Formview DropDownList bug??

[Karl-Inge Reknes]

I have a page with a formview control who datasource is a objectdatasource.
In edit mode template I have tree dropdownlist; Year, Month and Day. Each
dropdownlist i populated from an objectdatasource object and is bind to
column in the formview control objectdatasource. The objectdatasource object
for dropdownlist Day have 2 arguments; Year and Month. The dropdownlist day
is populated with correct number of days for that month and year.

When changing Year or Month this error appear:

Databinding methods such as Eval(), XPath(), and Bind() can only be used in
the context of a databound control.

If I remove the binding for dropdownlist Day the error doesn’t appear, but
then I not able to save the Day Column

Is there anybody who can help me?

Karl-Inge Reknes

 

[Phillip Williams]

Hi Karl-Inge,

I met the same situation in using dependent dropdownlist within the
EditItemTemplate where 2-way databinding is attempted. The solution is to
remove the 2-way databinding from the dependent dropdownlist and replace it
with customized code during processing the ItemUpdating event.

For example if one had 2 dropdownlists where one had the country and the
other had the City; where the City dropdownlist re-populate every time the
Country selection is changed, then upon ItemUpdating I would do something
like this:
void FormView1_ItemUpdating(object sender, FormViewUpdateEventArgs e)
{
string strCity=
((DropDownList))((FormView)sender).FindControl("ddlCity")).SelectedValue;
e.NewValues[1] = strCity; //assuming the second value being updated is
the City
e.Cancel = false; //this would confirm that the update should continue
}

 

[Phillip Williams]

I missed to note that in the solution described below I have used a label
that was 2-way databound to the City instead of the dropdownlist. The label
was styled as hidden. Its purpose is to keep the number of e.NewValues to
the same as if I had the dropdownlist 2-way databound.
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com

Hi Karl-Inge,

I met the same situation in using dependent dropdownlist within the
EditItemTemplate where 2-way databinding is attempted. The solution is to
remove the 2-way databinding from the dependent dropdownlist and replace it
with customized code during processing the ItemUpdating event.

For example if one had 2 dropdownlists where one had the country and the
other had the City; where the City dropdownlist re-populate every time the
Country selection is changed, then upon ItemUpdating I would do something
like this:
void FormView1_ItemUpdating(object sender, FormViewUpdateEventArgs e)
{
string strCity=
((DropDownList))((FormView)sender).FindControl("ddlCity")).SelectedValue;
e.NewValues[1] = strCity; //assuming the second value being updated is
the City
e.Cancel = false; //this would confirm that the update should continue
}
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com

I have a page with a formview control who datasource is a objectdatasource.
In edit mode template I have tree dropdownlist; Year, Month and Day. Each
dropdownlist i populated from an objectdatasource object and is bind to
column in the formview control objectdatasource. The objectdatasource object
for dropdownlist Day have 2 arguments; Year and Month. The dropdownlist day
is populated with correct number of days for that month and year.

When changing Year or Month this error appear:

Databinding methods such as Eval(), XPath(), and Bind() can only be used in
the context of a databound control.

If I remove the binding for dropdownlist Day the error doesn’t appear, but
then I not able to save the Day Column

Is there anybody who can help me?

Karl-Inge Reknes

 

[Karl-Inge Reknes]

Thanks Phillip.

Karl-Inge

I missed to note that in the solution described below I have used a label
that was 2-way databound to the City instead of the dropdownlist. The label
was styled as hidden. Its purpose is to keep the number of e.NewValues to
the same as if I had the dropdownlist 2-way databound.
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com

Hi Karl-Inge,

I met the same situation in using dependent dropdownlist within the
EditItemTemplate where 2-way databinding is attempted. The solution is to
remove the 2-way databinding from the dependent dropdownlist and replace it
with customized code during processing the ItemUpdating event.

For example if one had 2 dropdownlists where one had the country and the
other had the City; where the City dropdownlist re-populate every time the
Country selection is changed, then upon ItemUpdating I would do something
like this:
void FormView1_ItemUpdating(object sender, FormViewUpdateEventArgs e)
{
string strCity=
((DropDownList))((FormView)sender).FindControl("ddlCity")).SelectedValue;
e.NewValues[1] = strCity; //assuming the second value being updated is
the City
e.Cancel = false; //this would confirm that the update should continue
}
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com

I have a page with a formview control who datasource is a objectdatasource.
In edit mode template I have tree dropdownlist; Year, Month and Day. Each
dropdownlist i populated from an objectdatasource object and is bind to
column in the formview control objectdatasource. The objectdatasource object
for dropdownlist Day have 2 arguments; Year and Month. The dropdownlist day
is populated with correct number of days for that month and year.

