合并GridView中某列相同信息的行（单元格）

解决方法如下（写在公共模块里，定义为静态方法方便调用）：
 1 /// <summary>
 2 /// 合并GridView中某列相同信息的行（单元格） 
 3 /// </summary>
 4 /// <param name="GridView1">GridView</param>
 5 /// <param name="cellNum">第几列</param>
 6 public static void GroupRows(GridView GridView1, int cellNum)
 7 {
 8     int i = 0, rowSpanNum = 1;
 9     while (i < GridView1.Rows.Count - 1)
 10     {
 11         GridViewRow gvr = GridView1.Rows[i];
 12
 13         for (++i; i < GridView1.Rows.Count; i++)
 14         {
 15             GridViewRow gvrNext = GridView1.Rows[i];
 16             if (gvr.Cells[cellNum].Text == gvrNext.Cells[cellNum].Text)
 17             {
 18                 gvrNext.Cells[cellNum].Visible = false;
 19                 rowSpanNum++;
 20             }
 21             else
 22             {
 23                 gvr.Cells[cellNum].RowSpan = rowSpanNum;
 24                 rowSpanNum = 1;
 25                 break;
 26             }
 27
 28             if (i == GridView1.Rows.Count - 1)
 29             {
 30                 gvr.Cells[cellNum].RowSpan = rowSpanNum;
 31             }
 32         }
 33     }
 34 }