Hi Elmo,

ButtonField automatically puts the index to CommandArgument property of the
button. Now, because you changed it to TemplateField you are responsible for
binding the value manually yourself:

<asp:GridView runat="server" ID="MyGrid" AutoGenerateColumns="false">
               <Columns>
                   <asp:TemplateField>
                       <ItemTemplate>
                           <asp:Button runat="server" ID="btn"
CommandName="MyCustomCommand"
                               CommandArgument='<%# Container.DataItemIndex
%>' Text="Click Me" />
                       </ItemTemplate>
                   </asp:TemplateField>
               </Columns>
           </asp:GridView>

And the vb.net code behind:

Protected Sub MyGrid_RowCommand(ByVal sender As Object, _
    ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) _
    Handles MyGrid.RowCommand

    If e.CommandName = "MyCustomCommand" Then
        Dim index As Integer = Convert.ToInt32(e.CommandArgument)
        Dim row As GridViewRow = MyGrid.Rows(index)
    End If

End Sub

Hope it helps