Question

I’ve got a huge problem here. I’ve managed to add javascript to my server side, but the problem it is not deleting. It doesnt have produce any errors so I don’t know where to start:

Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
    If e.CommandName = "cmdDelete" Then
        Dim ID As Integer = Convert.ToInt32(e.CommandArgument)
    End If
End Sub
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
    If e.Row.RowType = DataControlRowType.DataRow Then
        Dim l As ImageButton = DirectCast(e.Row.FindControl("ImageDelete"), ImageButton)
        l.Attributes.Add("onclick", "javascript:return " & "confirm('Are you sure you want to delete this record " & DataBinder.Eval(e.Row.DataItem, "ID") & "')")
    End If
End Sub

Protected Sub GridView1_RowDeleting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewDeleteEventArgs) Handles GridView1.RowDeleting
    Dim ID As Integer = CInt(GridView1.DataKeys(e.RowIndex).Value)
    'dim ID as Integer
    con.Open()
    'gridview1.rows(e.rowindex).cells(0)
    Dim cmd As New SqlCommand("delete from  [tblUser] where [ID]=@ID", con)
    cmd.Parameters.AddWithValue("@ID", ID)
    cmd.ExecuteNonQuery()
    con.Close()
End Sub

Client side

      <asp:TemplateField HeaderText="Delete">
  <ItemTemplate>
      <asp:ImageButton ID="ImageDelete" ImageUrl="" runat="server" CommandName="cmdDelete" CommandArgument='<%# Eval("ID") %>'
    />
  </ItemTemplate>
  </asp:TemplateField>
  </Columns

Answer 1

You haven’t shown in your markup whether you’re adding ID as a datakey to the GridView.

<asp:GridView ID="GridView1" runat="server" DataKeyNames="ID" ...>

And I think you might have a problem with the way you’re retrieving the ID in the delete logic:

Dim ID As Integer = Convert.ToInt32(GridView1.DataKeys(e.RowIndex)("ID"))