ASP.NET中用TreeView 浏览网站目录内容

protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {

　　　　　 TreeNode node2 = new TreeNode();
                node2.Text = "根目录";
                node2.Value = Server.MapPath("../");
                TreeView2.Nodes.Add(node2);
                getsubfile(TreeView2.Nodes[0]);
            }
        }

        /// <summary>   
       /// 显示所选节点下所有的文件和文件夹，用递归显示，一次性完整显示，如果文件过多性能很差，   
       /// 可以每次只显示2层，然后选择显示   
       ///  </summary>   
       /// <param name="tn">选择的节点</param>   
       /// <returns></returns>   
        public bool getsubfile(TreeNode tn)
        {
            DirectoryInfo di = new DirectoryInfo(tn.Value);
            int allNum = di.GetDirectories().Length + di.GetFiles("*.*").Length;
            if (allNum == 0) //如果其下的文件和文件夹为空则返回       
            {
                return false;
            }
            //循环显示文件夹 每个节点只设置Name和Value，value存完整路径。       
            foreach (DirectoryInfo subdir in di.GetDirectories())
            {
               
                    TreeNode subtd = new TreeNode();
                    subtd.Text = subdir.Name;
                    subtd.Value = subdir.FullName;
                    tn.ChildNodes.Add(subtd);
                    getsubfile(subtd);
               
            }
            //循环显示文件       
            foreach (FileInfo subfile in di.GetFiles())
            {
                if (subfile.Extension == ".aspx" || subfile.Extension == ".html" || subfile.Extension == ".gif" || subfile.Extension == ".jpg")
                {
                    TreeNode subtd = new TreeNode();
                    subtd.Text = subfile.Name;
                    subtd.Value = subfile.FullName;
                    tn.ChildNodes.Add(subtd);
                }
            }
            return true;
        }