GridView合并单元格

/// <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>

    public 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;
                }
            }
        }
    }

    ///   <summary>  
    ///   根据条件列合并GridView列中相同的行  
    ///   </summary>  
    ///   <param   name="GridView1">GridView对象</param>  
    ///   <param   name="cellNum">需要合并的列</param>
    ///   ///   <param   name="cellNum2">条件列(根据某条件列还合并)</param>
    public static void GroupRows(GridView GridView1, int cellNum, int cellNum2)
    {

      

        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 + gvr.Cells[cellNum2].Text == gvrNext.Cells[cellNum].Text + gvrNext.Cells[cellNum2].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;

                  
                }
            }
        }
    }