/// <summary>     /// 合并GridView中某列相同信息的行（单元格）     /// </summary>     /// <param name="GridView1"></param>     /// <param name="cellNum"></param>     public static void GroupCol(GridView GridView1, int cols)     {         if (GridView1.Rows.Count < 1 || cols > GridView1.Rows[0].Cells.Count - 1)         {             return;         }         TableCell oldTc = GridView1.Rows[0].Cells[cols];         for (int i = 1; i < GridView1.Rows.Count; i++)         {             TableCell tc = GridView1.Rows[i].Cells[cols];             if (oldTc.Text == tc.Text)             {                 tc.Visible = false;                 if (oldTc.RowSpan == 0)                 {                     oldTc.RowSpan = 1;                 }                 oldTc.RowSpan++;                 oldTc.VerticalAlign = VerticalAlign.Middle;             }             else             {                 oldTc = tc;             }         }     }