Accordion动态添加AccordionPane

<%@ Control Language="C#" AutoEventWireup="true" Codebehind="Menu.ascx.cs" Inherits="Web.Controls.Menu" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<div style=" 100%; text-align: left;">
    <ajaxToolkit:Accordion ID="MyAccordion" runat="Server" SelectedIndex="0" HeaderCssClass="accordionHeader"
        HeaderSelectedCssClass="accordionHeaderSelected" ContentCssClass="accordionContent"
        AutoSize="None" FadeTransitions="true" TransitionDuration="250" FramesPerSecond="40"
        RequireOpenedPane="false" SuppressHeaderPostbacks="true">
        <Panes>
        </Panes>
        <HeaderTemplate>
            <div style=" 150px; height: 35px; color: White; background-image: url('<%=ResolveClientUrl("~/Images") %>/Slice1.png');">
                <div style="padding-top: 10px; padding-left:10px; font-weight:bold; font-size:12px;">
                    <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
                </div>
            </div>
        </HeaderTemplate>
        <ContentTemplate>
            <div style=" 150px; height: auto; line-height: 25px; background-color: #748CCF;
                text-align: left;">
                <div style="margin-left: 20px; color: White;">
                    <asp:PlaceHolder ID="PlaceHolder2" runat="server"></asp:PlaceHolder>
                </div>
            </div>
        </ContentTemplate>
    </ajaxToolkit:Accordion>
    <asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" />
</div>

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

namespace Web.Controls
{
    public partial class Menu : System.Web.UI.UserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
                CreatMenu();
        }

        void CreatMenu()
        {
            int count = 1;
            foreach (SiteMapNode group in SiteMap.RootNode.ChildNodes)
            {

                AjaxControlToolkit.AccordionPane ap = new AjaxControlToolkit.AccordionPane();
                ap.Header = MyAccordion.HeaderTemplate;
                ap.Content = MyAccordion.ContentTemplate;
                HyperLink hl = new HyperLink();
                hl.Text = group.Title;
                hl.Target = group.Url;
                foreach (Control c in ap.HeaderContainer.Controls)
                {
                    if (c.GetType().Name == "PlaceHolder")
                    {
                        c.Controls.Add(hl);
                        break;
                    }
                }

                foreach (SiteMapNode child in group.ChildNodes)
                {
                    HyperLink hl2 = new HyperLink();
                    hl2.Text = child.Title;
                    hl2.Target = child.Url;
                    foreach (Control c in ap.ContentContainer.Controls)
                    {
                        if (c.GetType().Name == "PlaceHolder")
                        {
                            c.Controls.Add(hl2);
                            break;
                        }
                    }
                }
                count++;
                MyAccordion.Panes.Add(ap);
            }
        }
    }
}