When changing Year or Month this error appear:

Databinding methods such as Eval(), XPath(), and Bind() can only be used in
the context of a databound control.

If I remove the binding for dropdownlist Day the error doesn’t appear, but
then I not able to save the Day Column

Is there anybody who can help me?

Karl-Inge Reknes

 

[Phillip Williams]

You are quite welcome, Karl-Inge. I just managed to put a demo of the
solution I proposed below, with the complete source code, at this link:
http://www.webswapp.com/demos/formView1.aspx

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com

Thanks Phillip.

Karl-Inge

I missed to note that in the solution described below I have used a label
that was 2-way databound to the City instead of the dropdownlist. The label
was styled as hidden. Its purpose is to keep the number of e.NewValues to
the same as if I had the dropdownlist 2-way databound.
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com

Hi Karl-Inge,

I met the same situation in using dependent dropdownlist within the
EditItemTemplate where 2-way databinding is attempted. The solution is to
remove the 2-way databinding from the dependent dropdownlist and replace it
with customized code during processing the ItemUpdating event.

For example if one had 2 dropdownlists where one had the country and the
other had the City; where the City dropdownlist re-populate every time the
Country selection is changed, then upon ItemUpdating I would do something
like this:
void FormView1_ItemUpdating(object sender, FormViewUpdateEventArgs e)
{
string strCity=
((DropDownList))((FormView)sender).FindControl("ddlCity")).SelectedValue;
e.NewValues[1] = strCity; //assuming the second value being updated is
the City
e.Cancel = false; //this would confirm that the update should continue
}
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com


:

I have a page with a formview control who datasource is a objectdatasource.
In edit mode template I have tree dropdownlist; Year, Month and Day. Each
dropdownlist i populated from an objectdatasource object and is bind to
column in the formview control objectdatasource. The objectdatasource object
for dropdownlist Day have 2 arguments; Year and Month. The dropdownlist day
is populated with correct number of days for that month and year.

When changing Year or Month this error appear:

Databinding methods such as Eval(), XPath(), and Bind() can only be used in
the context of a databound control.

If I remove the binding for dropdownlist Day the error doesn’t appear, but
then I not able to save the Day Column

Is there anybody who can help me?

Karl-Inge Reknes

 

[dwg1011]

Phillip,

Have you considered posting a DetailsView version of the code on your web
site. I am having a devil of a time getting a dependent ddl to work. I have
tried all kinds of variations. My latest version I tried putting the
<asp:sqldatasource> 's underneath the EditTemplate (and InsertTemplates) for
each ddl (1 & 2), but ASP.net is complaining that the control can not be
found. Any help would be greatly appreciated.

David

You are quite welcome, Karl-Inge. I just managed to put a demo of the
solution I proposed below, with the complete source code, at this link:
http://www.webswapp.com/demos/formView1.aspx

--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com

Thanks Phillip.

Karl-Inge

I missed to note that in the solution described below I have used a label
that was 2-way databound to the City instead of the dropdownlist. The label
was styled as hidden. Its purpose is to keep the number of e.NewValues to
the same as if I had the dropdownlist 2-way databound.
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com


:

Hi Karl-Inge,

I met the same situation in using dependent dropdownlist within the
EditItemTemplate where 2-way databinding is attempted. The solution is to
remove the 2-way databinding from the dependent dropdownlist and replace it
with customized code during processing the ItemUpdating event.

For example if one had 2 dropdownlists where one had the country and the
other had the City; where the City dropdownlist re-populate every time the
Country selection is changed, then upon ItemUpdating I would do something
like this:
void FormView1_ItemUpdating(object sender, FormViewUpdateEventArgs e)
{
string strCity=
((DropDownList))((FormView)sender).FindControl("ddlCity")).SelectedValue;
e.NewValues[1] = strCity; //assuming the second value being updated is
the City
e.Cancel = false; //this would confirm that the update should continue
}
--
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com


:

I have a page with a formview control who datasource is a objectdatasource.
In edit mode template I have tree dropdownlist; Year, Month and Day. Each
dropdownlist i populated from an objectdatasource object and is bind to
column in the formview control objectdatasource. The objectdatasource object
for dropdownlist Day have 2 arguments; Year and Month. The dropdownlist day
is populated with correct number of days for that month and year.

When changing Year or Month this error appear:

Databinding methods such as Eval(), XPath(), and Bind() can only be used in
the context of a databound control.

If I remove the binding for dropdownlist Day the error doesn’t appear, but
then I not able to save the Day Column

Is there anybody who can help me?

Karl-Inge Reknes