Strange behavior with gridview and selectedindex

27 Jan 2006 5:09 PM

jordo

Hello there,
I have an asp.net 2.0 web app that uses gridview and formview. When a user
selects an item in the gridview the formview appears to show the detail.
This works quite well. However, I'd also like the formview to be displayed
if a specific datakey for an item in the gridview is passed through the
querystring.

I have the following code in place on the page_load event to handle this:
If Not
String.IsNullOrEmpty(Request.QueryString("funding_request_id")) Then
sqlPACE.SelectCommand =
sqlPACE.SelectCommand.Insert(sqlPACE.SelectCommand.IndexOf("ORDER BY"), "
WHERE funding_request_id=" & Request.QueryString("funding_request_id") & " ")

gvFRequests.SelectedIndex = 0
'Threading.Thread.Sleep(10000)
Dim orig As New WebControls.CommandEventArgs("Select",
gvFRequests.SelectedIndex)
Dim args As New
WebControls.GridViewCommandEventArgs(gvFRequests, orig)
gvFRequests_RowCommand(gvFRequests, args)

End If

When I run this, the gridview correctly shows just the one row selected, but
doesn't display the formview. HOWEVER, if I place a breakpoint in the
page_load event, the formview appears after I continue the execution! Remove
the breakpoint and the formview will not be displayed. As you can see, I
tried "sleeping" the thread to see if that would do it, but it doesn't work.
Any ideas?

27 Jan 2006 5:22 PM

Phillip Williams

If the declarative syntax for the datasource object contains a
ControlParameter to access the selectedvalue of the GridView, e.g.
<SelectParameters>
       <asp:ControlParameter ControlID="ChildGridView1" Name="OrderId"
                   PropertyName="SelectedDataKey.Values[0]"
                   Type="Int32" />
</SelectParameters>

Then it would override the code that you just did upon re-databinding.

You might try in the codebehind to remove that ControlParameter and add a
new one of type QueryStringParameter http://msdn2.microsoft.com/en-us/library/system.web.ui.webcontrols.querystringparameter.aspx

Then call again the Select method of the datasource object.

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

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"jordo" wrote:

> Hello there,
> I have an asp.net 2.0 web app that uses gridview and formview. When a user
> selects an item in the gridview the formview appears to show the detail.
> This works quite well. However, I'd also like the formview to be displayed
> if a specific datakey for an item in the gridview is passed through the
> querystring.
>
> I have the following code in place on the page_load event to handle this:
> If Not
> String.IsNullOrEmpty(Request.QueryString("funding_request_id")) Then
> sqlPACE.SelectCommand =
> sqlPACE.SelectCommand.Insert(sqlPACE.SelectCommand.IndexOf("ORDER BY"), "
> WHERE funding_request_id=" & Request.QueryString("funding_request_id") & " ")
>
> gvFRequests.SelectedIndex = 0
> 'Threading.Thread.Sleep(10000)
> Dim orig As New WebControls.CommandEventArgs("Select",
> gvFRequests.SelectedIndex)
> Dim args As New
> WebControls.GridViewCommandEventArgs(gvFRequests, orig)
> gvFRequests_RowCommand(gvFRequests, args)
>
> End If
>
> When I run this, the gridview correctly shows just the one row selected, but
> doesn't display the formview. HOWEVER, if I place a breakpoint in the
> page_load event, the formview appears after I continue the execution! Remove
> the breakpoint and the formview will not be displayed. As you can see, I
> tried "sleeping" the thread to see if that would do it, but it doesn't work.
> Any ideas?

27 Jan 2006 6:40 PM

jordo

Thank you,
This is working quite nicely.