I have a grid view will two different button columns. I want to perform a different action depending on what button the user presses. How in the SelectedIndexChanged event do I determine what colmun was pressed. This is the code I use to generate the columns.

            grdAttachments.Columns.Clear();
            ButtonField bfSelect = new ButtonField();
            bfSelect.HeaderText = "View";
            bfSelect.ButtonType = ButtonType.Link;
            bfSelect.CommandName = "Select";
            bfSelect.Text = "View";

            ButtonField bfLink = new ButtonField();
            bfLink.HeaderText = "Link/Unlink";
            bfLink.ButtonType = ButtonType.Link;
            bfLink.CommandName = "Select";
            bfLink.Text = "Link";

            grdAttachments.Columns.Add(bfSelect);
            grdAttachments.Columns.Add(bfLink);