GridView Footer页脚统计实现多行

在使用GridView时有时会需要多行显示页脚Footer的统计，下面是一种解决方法，仅仅供各位参考

在GridView的RowCreated事件中添加多行页脚，实例代码如下：

         protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
         {
             if(e.Row.RowType == GridViewRowType.Footer)
             {
                 Tuple<int, int> sum = IndexStatisticsDal.GetRecordSum(Convert.ToDateTime(ViewState["StartDate"]), Convert.ToDateTime(ViewState["EndDate"]), StatisticTypeEnum.REENTRYICU);
                 string resultStr = "&frasl;";
                 if (sum.Item2 > )
                 {
                     resultStr = ((double)sum.Item1 / sum.Item2 * ).ToString("0.0000") + "‰";
                 }
                 TableCellCollection footerRow = e.Row.Cells;
                 footerRow.Clear();
                 footerRow.Add(new TableCell());
                 footerRow[].Text = "合计";
                 footerRow[].Attributes.Add("rowspan", "");
                 footerRow.Add(new TableCell());
                 footerRow[].Text = sum.Item1.ToString();
                 footerRow.Add(new TableCell());
                 footerRow[].Text = sum.Item2.ToString() + "</th></tr><tr class=\"C1FooterRow\" style=\"font-size: 14px; font-weight: bold;\">";
                 footerRow.Add(new TableCell());
                 footerRow[].Text = "非预期重返重症医学科率";
                 footerRow.Add(new TableCell());
                 footerRow[].Text = resultStr;
             }
         }