<asp:GridView ID="blokk" runat="server" AutoGenerateColumns="False" Width="100%"  DataKeyNames="id"
                          onrowdeleting="gridView_RowDeleting"   >
                  

  <ItemTemplate>
             <asp:Button ID="ButtonDelete" runat="server" CommandName="Delete"  Text="Delete"  />
    </ItemTemplate>
    

 Protected Sub gridView_RowDeleting(ByVal sender As Object, ByVal e As GridViewDeleteEventArgs)
        Dim stor_id As String = blokk.DataKeys(e.RowIndex).Values("id").ToString()
        con.Open()
        Dim cmd As New SqlCommand("delete from ixtisasblok where id=" + stor_id, con)
        Dim result As Integer = cmd.ExecuteNonQuery()
        con.Close()
        If result = 1 Then

            lblmsg.BackColor = Color.Red
            lblmsg.ForeColor = Color.White
            lblmsg.Text = stor_id + "      Deleted successfully.......    "
            blokk.DataBind()
        End If
    End Sub