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protected void grid_ItemCreated(object sender, DataGridItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Header)
        {
            e.Item.SetRenderMethodDelegate(new RenderMethod(NewRenderMethod));
        }
        else if (e.Item.ItemType == ListItemType.Footer)
        {
            e.Item.SetRenderMethodDelegate(new RenderMethod(FooterRenderMethod));
        }
    }

private void FooterRenderMethod(HtmlTextWriter writer, Control ctl)
    {
        writer.Write("<td style=\"color:#663333;\" align=center>");
        writer.Write("");
        writer.Write("</td>");
        writer.Write("</tr>");
        writer.Write("<tr style=\"background-color:#F0EDE4\">");
        writer.Write("<TD style=\"color:#663333;\" align=\"center\">总计</TD>\n");
        for (int i = 0; i < dtRole.Rows.Count; i++)
        {
            writer.Write("<td style=\"color:#663333;\" align=center>");
            writer.Write("");
            writer.Write("</td>");
            writer.Write("<td style=\"color:#663333;\" align=center>");
            writer.Write("");
            writer.Write("</td>");
            writer.Write("<td style=\"color:#663333;\" align=center>");
            writer.Write("");
            writer.Write("</td>");

        }
        writer.Write("<td style=\"color:#663333;\" align=center>");
        writer.Write("");
        writer.Write("</td>");
        writer.Write("</tr>");
    }

 private void NewRenderMethod(HtmlTextWriter writer, Control ctl)
    {
        writer.Write("<TD style=\"color:#663333;\" align=\"center\">价格区间</TD>\n");
        for (int i = 0; i < dtRole.Rows.Count; i++)
        {
            writer.Write("<td style=\"color:#663333;\" align=center colspan=3>");
            writer.Write(dtRole.Rows[i]["RoleName"]);
            writer.Write("</td>");
        }
        writer.Write("<TD style=\"color:#663333;\" align=\"center\">行总计</TD>\n");
        writer.Write("</tr>");
        for (int i = 0; i <= ctl.Controls.Count - 1; i++)
        {
            ctl.Controls[i].RenderControl(writer);
        }
    }