b/s 资源管理器哪样的功能，怎么实现，急

Question

b/s 资源管理器哪样的功能，怎么实现

Answer 1

 // 即将要展开一个节点时触发
        private void FirsttreeView_BeforeExpand(object sender, TreeViewCancelEventArgs e)
        {
            Cursor c = this.Cursor;
            this.Cursor = Cursors.WaitCursor;
            try
            {                for (int i = 0; i < e.Node.Nodes.Count; i++)
                {
                    DirectoryInfo arr = new DirectoryInfo(e.Node.Nodes[i].FullPath);
                    DirectoryInfo[] arrs = null;
                    try
                    {
                        arrs = arr.GetDirectories();
                    }
                    catch
                    {
                        continue;
                    }
                        for (int j = 0; j < arrs.Length; j++)
                    {
                        e.Node.Nodes[i].Nodes.Add(arrs[j].Name);
                        e.Node.Nodes[i].Nodes[j].ImageIndex = 1;
                        e.Node.Nodes[i].Nodes[j].SelectedImageIndex = 2;
                    }
                    
                }
            }
            finally
            { 
                this.Cursor=c; 
            }
        }