自制Windows Mobile的文件浏览器

使用Windows 自带的文件浏览器只能察看My Doucument中间的文件，这叫人非常不爽。
于是我自己就做了一个文件浏览器

    public partial class FileExplorerDll : UserControl
    {
        public FileExplorerDll()
        {
            InitializeComponent();
            addNode(this.treeView1);
        }

        private string selectName;

        public string SelectName
        {
            get 
            {
                return selectName;
            }
        }

        public new void Show()
        {
            this.Visible = true;
        }
   
        private void addNode(TreeView tv)
        {
            string[] dirNames = Directory.GetDirectories(@"\");
            string[] fileNames = Directory.GetFiles(@"\");
            int index = 0;
           
            foreach (string dirName in dirNames)
            {
                tv.Nodes.Add(dirName);
                addNode(treeView1.Nodes[index], dirName);
                tv.Nodes[index].ImageIndex = 0;
                index++;
            }
            foreach (string fileName in fileNames)
            {
                tv.Nodes.Add(fileName);
                tv.Nodes[index].ImageIndex = 1;
                index++;
            }
        }

        private void addNode(TreeNode tn, string path)
        {
            string[] dirNames;
            string[] fileNames;
            int index = 0;

            if (Directory.Exists(path))
            {
                dirNames = Directory.GetDirectories(path);

                foreach (string dirName in dirNames)
                {
                    tn.Nodes.Add(dirName.Remove(0, path.Length));
                    addNode(tn.Nodes[index], dirName);
                    tn.Nodes[index].ImageIndex = 0;
                    index++;
                }

                fileNames = Directory.GetFiles(path);

                foreach (string fileName in fileNames)
                {
                    tn.Nodes.Add(fileName.Remove(0, path.Length));
                    tn.Nodes[index].ImageIndex = 1;
                    index++;
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            selectName = this.treeView1.SelectedNode.FullPath;
            this.Visible = false;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            selectName = "";
            this.Visible = false;
        }
    }

基本功能实现了，可是加载的速度实在是慢！

还有一个巨大的缺陷，就是用户通过我的这个界面选择的文件地址无法返回，请高手指教，谢谢！