如何让TreeView1.SelectedNode.Text的值通过url传递更新首页框架中间的页面

如何让TreeView1.SelectedNode.Text的值通过url传递更新首页框架中间的页面
首页
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <style type="text/css">
    table
    {
    border-style: dashed;
            border-width: 0px;
            padding: 0px;
            margin: 0px;
            width:100%;
          height:100%;
        }
    
    .header
    {
        width:100%;
        height:10%;
    }
.left
{
    width:20%;
    height:80%;
}
.right
{
    width:70%;
    height:80%;
}


    </style>
</head>
<body>
    <table cellpadding="0" cellspacing="0" border="0">
        <tr>
            <td colspan="2" class="header">
                                <iframe name="frmHeader" 
    src="header.aspx"  
    title="系统信息" width="100%" align="top" scrolling="no"  frameborder="0" 
    id="Iframe1"></iframe>
            </td>
        </tr>
        <tr  style="height:500px" valign="top">
            <td class="left">
                <iframe name="frmLeft" src="left.aspx"  title="功能区" width="100%" align="top" 
              scrolling="no"  frameborder="0" id="I1"  height="500px"></iframe>
            </td>
            <td class="right">
                <iframe name="frmRight" src="Default.aspx"  title="内容区" width="100%" align="top" scrolling="no" height="500px"  frameborder="0" id="frmLeft"></iframe>
            </td>
        </tr>
    </table>
</body>
</html>
左页面
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <style type="text/css">
    table
    {
    border-style: dashed;
            border-width: 0px;
            padding: 0px;
            margin: 0px;
            width:100%;
          height:100%;
        }
    
    .header
    {
        width:100%;
        height:10%;
    }
.left
{
    width:20%;
    height:80%;
}
.right
{
    width:70%;
    height:80%;
}


    </style>
</head>
<body>
    <table cellpadding="0" cellspacing="0" border="0">
        <tr>
            <td colspan="2" class="header">
                                <iframe name="frmHeader" 
    src="header.aspx"  
    title="系统信息" width="100%" align="top" scrolling="no"  frameborder="0" 
    id="Iframe1"></iframe>
            </td>
        </tr>
        <tr  style="height:500px" valign="top">
            <td class="left">
                <iframe name="frmLeft" src="left.aspx"  title="功能区" width="100%" align="top" 
              scrolling="no"  frameborder="0" id="I1"  height="500px"></iframe>
            </td>
            <td class="right">
                <iframe name="frmRight" src="Default.aspx"  title="内容区" width="100%" align="top" scrolling="no" height="500px"  frameborder="0" id="frmLeft"></iframe>
            </td>
        </tr>
    </table>
</body>
</html>
左页面.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;public partial class left : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
       
    }
    protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
    {
        //组装执行URL传参的URL字符串        string url = string.Format("Default.aspx?TreeView1.SelectedNode.Text={0}",
            this.TreeView1.SelectedNode.Text);        //使用带有URL参数的URL执行页面跳转
        this.Response.Redirect(url);
  站点地图
<?xml version="1.0" encoding="utf-8" ?>
<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >
  <siteMapNode url="" title="公安文件管理系统"  description="">
    <siteMapNode url="Login.aspx" title="登陆"  description="用户登陆、注销" />
    <siteMapNode url="" title="讲话类文件"  description="讲话类文件" >
      <siteMapNode url="" title="部局领导讲话"  description="部局领导讲话" />
      <siteMapNode url="" title="公安局领导讲话"  description="公安局领导讲话" />
      <siteMapNode url="" title="公安处领导讲话"  description="公安处领导讲话" />
    </siteMapNode>
    <siteMapNode url="" title="规范性文件类"  description="规范性文件类" >
      <siteMapNode url="" title="上级文件"  description="上级文件" />
      <siteMapNode url="" title="本处文件"  description="本处文件" />
    
    </siteMapNode>
    <siteMapNode url="" title="经验材料文件类"  description="经验材料文件类" >
      <siteMapNode url="" title="外局经验材料"  description="外局经验材料" />
      <siteMapNode url="" title="本处经验材料"  description="本处经验材料" />
     
    </siteMapNode>
    <siteMapNode url="" title="汇报材料文件类"  description="汇报材料文件类" >
      <siteMapNode url="" title="述职报告"  description="述职报告" />
      <siteMapNode url="" title="杂项汇报"  description="杂项汇报" />
    </siteMapNode>
  </siteMapNode>
</siteMap>