >> | > | >
| >> | > | > ==================================================
| >> | > | > Get notification to my posts through email? Please refer to
| >> | > | >
| >> | >
| >>
http://msdn.microsoft.com/en-us/subscriptions/aa948868.aspx#notifications.
| >> | > | >
| >> | > | > Note: The MSDN Managed Newsgroup support offering is for
| >> non-urgent
| >> | > issues
| >> | > | > where an initial response from the community or a Microsoft
| >> Support
| >> | > | > Engineer within 1 business day is acceptable. Please note
that
| >> each
| >> | > follow
| >> | > | > up response may take approximately 2 business days as the
support
| >> | > | > professional working with you may need further investigation
to
| >> reach
| >> | > the
| >> | > | > most efficient resolution. The offering is not appropriate
for
| >> | > situations
| >> | > | > that require urgent, real-time or phone-based interactions
or
| >> complex
| >> | > | > project analysis and dump analysis issues. Issues of this
nature
| >> are
| >> | > best
| >> | > | > handled working with a dedicated Microsoft Support Engineer
by
| >> | > contacting
| >> | > | > Microsoft Customer Support Services (CSS) at
| >> | > | >
| >> | >
| >>
http://support.microsoft.com/select/default.aspx?target=assistance&ln=en-us.
| >> | > | > ==================================================
| >> | > | > This posting is provided "AS IS" with no warranties, and
confers
| >> no
| >> | > | > rights.
| >> | > | >
| >> | > | > --------------------
| >> | > | > | From: "TS" <[email protected]>
| >> | > | > | Subject: overriding GridView.OnRowDeleting - can call
| >> registered
| >> | > event
| >> | > | > handlers
| >> | > | > | Date: Mon, 20 Oct 2008 16:17:30 -0500
| >> | > | > | Lines: 24
| >> | > | > | X-Priority: 3
| >> | > | > | X-MSMail-Priority: Normal
| >> | > | > | X-Newsreader: Microsoft Outlook Express 6.00.2900.3028
| >> | > | > | X-RFC2646: Format=Flowed; Original
| >> | > | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028
| >> | > | > | Message-ID: <#[email protected]>
| >> | > | > | Newsgroups:
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | > | NNTP-Posting-Host: 168.38.106.193
| >> | > | > | Path:
| >> | > TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP02.phx.gbl
| >> | > | > | Xref: TK2MSFTNGHUB02.phx.gbl
| >> | > | >
microsoft.public.dotnet.framework.aspnet.buildingcontrols:1138
| >> | > | > | X-Tomcat-NG:
| >> | > microsoft.public.dotnet.framework.aspnet.buildingcontrols
| >> | > | > |
| >> | > | > | Hello, I have a custom GridView and it overrides
onRowDeleting
| >> and
| >> | > | > doesn't
| >> | > | > | call base.OnRowDeleting because the person implementing
had
| >> | > undesirable
| >> | > | > | effects. the problem is I now when clients of this control
| >> register
| >> | > | > their
| >> | > | > | own event handlers for RowDeleting, it is never raised.
| >> | > | > |
| >> | > | > | I'm trying to add lines 1 - 5 to my overriden
OnRowDeleting
| >> method
| >> | > but
| >> | > | > can't
| >> | > | > | because the key accessed in base.Events is
EventRowDeleting,
| >> which
| >> | > is
| >> | > an
| >> | > | > | object that is a private constant that i dont have access
to
in
| >> my
| >> | > | > derived
| >> | > | > | control.
| >> | > | > |
| >> | > | > | How do I get a handle to any event handlers so I can call
| >> them???
| >> | > | > |
| >> | > | > | // this is the dissasembled method for GridView:
| >> | > | > | protected virtual void
OnRowDeleting(GridViewDeleteEventArgs
| >> e){
| >> | > | > bool
| >> | > | > | isBoundUsingDataSourceID = base.IsBoundUsingDataSourceID;1
| >> | > | > | GridViewDeleteEventHandler handler =
| >> (GridViewDeleteEventHandler)
| >> | > | > | base.Events[EventRowDeleting];2 if (handler != null)3
{4
| >> | > | > | handler(this, e);5 } else if
(!isBoundUsingDataSourceID
| >> &&
| >> | > | > !e.Cancel)
| >> | > | > | { throw new
| >> | > | > HttpException(SR.GetString("GridView_UnhandledEvent",
| >> | > | > | new object[] { this.ID, "RowDeleting" })); }}
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | > |
| >> | > | >
| >> | > |
| >> | > |
| >> | > |
| >> | >
| >> |
| >> |
| >> |
| >>
| >
| >
|
|
|
 

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