Hi Novus,
Any further progress on this or does the things in my last reply helps a
little? If still anything we can help, please feel free to post here.
Thanks,
Steven Cheng
Microsoft Online Support
Get Secure!
www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
--------------------
| X-Tomcat-ID: 133076641
| References: <
[email protected]>
<
[email protected]>
<
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<
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<
[email protected]>
| MIME-Version: 1.0
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| Content-Transfer-Encoding: 7bit
| From: (e-mail address removed) (Steven Cheng[MSFT])
| Organization: Microsoft
| Date: Fri, 11 Nov 2005 07:57:11 GMT
| Subject: RE: Finding a way to bind ASP.NET controls(two way) to a
typed-dat
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.webcontrols
| Message-ID: <
[email protected]>
| Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols
| Lines: 354
| Path: TK2MSFTNGXA02.phx.gbl
| Xref: TK2MSFTNGXA02.phx.gbl
microsoft.public.dotnet.framework.aspnet.webcontrols:31078
| NNTP-Posting-Host: TOMCATIMPORT1 10.201.218.122
|
| Hi Novus,
|
| As for Custom DataSource control, there seems haven't detailed reference
or
| tutorial on this. What I've found is that we should at least implement
the
| IDataSource interface. And for detailed info on creating a well-defined
| datasource control, I think the best means maybe view the .net buildin
| datasource control's proto type. If you have interents, you can use
| reflector tool to get details view on those buildin datasource controls.
|
| For deisgner time support, here are some reference in MSDN which maybe
| helpful:
|
| #Simplify UI Development with Custom Designer Actions in Visual Studio
|
http://msdn.microsoft.com/msdnmag/issues/05/07/DesignerActions/default.aspx
|
| #Sample Control Design
|
http://msdn2.microsoft.com/en-us/library/d0etxzd8er with Action Lists and
| Services
|
| Thanks,
|
| Steven Cheng
| Microsoft Online Support
|
| Get Secure!
www.microsoft.com/security
| (This posting is provided "AS IS", with no warranties, and confers no
| rights.)
|
|
|
| --------------------
| | Thread-Topic: Finding a way to bind ASP.NET controls(two way) to a
| typed-dat
| | thread-index: AcXmKLHPy69rEeB5RXKmmvrFt5t70A==
| | X-WBNR-Posting-Host: 213.73.245.168
| | From: "=?Utf-8?B?bm92dXM=?=" <
[email protected]>
| | References: <
[email protected]>
| <
[email protected]>
| <
[email protected]>
| <
[email protected]>
| | Subject: RE: Finding a way to bind ASP.NET controls(two way) to a
| typed-dat
| | Date: Thu, 10 Nov 2005 10:58:10 -0800
| | Lines: 274
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[email protected]>
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| | Xref: TK2MSFTNGXA02.phx.gbl
| microsoft.public.dotnet.framework.aspnet.webcontrols:31062
| | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.webcontrols
| |
| | on the microsoft newsgroup i asked the same question.
| |
| | There i understand that making my own datasource is the best approach.
| |
| | I have tried that but it is hard to find any information or
documentation
| | about it. Especially if i want to use the design view as well.
| |
| | Can you please tell me where i can find more? Or even better could you
| send
| | me a proto-type?
| |
| | thanx
| |
| | "Steven Cheng[MSFT]" wrote:
| |
| | > Thanks for your response novus,
| | >
| | > Yes, I totally agree with you on the "strength" and weakness between
| using
| | > a Custom DataSource control and a wrapper class.... And a
well-defined
| | > custom datasource will greatly improve the reusability and
flexibility.
| | >
| | > BTW, as for the below comments you added:
| | > ==================
| | > Another thing about the ObjectDataSource is that it’s only
| capable of
| | > manipulating the defaultview. So if I’am working with three
| tables on one
| | > WebForm, I have to add three ObjectDataSources to do the job.
| | > ==================
| | >
| | > I have some different opinions, maybe we're considering the problem
| from
| | > different perspective:
| | >
| | > IMO, I think that we should let the ObjectDataSource control do less
| things
| | > and let our custom class do more things so that we can make the
| | > ObjectDataSource more common and simple. So as for the problem in
this
| | > thread, my "wrapper class" approach is just let our custom class do
| more
| | > things to match the ObjectDataSource control. While your approach is
| making
| | > change on the ObjectDataSource so as to let datasource match our
custom
| | > object. Do you think so?
| | >
| | > Anyway, I think both means has its own highlight and drawback. And in
| your
| | > application ,since there may have many such custom dataaccessing
| objects
| | > which need to behavior like the same style(storing in temp memory
cache
| and
| | > batch updating ....), then do the customizing on the datasource
control
| is
| | > more suitable.
| | >
| | > Just some of my opinions.
