GridView插入自定义复杂表头

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" BorderWidth="1" Width="100%" BorderColor="#93BEE2" BorderStyle="Solid" CellPadding="0" Font-Size="12px" ForeColor="Black" PageIndex="0" AllowPaging=true PageSize="15" OnPageIndexChanging="GridView1_PageIndexChanging" OnRowCreated="GridView1_RowCreated">
   <Columns>
       <asp:BoundField HeaderText="全宗号" DataField="WholeID" />
       <asp:BoundField HeaderText="全宗名称" DataField="WholeName" />
       <asp:BoundField HeaderText="目录启止号" DataField="MenuStartEndID" />
       <asp:BoundField HeaderText="启止年代" DataField="StartEndDatetime" />
       <asp:BoundField HeaderText="合计档案" DataField="ThisTotal" />
       <asp:BoundField HeaderText="永久档案" DataField="ThisForever" />
       <asp:BoundField HeaderText="长期档案" DataField="ThisLong" />
       <asp:BoundField HeaderText="短期档案" DataField="ThisShort" />
       <asp:BoundField HeaderText="存放位置" DataField="SavePlace" />
       <%--<asp:BoundField HeaderText="档案信息存储数字化情况" DataField="AsNumber" />--%>
       <asp:TemplateField HeaderText="档案信息存储数字化情况">
                        <ItemTemplate>
                            <%# (DataBinder.Eval(Container.DataItem, "AsNumber").ToString().Length > 10) ? DataBinder.Eval(Container.DataItem, "AsNumber").ToString().Substring(0, 10) + "..." : DataBinder.Eval(Container.DataItem, "AsNumber").ToString()%>
                        </ItemTemplate>
        </asp:TemplateField>
       <%--<asp:BoundField HeaderText="备注" DataField="Remark" />--%>
             <asp:TemplateField HeaderText="备注">
                        <ItemTemplate>
                            <%# (DataBinder.Eval(Container.DataItem, "Remark").ToString().Length > 10) ? DataBinder.Eval(Container.DataItem, "Remark").ToString().Substring(0, 10) + "..." : DataBinder.Eval(Container.DataItem, "Remark").ToString()%>
                        </ItemTemplate>
        </asp:TemplateField>
       <asp:TemplateField HeaderText="操作">
           <ItemTemplate>
           <div style="text-align:center">
               <a href="CartularyWholeStatisticEdit.aspx?CartularyWholeStatisticID=<%# DataBinder.Eval(Container, "DataItem.CartularyWholeStatisticID")%>&PageIndex=<%=PageIndex%>">编辑</a>&nbsp;<a οnclick="return delconfirm()" href="CartularyWholeStatisticDele.aspx?CartularyWholeStatisticID=<%# DataBinder.Eval(Container, "DataItem.CartularyWholeStatisticID")%>&PageIndex=<%=PageIndex%>">删除</a>
           </div>
           </ItemTemplate>
           <ItemStyle Width="100px" />
       </asp:TemplateField>
   </Columns>
   <HeaderStyle BackColor="#337FB2" Font-Bold="False" Font-Size="12px" ForeColor="White" Height="22px" />
   <RowStyle Height="22px" Font-Size="12px" HorizontalAlign=Center />
   <AlternatingRowStyle Height="22px" BackColor="#E8F4FF" />
   <PagerStyle HorizontalAlign="Right" />
</asp:GridView>

     protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
    {
        DataControlRowType elemType = e.Row.RowType;
        if (e.Row.RowType == DataControlRowType.Header)
        {
            GridViewRow dgi = new GridViewRow(0, -1, DataControlRowType.Header, DataControlRowState.Normal);
            GridViewRow dgi1 = new GridViewRow(0, -1, DataControlRowType.Header, DataControlRowState.Normal);
            Table tb = new Table();
            tb = (Table)GridView1.Controls[0];
            tb.Rows.Clear();
            tb.Rows.AddAt(0, dgi);
            tb.Rows.AddAt(1, dgi1);
            TableCell tc11 = new TableCell();
            TableCell tc12 = new TableCell();
            TableCell tc13 = new TableCell();
            TableCell tc14 = new TableCell();
            TableCell tc15 = new TableCell();
            TableCell tc16 = new TableCell();
            TableCell tc17 = new TableCell();
            TableCell tc18 = new TableCell();
            TableCell tc19 = new TableCell();

            TableCell tc20 = new TableCell();
            TableCell tc21 = new TableCell();
            TableCell tc22 = new TableCell();
            TableCell tc23 = new TableCell();

            tc11.Text = "全宗号";
            tc11.RowSpan = 2;
            tc11.Height = 44;
            tc11.Font.Bold = true;
            tc11.HorizontalAlign = HorizontalAlign.Center;  /*tc11.RowSpan = 2;*/
            dgi.Cells.Add(tc11);
            tc12.Text = "全宗名称";
            tc12.Font.Bold = true;
            tc12.HorizontalAlign = HorizontalAlign.Center;
            tc12.RowSpan = 2;
            dgi.Cells.Add(tc12);
            tc13.Text = "目录启止号";
            tc13.Font.Bold = true;
            tc13.HorizontalAlign = HorizontalAlign.Center;
            tc13.RowSpan = 2;
            dgi.Cells.Add(tc13);
            tc14.Text = "启止年代";
            tc14.Font.Bold = true;
            tc14.RowSpan = 2;
            tc14.HorizontalAlign = HorizontalAlign.Center;  /*tc11.RowSpan = 2;*/
            dgi.Cells.Add(tc14);
            tc15.Text = "档案数量(卷、件)";
            tc15.Font.Bold = true;
            tc15.HorizontalAlign = HorizontalAlign.Center;
            tc15.ColumnSpan = 4;
            dgi.Cells.Add(tc15);
            tc16.Text = "存放位置";
            tc16.Font.Bold = true;
            tc16.HorizontalAlign = HorizontalAlign.Center;
            tc16.RowSpan = 2;
            dgi.Cells.Add(tc16);
            tc17.Text = "档案信息存储数字化情况";
            tc17.Font.Bold = true;
            tc17.RowSpan = 2;
            tc17.HorizontalAlign = HorizontalAlign.Center;  /*tc11.RowSpan = 2;*/
            dgi.Cells.Add(tc17);
            tc18.Text = "备注";
            tc18.Font.Bold = true;
            tc18.HorizontalAlign = HorizontalAlign.Center;
            tc18.RowSpan = 2;
            dgi.Cells.Add(tc18);
            tc19.Text = "";
            tc19.HorizontalAlign = HorizontalAlign.Center;
            tc19.RowSpan = 2;
            dgi.Cells.Add(tc19);

