DataSourceID of 'controlname' must be the ID of a control of type IDataSource.

When I use the following code, I get this error:

The DataSourceID of 'PSAnswersGridView' must be the ID of a control of type IDataSource. A control with ID 'Key_Trait_Analysis_ObjectDataSource' could not be found.

I am trying to define an objectdatasource in code-behind and bind it to a gridview:

Partial Class Admin_Stuff

Inherits System.Web.UI.Page

Protected Key_Trait_Analysis_ObjectDataSource As ObjectDataSource

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
...
Key_Trait_Analysis_ObjectDataSource = New ObjectDataSource
Key_Trait_Analysis_ObjectDataSource.ID = "Key_Trait_Analysis_ObjectDataSource"
Key_Trait_Analysis_ObjectDataSource.TypeName = "Key_Trait_Analysis"
Key_Trait_Analysis_ObjectDataSource.SelectMethod = "Analyse"
..parameter setup..
PSAnswersGridView.DataSourceID = "Key_Trait_Analysis_ObjectDataSource"

GRidView is declaratively defined in the aspx:
                <asp:GridView ID="PSAnswersGridView" runat="server" Caption="Career Success Analysis"
                    CaptionAlign="Top" CssClass="admin" >
                    <EmptyDataTemplate>
                        --Nothing found--
                    </EmptyDataTemplate>
                </asp:GridView>

BUT!

If I declaratively define the objectdatasource in the aspx page and just refer to it in the code instead, I get no error and it works.

Partial Class Admin_Stuff

Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
...
Key_Trait_Analysis_ObjectDataSource.TypeName = "Key_Trait_Analysis"
Key_Trait_Analysis_ObjectDataSource.SelectMethod = "Analyse"
..parameter setup..
PSAnswersGridView.DataSourceID = "Key_Trait_Analysis_ObjectDataSource"

In the aspx:

<asp:ObjectDataSource ID="Key_Trait_Analysis_ObjectDataSource" runat="server"></asp:ObjectDataSource>

Can anyone tell me why the former errors out and the latter works?

PhilM99

10/27/2006 6:09:06 PM

asp.net.presentation-controls

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The DataSourceID is used for connecting statically defined items at the aspx page level.  If you're dynamically creating the ObjectDataSource then just assign it to the DataSource property of your GridView.  You don't need the ID in that case, plus it doesn't appear to work.

stiletto

10/27/2006 6:38:59 PM

Thanks for that. Ok that clears it up. I could swear that I tried it both ways. In the documentation it say that one cannot use BOTH Datasource and DatasourceID.

So anyhow, I just tried it dynamically created with Datasource= and I do not get the error! I do however get other errors. (Control not added to page... so I add it to the page). (Cannot locate parameters... etc.) It seems the declarative approach is simpler so I'm going with that. But I really wanted to know why one worked and not the other. Thanks!

PhilM99

10/27/2006 7:25:02 PM

Thanks! It worked for me too.

shivendradev

4/27/2009 4:32:51 PM

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