| | >
| | > Thanks,
| | >
| | > Steven Cheng
| | > Microsoft Online Support
| | >
| | > Get Secure!
www.microsoft.com/security
| | > (This posting is provided "AS IS", with no warranties, and confers no
| | > rights.)
| | >
| | >
| | > --------------------
| | > | Thread-Topic: Finding a way to bind ASP.NET controls(two way) to a
| | > typed-dat
| | > | thread-index: AcXlFQyGikep/CNAT9+CWDpaOM12kQ==
| | > | X-WBNR-Posting-Host: 212.187.78.77
| | > | From: "=?Utf-8?B?bm92dXM=?=" <
[email protected]>
| | > | References: <
[email protected]>
| | > <
[email protected]>
| | > | Subject: RE: Finding a way to bind ASP.NET controls(two way) to a
| | > typed-dat
| | > | Date: Wed, 9 Nov 2005 02:05:01 -0800
| | > | Lines: 149
| | > | Message-ID: <
[email protected]>
| | > | MIME-Version: 1.0
| | > | Content-Type: text/plain;
| | > | charset="Utf-8"
| | > | Content-Transfer-Encoding: 8bit
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| | > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols
| | > | NNTP-Posting-Host: TK2MSFTNGXA03.phx.gbl 10.40.2.250
| | > | Path: TK2MSFTNGXA02.phx.gbl!TK2MSFTNGXA03.phx.gbl
| | > | Xref: TK2MSFTNGXA02.phx.gbl
| | > microsoft.public.dotnet.framework.aspnet.webcontrols:31025
| | > | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.webcontrols
| | > |
| | > | Hi Steven,
| | > |
| | > | Your description of the problem is correct.
| | > |
| | > | In your post you mention that two-way data binding is not supported
| on
| | > | WebForms? Maybe not as it’s working technically for
WinForms,
| but for
| | > example
| | > | the FormView control does support two-way databinding or do I miss
| | > something.
| | > |
| | > | I don’t understand why a custom datasource wouldn’t
| address my
| | > problem. I
| | > | already have made a start writing one and it does the job but it
isn?
¢â‚¬â„¢t
| | > foul
| | > | proof yet. By writing my own datasource I don’t have to
write
| all the
| | > wrapper
| | > | classes for my business objects an maintain them in the future as
my
| | > business
| | > | object change. The custom datasource can cache the typed dataset in
| | > session.
| | > | I also think it’s more time consuming to maintain a dozen of
| wrapper
| | > classes
| | > | in the future than writing a good datasource once. Do you now where
I
| can
| | > | find more information about writing a custom datasource other than
| what
| | > the
| | > | MSDN documentation provide.
| | > |
| | > | Another thing about the ObjectDataSource is that it’s only
| capable of
| | > | manipulating the defaultview. So if I’am working with three
| tables on
| | > one
| | > | WebForm, I have to add three ObjectDataSources to do the job.
| | > |
| | > | It feels that the wrapper class solution will be the quickest
| solution
| | > for
| | > | now but isn’t for the future.
| | > |
| | > |
| | > | "Steven Cheng[MSFT]" wrote:
| | > |
| | > | > Hi Novus,
| | > | >
| | > | > Welcome to ASPNET newsgroup.
| | > | > From your description, you're developing a data manipulating web
| page
| | > | > through the new ASP.NET 2.0 Databound control and DataSource
| control.
| | > Also,
| | > | > since your datasource is a typed Dataset, you'd like to use
| | > | > ObjectDataSource, however, currently since the default datasource
| | > control
| | > | > only support updating one record directly to backend data storage
| each
| | > | > time, you're wondering a good means to make the dataset batch
| updated
| | > | > (update the whole dataset to database at one time), yes? If
| anything I
| | > | > didn't understand well, please feel free to let me know.
| | > | >
| | > | > As for this question, based on my experience, creating a custom
| | > datasource
| | > | > control will be very time comsumed and won't quite address your
| | > problem.
| | > | > Because the the limitation on your problem is actually due to the
| | > WebForm
| | > | > programming model, in which databinding is one-way only (unlike
in
| | > winform
| | > | > which mantains two way databinding between databound control and
| | > in-memory
| | > | > datasource objects.... In webform the databound control (such as
| | > GridView,
| | > | > DataList... ) will bind each data record in to its control item
and
| | > store
| | > | > the values in viewstate (finally flush to clientside), so there
is
| no
| | > | > DataSet or other database object mantained by them. Also, when
| | > performing
| | > | > data updating , the DataBound control will provide single
| | > item(record)'s
| | > | > datas (old and new values of each columns ..... ).
