前台代码 注意 一定要加上Target="contentFrame"否则跳转的时候 跳不到内容框架Page Language="C#" AutoEventWireup="true" CodeFile="Left.aspx.cs" Inherits="Left" %>        
         
         
     
    
      
                
          
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后台代码using System;using System.Collections.Generic;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Configuration;using System.Data;using System.IO;using NetBuild.Common;using NetBuild.Models;using NetBuild.Bussiness;using System.Linq;public partial class Left : System.Web.UI.Page{    /// 
    ///     /// 
    ///     ///     protected void Page_Load(object sender, EventArgs e)    {        if (!IsPostBack)        {            TreeNode tmpNode;            lbLoginUser.Text = Session["LoginName"].ToString();            AddTreeNode(-1, (System.Web.UI.WebControls.TreeNode)null);        }                                }         public DataTable bind()    {        string str1 = "select * from Common_Menu  ";        DataSet myds = new DataSet();        myds = SQLHelper.GetDataSet(str1);        return myds.Tables[0];    }     protected void AddTreeNode(int ParentMenuID, System.Web.UI.WebControls.TreeNode pNode)     {         DataTable dt = bind();         DataView dv = new DataView(dt);         //过滤parentId，得到当前节点的所有子节点         dv.RowFilter = "ParentMenuID=" + ParentMenuID;         //foreach (DataRow b in dt.Rows)         //{         //    ParentMenuID = Convert.ToInt32(b["ParentMenuID"].ToString());                  //}         foreach (DataRowView drv in dv)         {             if (ParentMenuID == -1)             {                 System.Web.UI.WebControls.TreeNode tn1 = new System.Web.UI.WebControls.TreeNode();                 tn1.Text = drv["MenuName"].ToString(); //节点上要显示的名称                 tn1.Value = drv["MenuID"].ToString();                 tn1.ImageUrl = drv["Icon"].ToString();                 tn1.NavigateUrl = drv["MenuUrl"].ToString();  //点击节点名称，跳转到指定url页面                 tvMenu1.Nodes.Add(tn1); //将根节点加入到TreeView中去                 tn1.Expanded = true;                 //tn1.SelectAction = TreeNodeSelectAction.Expand;                 tn1.ShowCheckBox = false;                 //递归调用                 AddTreeNode(Int32.Parse(drv["MenuID"].ToString()), tn1);             }             else             {                 System.Web.UI.WebControls.TreeNode tn2 = new System.Web.UI.WebControls.TreeNode();                 tn2.Text = drv["MenuName"].ToString();                 tn2.Value = drv["MenuID"].ToString();                 tn2.ImageUrl = drv["Icon"].ToString();                 tn2.NavigateUrl = drv["MenuUrl"].ToString();                 pNode.ChildNodes.Add(tn2);                 tn2.ShowCheckBox = false;                 tn2.Expanded = true;                 //递归调用                 AddTreeNode(Int32.Parse(drv["MenuID"].ToString()), tn2);             }         }     }    }