树行

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Text;

namespace WindowsApplication5
{
 /// <summary>
 /// Form1 的摘要说明。
 /// </summary>
 public class Form1 : System.Windows.Forms.Form
 {
  private System.Windows.Forms.TreeView treeView1;
  private System.Windows.Forms.ImageList imageList1;
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.Button button2;
  private System.Windows.Forms.Label label1;
  private System.ComponentModel.IContainer components;

  public Form1()
  {
   //
   // Windows 窗体设计器支持所必需的
   //
   InitializeComponent();
            PopulateTree();
   //
   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
   //
  }

  /// <summary>
  /// 清理所有正在使用的资源。
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (components != null)
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }

  #region Windows 窗体设计器生成的代码
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {
   this.components = new System.ComponentModel.Container();
   this.treeView1 = new System.Windows.Forms.TreeView();
   this.imageList1 = new System.Windows.Forms.ImageList(this.components);
   this.button1 = new System.Windows.Forms.Button();
   this.button2 = new System.Windows.Forms.Button();
   this.label1 = new System.Windows.Forms.Label();
   this.SuspendLayout();
   //
   // treeView1
   //
   this.treeView1.ImageIndex = -1;
   this.treeView1.Location = new System.Drawing.Point(24, 0);
   this.treeView1.Name = "treeView1";
   this.treeView1.SelectedImageIndex = -1;
   this.treeView1.Size = new System.Drawing.Size(240, 216);
   this.treeView1.TabIndex = 0;
   this.treeView1.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this.treeView1_AfterSelect);
   //
   // imageList1
   //
   this.imageList1.ImageSize = new System.Drawing.Size(16, 16);
   this.imageList1.TransparentColor = System.Drawing.Color.Transparent;
   //
   // button1
   //
   this.button1.Location = new System.Drawing.Point(40, 240);
   this.button1.Name = "button1";
   this.button1.Size = new System.Drawing.Size(72, 24);
   this.button1.TabIndex = 1;
   this.button1.Text = "button1";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   //
   // button2
   //
   this.button2.Location = new System.Drawing.Point(124, 240);
   this.button2.Name = "button2";
   this.button2.Size = new System.Drawing.Size(72, 24);
   this.button2.TabIndex = 2;
   this.button2.Text = "button2";
   this.button2.Click += new System.EventHandler(this.button2_Click);
   //
   // label1
   //
   this.label1.Location = new System.Drawing.Point(224, 240);
   this.label1.Name = "label1";
   this.label1.Size = new System.Drawing.Size(72, 24);
   this.label1.TabIndex = 3;
   this.label1.Text = "label1";
   //
   // Form1
   //
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(320, 278);
   this.Controls.Add(this.label1);
   this.Controls.Add(this.button2);
   this.Controls.Add(this.button1);
   this.Controls.Add(this.treeView1);
   this.Name = "Form1";
   this.Text = "Form1";
   this.ResumeLayout(false);

  }
  #endregion

  /// <summary>
  /// 应用程序的主入口点。
  /// </summary>
  [STAThread]
  static void Main()
  {
   Application.Run(new Form1());
  }

  protected void PopulateTree()
  {
      TreeNode tnRooNode;
   treeView1.Nodes.Clear();
            tnRooNode=new TreeNode(Environment.MachineName,2,2);
   treeView1.Nodes.Add(tnRooNode);
   TreeNodeCollection tncDrives=tnRooNode.Nodes;
   string [] strLogicalDrives=Environment.GetLogicalDrives();
   string strCurrentDrive="";
   foreach(object obj in strLogicalDrives)
   {
       strCurrentDrive=(string )obj;
   }

   if(strCurrentDrive=="D://")
   {
    TreeNode tnDriveNode=new TreeNode(strCurrentDrive,3,3);
    tncDrives.Add(tnDriveNode);
    
   }
   else
   {
       TreeNode tnDriveNode=new TreeNode(strCurrentDrive);
    DirectoryInfo d=new DirectoryInfo(strCurrentDrive);
    ShowDirectories(d,tncDrives,4,4);
    

   }

  }

  public void ShowDirectories(DirectoryInfo d,TreeNodeCollection tncCollection ,int iImageIndex,int iSelectedImage)
  {
      TreeNode tnCurNode=new TreeNode(d.Name,iImageIndex,iSelectedImage);
    tncCollection.Add(tnCurNode);
   DirectoryInfo[]dirs;
   try
   {
    dirs=d.GetDirectories();
   }
   catch(Exception)
   {
      return;
   }
   foreach(DirectoryInfo dir in dirs)
   {
    try
    {
     ShowDirectories(dir,tnCurNode.Nodes,0,1);
    }
    catch(UnauthorizedAccessException){
        continue;
    }
   }
  }

  private void button1_Click(object sender, System.EventArgs e)
  {
   Clipboard.SetDataObject(this.label1,true);
   Application.Exit();

  }

  private void button2_Click(object sender, System.EventArgs e)
  {
   Application.Exit();
  }

  private void treeView1_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)
  {
   StringBuilder str=new StringBuilder();
   str.Insert(0,treeView1.SelectedNode.Text);
   TreeNode tcNode=treeView1.SelectedNode;
   while((tcNode=tcNode.Parent)!=null)
   {
    if(tcNode.Text.IndexOf('//')>=0)
    {
        string temp=tcNode.Text;
     int index=temp.IndexOf('//');
     temp.Remove(index,1);
     str.Insert(0,temp);

    }
    if(tcNode.Text==Environment.MachineName)
     break;
    str.Insert(0,tcNode.Text+"//");
    this.label1.Text=str.ToString();
   }
  }
 }
}