| | > | >
| | > | > Currently, my suggestion on this is that we can create a wrapper
| class
| | > | > which work as a facade between the ObjectDataSource control and
the
| | > | > TypedDataSet object. We set this class as the object Type in the
| | > | > DataSource control, and this class also has the corresponding
| select,
| | > | > update... delete method... However, in this custom class's
| select
| | > | > method, we get the Typed Dataset and cache it in application's
| memory
| | > | > (either SessionState or Application Cache...), then in the update
| or
| | > delete
| | > | > method, we perform single record update or delete in the
in-memorty
| | > cached
| | > | > dataset( not update directly to backend db.). And in the end we
can
| | > update
| | > | > the Whole Typed Dataset by another method on the custom
classs....
| | > | > How do you think of this?
| | > | >
| | > | > If there're any other ideas or questions, please feel free to
post
| | > here.
| | > | > Thanks,
| | > | >
| | > | >
| | > | > Steven Cheng
| | > | > Microsoft Online Support
| | > | >
| | > | > Get Secure!
www.microsoft.com/security
| | > | > (This posting is provided "AS IS", with no warranties, and
confers
| no
| | > | > rights.)
| | > | >
| | > | >
| | > | >
| | > | > --------------------
| | > | > | Thread-Topic: Finding a way to bind ASP.NET controls(two way)
to
| a
| | > | > typed-dataset
| | > | > | thread-index: AcXkbz4CSemtquzmQNyHP9g/A72JUA==
| | > | > | X-WBNR-Posting-Host: 212.187.78.77
| | > | > | From: "=?Utf-8?B?bm92dXM=?=" <
[email protected]>
| | > | > | Subject: Finding a way to bind ASP.NET controls(two way) to a
| | > | > typed-dataset
| | > | > | Date: Tue, 8 Nov 2005 06:18:08 -0800
| | > | > | Lines: 29
| | > | > | Message-ID: <
[email protected]>
| | > | > | MIME-Version: 1.0
| | > | > | Content-Type: text/plain;
| | > | > | charset="Utf-8"
| | > | > | Content-Transfer-Encoding: 8bit
| | > | > | X-Newsreader: Microsoft CDO for Windows 2000
| | > | > | Content-Class: urn:content-classes:message
| | > | > | Importance: normal
| | > | > | Priority: normal
| | > | > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.0
| | > | > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols
| | > | > | NNTP-Posting-Host: TK2MSFTNGXA03.phx.gbl 10.40.2.250
| | > | > | Path: TK2MSFTNGXA01.phx.gbl!TK2MSFTNGXA03.phx.gbl
| | > | > | Xref: TK2MSFTNGXA01.phx.gbl
| | > | > microsoft.public.dotnet.framework.aspnet.webcontrols:11764
| | > | > | X-Tomcat-NG:
microsoft.public.dotnet.framework.aspnet.webcontrols
| | > | > |
| | > | > | In VS.NET 2005 there's no way to bind (two-way) ASP.NET
controls
| to a
| | > | > | typed-dataset. All binding is done against the new DataSource
| | > controls.
| | > | > I’ve
| | > | > | got a tree tier architecture where data is transported through
| the
| | > tiers
| | > | > by
| | > | > | typed-datasets. So typically my business objects have a read
| function
| | > | > witch
| | > | > | returns a typed-dataset and also have save function which
persist
| the
| | > | > | typed-dataset that is provided as a parameter.
| | > | > |
| | > | > | My problem is that I'm not able to bind the typed-dataset to
the
| | > | > controls.
| | > | > | When using a ObjectDataSource the methods that you need to
| configure
| | > for
| | > | > | select, update, insert and delete operations aren't what I
want.
| I
| | > want
| | > | > the
| | > | > | grid to work on my dataset, and then when I decide it, I want
to
| | > persist
| | > | > the
| | > | > | dataset in the database. I can have one dataset with several
data
| | > tables
| | > | > that
| | > | > | is loaded in multiple forms, and I want to save it in the last
| step.
| | > I
| | > | > don't
| | > | > | see how I can wire that in the editors.
| | > | > |
| | > | > | I ended up writing my own typed-dataset DataSourceControl which
| | > | > communicates
| | > | > | with my businessobject and calls a configurable read function
for
| | > | > selecting
| | > | > | the data. The typed-dataset is stored in session state so
changes
| can
| | > be
| | > | > made
| | > | > | to the same dataset between several postbacks from the client.
| | > Insert,
| | > | > | updates and deletes are all stored in the dataset. If the user
is
| | > | > satisfied
| | > | > | with all the changes he can save them. The dataset is then
passed
| to
| | > the
| | > | > | business object again to persist it in the datastore.
| | > | > |
| | > | > | Could you provide me with information about a working sample of
a
| | > custom
| | > | > | written datasource control that manipulates a typed dataset and
| that
| | > | > supports
| | > | > | the designer features of the datacontrols?
| | > | > |
| | > | > | What is the best approach to solve this?
| | > | > |
| | > | > |
| | > | >
| | > | >
| | > |
| | >
| | >
| |
|
|