            tc20.Text = "合计";
            tc20.Font.Bold = true;
            tc20.HorizontalAlign = HorizontalAlign.Center;
            dgi1.Cells.Add(tc20);
            tc21.Text = "永久";
            tc21.Font.Bold = true;
            tc21.HorizontalAlign = HorizontalAlign.Center;
            dgi1.Cells.Add(tc21);
            tc22.Text = "长期";
            tc22.Font.Bold = true;
            tc22.HorizontalAlign = HorizontalAlign.Center;
            dgi1.Cells.Add(tc22);
            tc23.Text = "短期";
            tc23.Font.Bold = true;
            tc23.HorizontalAlign = HorizontalAlign.Center;
            dgi1.Cells.Add(tc23);

            int nColumn = e.Row.Cells.Count;
            for (int i = 0; i < nColumn; i++)
            {
                e.Row.Cells.RemoveAt(0);
            }
        }

        if (e.Row.RowType == DataControlRowType.Footer)
        {
            GridViewRow dgi2 = new GridViewRow(0, -1, DataControlRowType.Header, DataControlRowState.Normal);
            Table tb = new Table();
            tb = (Table)GridView1.Controls[0];
            tb.Rows.AddAt(Convert.ToInt32(GridView1.Rows.Count) + 3, dgi2);
            TableCell tc11 = new TableCell();
            TableCell tc12 = new TableCell();
            TableCell tc13 = new TableCell();
            TableCell tc14 = new TableCell();
            TableCell tc15 = new TableCell();
            TableCell tc16 = new TableCell();
            TableCell tc17 = new TableCell();
            TableCell tc18 = new TableCell();
            TableCell tc19 = new TableCell();
            TableCell tc110 = new TableCell();
            TableCell tc111 = new TableCell();

            //计算合计
            decimal ThisTotal, ThisForever, ThisLong, ThisShort;
            ThisTotal = 0; ThisForever = 0; ThisLong = 0; ThisShort = 0;
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                string temp1 = GridView1.Rows[i].Cells[4].Text.ToString();
                if (temp1 == "") temp1 = "0";
                ThisTotal += Convert.ToDecimal(temp1);

                string temp2 = GridView1.Rows[i].Cells[5].Text.ToString();
                if (temp2 == "") temp2 = "0";
                ThisForever += Convert.ToDecimal(temp2);

                string temp3 = GridView1.Rows[i].Cells[6].Text.ToString();
                if (temp3 == "") temp3 = "0";
                ThisLong += Convert.ToDecimal(temp3);

                string temp4 = GridView1.Rows[i].Cells[7].Text.ToString();
                if (temp4 == "") temp4 = "0";
                ThisShort += Convert.ToDecimal(temp4);
            }

            tc11.Text = "合计";
            //tc11.Font.Bold = true;
            tc11.ForeColor = Color.Black;
            tc11.BackColor = Color.White;
            tc11.HorizontalAlign = HorizontalAlign.Center;
            tc11.Height = 22;
            dgi2.Cells.Add(tc11);

            tc12.Text = "";
            tc12.ForeColor = Color.Black;
            tc12.BackColor = Color.White;
            tc12.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc12);

            tc13.Text = "";
            tc13.ForeColor = Color.Black;
            tc13.BackColor = Color.White;
            tc13.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc13);

            tc14.Text = "";
            tc14.ForeColor = Color.Black;
            tc14.BackColor = Color.White;
            tc14.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc14);

            tc15.ForeColor = Color.Black;
            tc15.BackColor = Color.White;
            tc15.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc15);
            tc15.Text = ThisTotal.ToString();

            tc16.ForeColor = Color.Black;
            tc16.BackColor = Color.White;
            tc16.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc16);
            tc16.Text = ThisForever.ToString();

            tc17.ForeColor = Color.Black;
            tc17.BackColor = Color.White;
            tc17.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc17);
            tc17.Text = ThisLong.ToString();

            tc18.ForeColor = Color.Black;
            tc18.BackColor = Color.White;
            tc18.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc18);

            tc19.Text = "";
            tc19.ForeColor = Color.Black;
            tc19.BackColor = Color.White;
            tc19.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc19);
            tc18.Text = ThisShort.ToString();

            tc110.Text = "";
            tc110.ForeColor = Color.Black;
            tc110.BackColor = Color.White;
            tc110.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc110);

            tc111.Text = "";
            tc111.ForeColor = Color.Black;
            tc111.BackColor = Color.White;
            tc111.HorizontalAlign = HorizontalAlign.Center;
            dgi2.Cells.Add(tc111);

            int nColumn = e.Row.Cells.Count;
            for (int i = 0; i < nColumn; i++)
            {
                e.Row.Cells.RemoveAt(0);
            }
        }
    }