GridView简单合并列

 if (e.Row.RowType == DataControlRowType.Footer)//判断此行是否是页尾，如果是则开始统计数据
        {
            e.Row.Cells[6].Text = "总计";
            e.Row.Cells[7].Text = ReturnTotal(7).ToString();
            e.Row.Cells[0].Text = "金额合计（大写）：" + ConvertSum(e.Row.Cells[7].Text);
            e.Row.Cells[0].ColumnSpan = 6;//ColumnSpan 属性指跨的列数
            for (int i = 1; i < 6; i++)
            {
                e.Row.Cells[i].Visible = false;   //设为隐藏
            }
        }