I am having a problem with losing data from my datagrid after it posts back.

The page runs the populate data sub at the end of CreateChildControls and
fills my DataGrid.  After I postback by clicking the cmdUpdate button, I
would expect oTable.Items.Count to have the same # it was before I did the
postback, but instead its zero.

Thanks for any help...

Below is some of the sample code:


    Protected WithEvents oTable As New System.Web.UI.WebControls.DataGrid
    Protected WithEvents cmdUpdate As New System.Web.UI.WebControls.LinkButton

   Protected Overrides Sub CreateChildControls()
            oTable.EnableViewState = True
            Me.Controls.Add(oTable)
            Me.Controls.Add(cmdUpdate)
   End Sub

  Private Sub cmdUpdate_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles cmdUpdate.Click
             sDebug = oTable.Items.Count
  End Sub

  Protected Overrides Sub RenderWebPart(ByVal output As
System.Web.UI.HtmlTextWriter)
            Me.EnsureChildControls()
            PopulateData()
            ......
  End Sub

Dan,

I suspect that the event cmdUpdate_Click is not getting fired. Please check
whether you have defined the event hanlder in the  CreateChildControls method
(where the defniton for the control lives)
Have you enabled postback for this control  ?

Could you please post me the code for CreateChildControls, i can have a look
at that/
The problem is definitely with the events not getting fired inside your
custom control.
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Mark, thanks for the reply, but I know that the event is definately being
fired as I am outputting the sDebug on the RenderControl:

here is more of the code:


    Protected WithEvents oTable As New System.Web.UI.WebControls.DataGrid
    Protected WithEvents lblPageXofY As New System.Web.UI.WebControls.Label
    Protected WithEvents lblCurPage As New System.Web.UI.WebControls.TextBox
    Protected WithEvents lblFilter As New System.Web.UI.WebControls.TextBox
    Protected WithEvents lblLastProvider As New
System.Web.UI.WebControls.TextBox
    Protected WithEvents cmdUpdate As New System.Web.UI.WebControls.LinkButton
    Protected WithEvents lblPrev As New System.Web.UI.WebControls.LinkButton
    Protected WithEvents lblNext As New System.Web.UI.WebControls.LinkButton
    Protected WithEvents dlAlpha As New System.Web.UI.WebControls.DataList


    Dim sDebug As String = ""

Protected Overrides Sub RenderWebPart(ByVal output As
System.Web.UI.HtmlTextWriter)
        Try
        cmdUpdate.RenderControl(output)
        output.Write("<BR>")
        oTable.RenderControl(output)
        If sDebug.Length > 0 Then
            output.Write("<BR><span style='color:blue'>" & sDebug &
"</SPAN><BR>")
        End If
End Sub

Protected Overrides Sub CreateChildControls()
        Try
            sDebug = sDebug & "CreateChildControls<BR>"
            AlphaList()
            lblPrev.Text = "Previous"
            lblNext.Text = "Next"
            lblPageXofY.Text = "Page X of Y"
            lblPrev.Font.Bold = True
            lblNext.Font.Bold = True
            dlAlpha.RepeatDirection = RepeatDirection.Horizontal
            dlAlpha.RepeatLayout = RepeatLayout.Flow
            cmdUpdate.Text = "Update"
            oTable.AutoGenerateColumns = False
            Me.Controls.Add(dlAlpha)
            Me.Controls.Add(lblPrev)
            Me.Controls.Add(lblNext)
            Me.Controls.Add(lblPageXofY)
            Me.Controls.Add(oTable)
            Me.Controls.Add(lblCurPage)
            Me.Controls.Add(lblFilter)
            Me.Controls.Add(lblLastProvider)
            Me.Controls.Add(cmdUpdate)
        Catch ex As Exception
        End Try
End Sub

Private Sub cmdUpdate_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles cmdUpdate.Click
        Try
            sDebug = sDebug & "UpdateClick<BR>"
        Catch ex As Exception

        End Try
End Sub

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