C# 文件读取(二)

将我的电脑中的文件夹信息显示到TreeView控件上。 方法很多种，下面这种方法添加了我的文档。

 public partial class Form1 : Form
     {
         public Form1()
         {
             InitializeComponent();
         }

         private void Form1_Load(object sender, EventArgs e)
         {
             BindTreeView1();
         }

         private void BindTreeView1() {
             //添加我的电脑
             TreeNode rootNode = new TreeNode("我的电脑");
             rootNode.Tag = "我的电脑";
             rootNode.Text = "我的电脑";
             this.directoryTree.Nodes.Add(rootNode);

             //我的文档
             string myDocuments = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
             TreeNode DocNode = new TreeNode(myDocuments);
             DocNode.Text = "我的文档";
             DocNode.Tag = "我的文档";
             rootNode.Nodes.Add(DocNode);
             DocNode.Nodes.Add("");

             //循环便利计算机中所以的逻辑驱动器
             foreach (string drive in Environment.GetLogicalDrives())
             {
                 DriveInfo dir = new DriveInfo(drive);
                 switch (dir.DriveType)
                 {
                     case DriveType.Fixed:
                         TreeNode tNode = new TreeNode(dir.Name.Split(':')[]);
                         tNode.Name = dir.Name;
                         tNode.Tag = tNode.Name;
                         directoryTree.Nodes.Add(tNode);
                         tNode.Nodes.Add("");
                         break;
                 }
             }
             rootNode.Expand();
         }

         private void directoryTree_AfterExpand(object sender, TreeViewEventArgs e)
         {
             e.Node.Expand();
         }

         private void directoryTree_BeforeExpand(object sender, TreeViewCancelEventArgs e)
         {
             TreeViewItems.Add(e.Node);
         }
     }

     public static class TreeViewItems {

         public static void Add(TreeNode e) {

             if(e.Tag.ToString() != "我的电脑"){

                 e.Nodes.Clear();

                 TreeNode tNode = e;
                 string path = tNode.Name;

                 if (e.Tag.ToString() == "我的文档")
                 {
                     path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
                 }

                string [] dics=  Directory.GetDirectories(path);
                 foreach (string dic in dics)
                 {
                     TreeNode subNode = new TreeNode(new DirectoryInfo(dic).Name);
                     subNode.Name = new DirectoryInfo(dic).FullName;
                     subNode.Tag = subNode.Name;
                     tNode.Nodes.Add(subNode);
                     subNode.Nodes.Add("");
                 }
             }
         }
     }

显示文件夹