合并GridView中某列相同信息的行(轉載)

        /**//// <summary>
        /// 合并GridView中某列相同信息的行（单元格） 
        /// </summary>
        /// <param name="GridView1">GridView</param>
        /// <param name="cellNum">第几列</param>
        private static void GroupRows(GridView GridView1, int cellNum)
        {
         int i = 0, rowSpanNum = 1;
         while (i < GridView1.Rows.Count - 1)
         {
             GridViewRow gvr = GridView1.Rows[i];

             for (++i; i < GridView1.Rows.Count; i++)
             {
                 GridViewRow gvrNext = GridView1.Rows[i];
                 if (gvr.Cells[cellNum].Text == gvrNext.Cells[cellNum].Text)
                 {
                     gvrNext.Cells[cellNum].Visible = false;
                     rowSpanNum++;
                 }
                 else
                 {
                     gvr.Cells[cellNum].RowSpan = rowSpanNum;
                     rowSpanNum = 1;
                     break;
                 }
                 
                 if (i == GridView1.Rows.Count - 1)
                 {
                 gvr.Cells[cellNum].RowSpan = rowSpanNum;
                 }
             }
         }
        }