GridView中的单元格合并

 /// <summary>
    /// GridView中的单元格合并
    /// </summary>
    /// <param name="gv"></param>
    /// <param name="cellNum">第几列</param>
    public static void GroupRows(GridView gv, int cellNum)
    {
        int i = 0, rowSpanNum = 1;
        int j = 0;
        string[] _color = { "#eeeeff", "#ffffff" };
        while (i < gv.Rows.Count - 1)
        {
            GridViewRow gvr = gv.Rows[i];
            gvr.Attributes["bgcolor"] = _color[j % 2];
            for (++i; i < gv.Rows.Count; i++)
            {
                GridViewRow gvrNext = gv.Rows[i];
                if (gvr.Cells[cellNum].Text == gvrNext.Cells[cellNum].Text)
                {
                    gvrNext.Attributes["bgcolor"] = _color[j % 2];
                    //gvrNext.Cells[cellNum].Visible = false;
                    gvrNext.Cells[cellNum].Visible = false;
                    rowSpanNum++;
                }
                else
                {
                    gvr.Cells[cellNum].RowSpan = rowSpanNum;
                    rowSpanNum = 1;
                    j++;
                    break;