关于treeview控件的问题

我试着编写了一个treeview控键的程序<%@ page language="vb"%>
<%@ import namespace="Microsoft.Web.UI.Webcontrols"%>
<%@ register tagrefix="mytree" namespace="Microsoft.Web.UI.Webcontrols"
assembly="Microsoft.Web.UI.Webcontrols"%>
<html>
<script language="vb" runat="server">
sub oncollapse(sender as object,e as treeviewclickeventargs)
mylabel.text+="<br>collapsed (node index=" &e.node.tostring()+")"
end sub 
sub onexpand(sender as object,e as treeviewclickeventargs)
mylabel.text+="<br>expand (node index=" &e.node.tostring()+")"
end sub 
sub  (sender as object,e as treeviewclickeventargs)
mylabel.text+="<br>selectd" &e.newnode.tostring() &"(oldnode index"+e.oldnode.tostring+")"
end sub
</script>
<head>
</head>
<body>
<form runat="server">
<mytree:treeview runat="server autopostback="true" oncollapse="oncollapse" onexpand="onexpand" onselectedindexchanged="onselectedindexchanged">
<mytree:treenode text="Asia">
<mytree:treenode text="China"/>
<mytree:treenode text="India"/>
</mytree:treenode>
<mytree:treenode text="Africa">
<mytree:treenode text="Zaire"/>
<mytree:treenode text="Zambia"/>
</mytree:treenode>
<mytree:treenode text="Amercia">
<mytree:treenode text="Canada"/>
<mytree:treenode text="USA"/>
</mytree:treenode>
</mytree:treeview>
<br>
<asp:label id="mylabel" runat="server" > event log: </asp:label></form>
</body>
</html>出现了如下错误
“/”应用程序中的服务器错误。
--------------------------------------------------------------------------------分析器错误 
说明: 在分析向此请求提供服务所需资源时出错。请检查下列特定分析错误详细信息并适当地修改源文件。 分析器错误信息: 找不到文件或程序集名称“Microsoft.Web.UI.Webcontrols”，或找不到它的一个依赖项。源错误: 
行 1：  <%@ page language="vb"%>
行 2：  <%@ import namespace="Microsoft.Web.UI.Webcontrols"%>
行 3：  <%@ register tagrefix="mytree" namespace="Microsoft.Web.UI.Webcontrols"
行 4：  assembly="Microsoft.Web.UI.Webcontrols"%>
行 5：  <html>
 源文件: c:\inetpub\wwwroot\zjj.aspx    行: 3 程序集加载跟踪: 下列信息有助于确定程序集“Microsoft.Web.UI.Webcontrols”无法加载的原因。
=== Pre-bind state information ===
LOG: DisplayName = Microsoft.Web.UI.Webcontrols
 (Partial)
LOG: Appbase = file:///c:/inetpub/wwwroot
LOG: Initial PrivatePath = bin
Calling assembly : (Unknown).
===LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Post-policy reference: Microsoft.Web.UI.Webcontrols
LOG: Attempting download of new URL file:///C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/root/2135a508/8d69a834/Microsoft.Web.UI.Webcontrols.DLL.
LOG: Attempting download of new URL file:///C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/root/2135a508/8d69a834/Microsoft.Web.UI.Webcontrols/Microsoft.Web.UI.Webcontrols.DLL.
LOG: Attempting download of new URL file:///c:/inetpub/wwwroot/bin/Microsoft.Web.UI.Webcontrols.DLL.
LOG: Attempting download of new URL file:///c:/inetpub/wwwroot/bin/Microsoft.Web.UI.Webcontrols/Microsoft.Web.UI.Webcontrols.DLL.
LOG: Attempting download of new URL file:///C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/root/2135a508/8d69a834/Microsoft.Web.UI.Webcontrols.EXE.
LOG: Attempting download of new URL file:///C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/Temporary ASP.NET Files/root/2135a508/8d69a834/Microsoft.Web.UI.Webcontrols/Microsoft.Web.UI.Webcontrols.EXE.
LOG: Attempting download of new URL file:///c:/inetpub/wwwroot/bin/Microsoft.Web.UI.Webcontrols.EXE.
LOG: Attempting download of new URL file:///c:/inetpub/wwwroot/bin/Microsoft.Web.UI.Webcontrols/Microsoft.Web.UI.Webcontrols.EXE.请问是什么意思，如何解决

解决方案 »

  1.   

    <%@ register tagrefix="mytree" namespace="Microsoft.Web.UI.Webcontrols"
    assembly="Microsoft.Web.UI.Webcontrols"%>
    <%@ Register TagPrefix="iewc" Namespace="Microsoft.Web.UI.WebControls" Assembly="Microsoft.Web.UI.WebControls, Version=1.0.2.226, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
      

  2.   

    using Microsoft.Web.UI.WebControls;
      

  3.   

    <%@ Register TagPrefix="iewc" Namespace="Microsoft.Web.UI.WebControls" Assembly="Microsoft.Web.UI.WebControls, Version=1.0.2.226, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>还是不能用
      

  4.   

    using Microsoft.Web.UI.WebControls;怎么加载？
    说具体点
      

  5.   

    你安装这个treeview控键过程是什么?
    你把它发出来
    我看看
    我想可能是安装的时候有问题!
      

  6.   

    将 Microsoft.Web.UI.Webcontrols Dll文件Copy到应用程序的Bin 目录中
    然后重新添加一遍,
      

  7.   

    http://www.microsoft.com/china/msdn/archives/library/dnaspp/html/aspnet-usingtreeviewiewebcontrol.asp
    http://search.csdn.net/Expert/topic/1525/1525202.xml?temp=.9699365