页面刷新后AccordionPane回到第一级菜单

Question

我用AccordionPane做了一个网站的菜单，虽然我加了UpdatePanel来防止刷新，但页面还是刷新？大家帮帮我解决哈这个问题吧。每次刷新后左边的导航菜单都回到第一级菜单那里，根本不能保持在原来的位置，我想了几种办法都不可以，该怎么办呢？我做Web开发不久，希望各位奉上代码！本人不胜感激！

Answer 1

可能控件没有包含在内,引起页面刷新了
或者没有添加项目中没有添加System.Web.Extensions.dll,System.Web.Extensions.Design.dll

Answer 2

20 <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
21 <asp:UpdatePanel ID="UpdatePanel1" runat="server">
22 <ContentTemplate>
23 <table align="center" bgcolor="#c0de98" border="0" cellpadding="0" cellspacing="1" width="99%">
24     <tr>
25         <th colspan="2">
26             Accordion演示</th>
27     </tr>
28     <tr>
29         <td colspan="2">
30         <ajaxToolkit:Accordion ID="Accordion1" runat="server"
31              ContentCssClass="content" 
32              HeaderCssClass="header" 
33              AutoSize="None" Width="300px" Height="150px"
34               OnItemCommand="Accordion1_ItemCommand">
35             <Panes>
36             <ajaxToolkit:AccordionPane ID="AccordionPane1"  runat="server" >
37             <Header>
38             <a href ="">历史类</a>
39             </Header>
40             <Content>
41             <asp:LinkButton ID="linkbtn1" runat="server" CommandName="link" CommandArgument="中国古代历史" >中国古代历史</asp:LinkButton><br />
42             <asp:LinkButton ID="LinkButton1" runat="server" CommandName="link" CommandArgument="世界历史">世界历史</asp:LinkButton><br />
43             <asp:LinkButton ID="LinkButton2" runat="server" CommandName="link" CommandArgument="中国近代历史">中国近代历史</asp:LinkButton><br />
44             <asp:LinkButton ID="LinkButton3" runat="server" CommandName="link" CommandArgument="英国历史">英国历史</asp:LinkButton><br />
45             </Content>
46             </ajaxToolkit:AccordionPane >
47              <ajaxToolkit:AccordionPane ID="AccordionPane2" ContentCssClass="" HeaderCssClass="" runat="server">
48             
49             <Header>
50             <a href ="">文学类</a>
51             </Header>
52             <Content>
53             <asp:LinkButton ID="LinkButton8" runat="server" CommandName="link" CommandArgument="杂文">杂文</asp:LinkButton><br />
54             <asp:LinkButton ID="LinkButton9" runat="server" CommandName="link" CommandArgument="议论文">议论文</asp:LinkButton><br />
55             <asp:LinkButton ID="LinkButton10" runat="server" CommandName="link" CommandArgument="散文">散文</asp:LinkButton><br />
56             <asp:LinkButton ID="LinkButton11" runat="server" CommandName="link" CommandArgument="诗歌">诗歌</asp:LinkButton><br />
57             </Content>
58             </ajaxToolkit:AccordionPane >
59                          <ajaxToolkit:AccordionPane ID="AccordionPane3" ContentCssClass="" HeaderCssClass="" runat="server">
60             <Header>
61             <a href ="">其他</a>
62             </Header>
63             <Content>
64              <asp:LinkButton ID="LinkButton12" runat="server" CommandName="link" CommandArgument="教育">教育</asp:LinkButton><br />
65             <asp:LinkButton ID="LinkButton13" runat="server" CommandName="link" CommandArgument="美术">美术</asp:LinkButton><br />
66             <asp:LinkButton ID="LinkButton14" runat="server" CommandName="link" CommandArgument="计算机">计算机</asp:LinkButton><br />
67             <asp:LinkButton ID="LinkButton15" runat="server" CommandName="link" CommandArgument="儿童">儿童</asp:LinkButton><br />
68             </Content>
69             </ajaxToolkit:AccordionPane >
70             </Panes>
71             </ajaxToolkit:Accordion>
72         </td>
73     </tr> 
74     <tr>
75         <td style="width: 80px" >你选择的是：</td>
76         <td ><asp:Label ID="Label1" runat="server"  Width="300px"></asp:Label></td>  
77     </tr>  
78 </table>
79 </ContentTemplate>
80 </asp:UpdatePanel>