gridview自動生成序號

         protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowIndex != -1)
            {
                int id = GridView1.PageIndex * GridView1.PageSize + e.Row.RowIndex + 1;
                e.Row.Cells[0].Text = id.ToString();
            }
        }