| 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=?=" <novus@community.nospam>
| 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: <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
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| 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?
|
|

"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=?=" <novus@community.nospam>
> | 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: <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
> | 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?
> |
> |
>
>

| 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: <4A0369B6-B645-4723-9B35-2C3211BDA***@microsoft.com>
| 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
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| Xref: TK2MSFTNGXA02.phx.gbl

| 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’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

| > 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=?=" <novus@community.nospam>
| > | 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: <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
| > | 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?
| > |
| > |
| >
| >
|

"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=?=" <novus@community.nospam>
> | References:  <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
> <nRJaaEO5FHA.3***@TK2MSFTNGXA02.phx.gbl>
> | 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: <4A0369B6-B645-4723-9B35-2C3211BDA***@microsoft.com>
> | 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: 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’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=?=" <novus@community.nospam>
> | > | 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: <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
> | > | 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?
> | > |
> | > |
> | >
> | >
> |
>
>

| 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
| Message-ID: <5B1D6C56-0D4E-4E43-AC48-6EB1DEA87***@microsoft.com>
| 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: TK2MSFTNGXA02.phx.gbl!TK2MSFTNGXA01.phx.gbl!TK2MSFTNGXA03.phx.gbl
| Xref: TK2MSFTNGXA02.phx.gbl

| 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

| > 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=?=" <novus@community.nospam>
| > | References:  <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
| > <nRJaaEO5FHA.3***@TK2MSFTNGXA02.phx.gbl>
| > | 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: <4A0369B6-B645-4723-9B35-2C3211BDA***@microsoft.com>
| > | 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: 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  isnÃ

| >  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=?=" <novus@community.nospam>
| > | > | 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: <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
| > | > | 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?
| > | > |
| > | > |
| > | >
| > | >
| > |
| >
| >
|

| 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
|

|
| #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=?=" <novus@community.nospam>
| | References:  <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
| <nRJaaEO5FHA.3***@TK2MSFTNGXA02.phx.gbl>
| <4A0369B6-B645-4723-9B35-2C3211BDA***@microsoft.com>
| <LaiGlYZ5FHA.3***@TK2MSFTNGXA02.phx.gbl>
| | 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
| | Message-ID: <5B1D6C56-0D4E-4E43-AC48-6EB1DEA87***@microsoft.com>
| | 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: TK2MSFTNGXA02.phx.gbl!TK2MSFTNGXA01.phx.gbl!TK2MSFTNGXA03.phx.gbl
| | 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=?=" <novus@community.nospam>
| | > | References:  <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
| | > <nRJaaEO5FHA.3***@TK2MSFTNGXA02.phx.gbl>
| | > | 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: <4A0369B6-B645-4723-9B35-2C3211BDA***@microsoft.com>
| | > | 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: 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?

| | >  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=?=" <novus@community.nospam>
| | > | > | 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: <B16DABEE-E0AA-49B7-9F51-782BBA993***@microsoft.com>
| | > | > | 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:

| | > | > |
| | > | > | 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?
| | > | > |
| | > | > |
| | > | >
| | > | >
| | > |
| | >
| | >
| |
|
|

"s.greg***@4castweb.com" wrote:

> Are there any decent resources on binding to strongly typed datasets or
> the best way to create wrappers for them?
>
> I too am attempting to persist dataset changes between page requests
> and so want to 'relieve' the ObjectDataSource control of the
> responsibility for retreiving the data from the database/web service.
>
> Even in the simple case of retreiving the data to bind I have a dilemma
> over which is return type for my wrapper's Select method:
>
> xxxDataTable - With the exception of the GridView, there doesn't seem
> to be an easy way to specify a sort for the internal dataview when
> bound by the ObjectDataSource to any other control!?
> DataView - you can perform your own sort and filter, but you are then
> unable to view the Fields in the designer.
> List(Of xxxRow) - Allows you to perform you're own sort and filter &
> view fields in the designer, but then seems to have problems with Null
> values in fields.
>
> Is there another way I'm missing here?
>
>