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Asp.Net: datagrid event is not fired

Posted on 2004-10-28
Medium Priority
Last Modified: 2010-05-18
Hello experts,
in my Asp.Net (vb.net) web application
I'm using in one web page the following definitions and code:
<asp:datagrid id="dgTest" style="Z-INDEX: 103; LEFT: 20px; POSITION: absolute; TOP: 442px"
      runat="server" Width="869px" Height="10px" Font-Size="10pt"
      AutoGenerateColumns="False" GridLines="Vertical" HeaderStyle-BackColor="Red" HeaderStyle-ForeColor="White"
      HeaderStyle-Font-Bold="True" HeaderStyle-Font-Name="Verdana" AlternatingItemStyle-BackColor="#dddddd"
      ItemStyle-Font-Name="Verdana" ShowFooter="True"

      <FooterStyle Font-Names="Verdana" Font-Bold="True" ForeColor="White" BackColor="Red"></FooterStyle>
      <AlternatingItemStyle BackColor="#DDDDDD"></AlternatingItemStyle>
      <ItemStyle Font-Names="Verdana"></ItemStyle>
      <HeaderStyle Font-Names="Verdana" Font-Bold="True" ForeColor="White" BackColor="Red"></HeaderStyle>

            <asp:ButtonColumn Text="Close" ButtonType="PushButton" HeaderText="Close"
            <asp:BoundColumn DataField="myKey" ReadOnly="True" HeaderText="Key">
                  <HeaderStyle HorizontalAlign="Center"></HeaderStyle>
                  <ItemStyle HorizontalAlign="Center" Width="15%"></ItemStyle>

    Private Sub dgTest_ItemCommand(ByVal source As Object, _
              ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs) Handles dgTest.ItemCommand
        Dim itemCell0 As TableCell = e.Item.Cells(0)    ' myKey
        If e.CommandName = "btnClose" Then
            'Me.txtBoxInfo.Text = "You clicked one of the 'Close' buttons!"
        End If
    End Sub

    Sub showTestDetails(ByVal sender As Object, ByVal e As DataGridCommandEventArgs)
        Dim itemCell0 As TableCell = e.Item.Cells(0)    ' myKey
        If e.CommandName = "btnClose" Then
            'Me.txtBoxInfo.Text = "You clicked one of the 'Close' buttons!"
        End If
    End Sub
Clicking the close button 'btnClose' none of the above's routines receives the control.
Why does this happen?
If anyone knows a solution please supply appropriate [snippet] information.

   Thank you very much!

Question by:HStrix
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LVL 28

Expert Comment

ID: 12431422
Hi HStrix,

first of all may be there is a conflict between the 2 subs
try to remove dgTest_ItemCommand and if there is a addhandler
second, are you binding the datagrid within if not ispostback then


Author Comment

ID: 12431503
Thank mmarinov,
- I changed dgTest_ItemCommand  to XXXdgTest_ItemCommand. => result: no change
- The datagrid is always filled in Page_Load using a subroutine.
LVL 28

Accepted Solution

mmarinov earned 2000 total points
ID: 12431547

if this subroutine is not calling like this

Sub Page_load
    If Not IsPostBack Then
        call the sub
    End If
End Sub

then you will not be able to get the command because when a post back occurs the asp.net modified the state of the datagrid and it does not know that a control was hitted

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Author Comment

ID: 12431553
The datagrid is filled as follows:

Dim objConn As New OleDbConnection
Dim objAdapter As New System.Data.OleDb.OleDbDataAdapter
Dim objDataset As New DataSet
Dim strSQL As String = "Select * From mytable;"
        objAdapter.SelectCommand = New System.Data.OleDb.OleDbCommand(strSQL, objConn)
        ' Fill the dataset.
        ' Create a new view.
        Dim objView As New DataView(objDataset.Tables(0))
        ' Set up the data grid and bind the data.
        dgTest.DataSource = objView

The datagrid is properly filled.

Author Comment

ID: 12431590
Thank you very much mmarinov,
that was exactly the problem.
It is now working.


LVL 28

Expert Comment

ID: 12431610

I'm glad that can help


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