C#实现获取系统目录并以Tree树叉显示的方法

本文讲述c#获取windows系统目录，如何目录遍历以及将信息捆绑在treeview中显示出来的实现方法，具体实现代码如下：

using system;
using system.drawing;
using system.collections;
using system.componentmodel;
using system.windows.forms;
using system.data;
using system.io; 
namespace 获取系统目录
{
 public class form1 : system.windows.forms.form
 {
 private system.windows.forms.treeview treeview1;
 private system.componentmodel.icontainer components;
 private system.windows.forms.button button2;
 private system.windows.forms.label label2;
 private system.windows.forms.button button1;
 private system.windows.forms.textbox textbox1;
 private system.windows.forms.label label1; 
 public form1()
 {
  initializecomponent();
  filltree(treeview1, true); // 显示所有文件夹以及文件
 }
 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
 private void initializecomponent()
 {
  this.textbox1 = new system.windows.forms.textbox();
  this.label2 = new system.windows.forms.label();
  this.label1 = new system.windows.forms.label();
  this.treeview1 = new system.windows.forms.treeview();
  this.button1 = new system.windows.forms.button();
  this.button2 = new system.windows.forms.button();
  this.suspendlayout();
  this.textbox1.location = new system.drawing.point(280, 56);
  this.textbox1.multiline = true;
  this.textbox1.name = "textbox1";
  this.textbox1.size = new system.drawing.size(208, 192);
  this.textbox1.tabindex = 3;
  this.textbox1.text = "";
  this.label2.autosize = true;
  this.label2.location = new system.drawing.point(280, 24);
  this.label2.name = "label2";
  this.label2.size = new system.drawing.size(116, 17);
  this.label2.tabindex = 4;
  this.label2.text = "文件夹或文件信息：";
  this.label1.autosize = true;
  this.label1.location = new system.drawing.point(16, 24);
  this.label1.name = "label1";
  this.label1.size = new system.drawing.size(153, 17);
  this.label1.tabindex = 5;
  this.label1.text = "请选择一个文件夹或文件：";
  this.treeview1.imageindex = -1;
  this.treeview1.location = new system.drawing.point(16, 56);
  this.treeview1.name = "treeview1";
  this.treeview1.selectedimageindex = -1;
  this.treeview1.size = new system.drawing.size(184, 192);
  this.treeview1.tabindex = 6;
  this.button1.location = new system.drawing.point(216, 104);
  this.button1.name = "button1";
  this.button1.size = new system.drawing.size(48, 32);
  this.button1.tabindex = 7;
  this.button1.text = "显示";
  this.button1.click += new system.eventhandler(this.button1_click);
  this.button2.location = new system.drawing.point(216, 168);
  this.button2.name = "button2";
  this.button2.size = new system.drawing.size(48, 32);
  this.button2.tabindex = 8;
  this.button2.text = "清空";
  this.button2.click += new system.eventhandler(this.button2_click);
  this.autoscalebasesize = new system.drawing.size(6, 14);
  this.clientsize = new system.drawing.size(504, 277);
  this.controls.add(this.button2);
  this.controls.add(this.button1);
  this.controls.add(this.treeview1);
  this.controls.add(this.label1);
  this.controls.add(this.label2);
  this.controls.add(this.textbox1);
  this.name = "form1";
  this.text = "form1";
  this.resumelayout(false);
 }
 #endregion
 [stathread]
 static void main() 
 {
  application.run(new form1());
 }
 // 填充目录和文件到 treeview 控件中
 // issource 表示是否显示文件
 private void filltree(treeview treeview,bool issource)
 {
  treeview.nodes.clear(); // 清空
  // 获取系统上的所有逻辑驱动器
  string[] strdrives = environment.getlogicaldrives();
  foreach(string rootdirectoryname in strdrives)
  {
  try
  {
   // 获取驱动器*目录列表
   directoryinfo dir = new directoryinfo(rootdirectoryname);
   
   // 如果获得的目录信息正确，则将它添加到 treeview 控件中
   if (dir.exists == true)
   {
   treenode newnode = new treenode(rootdirectoryname);
   treeview.nodes.add(newnode);
   if (issource)
   {
    getsubdirectorynodes(newnode, newnode.text, true);
   }
   else
   {
    getsubdirectorynodes(newnode, newnode.text, false);
   }
   }
  }
  catch(exception e)
  {
   messagebox.show(e.message);
  }
  }
 }
 // 遍历子目录
 private void getsubdirectorynodes(treenode parentnode, string fullname, bool getfilenames)
 {
  directoryinfo dir = new directoryinfo(fullname);
  directoryinfo[] subdirs = dir.getdirectories();
  // 为每一个子目录添加一个子节点
  foreach(directoryinfo subdir in subdirs)
  {
  // 不显示隐藏文件夹
  if((subdir.attributes & fileattributes.hidden) != 0)
  {
   continue;
  }
  treenode subnode = new treenode(subdir.name);
  parentnode.nodes.add(subnode);
  // 递归调用getsubdirectorynodes
  getsubdirectorynodes(subnode, subdir.fullname, getfilenames);
  }
  // 获取目录中的文件
  if(getfilenames)
  {
  fileinfo[] files = dir.getfiles();
  foreach(fileinfo file in files)
  {
   treenode filenode = new treenode(file.name);
   parentnode.nodes.add(filenode);
  }
  }
 }
 private void button1_click(object sender, system.eventargs e)
 {
  try
  {
  treenode selectednode = treeview1.selectednode;  
  directoryinfo info = new directoryinfo(selectednode.fullpath);
  string [] strarray = new string[4];
  strarray[0] = "完整路径名 : "+ info.fullname;
  strarray[1] = "创建时间 : "+ info.creationtime.tostring();
  strarray[2] = "上次访问时间 : "+ info.lastaccesstime.tostring();
  strarray[3] = "上次写入时间 : "+ info.lastwritetime.tostring();
  textbox1.lines = strarray;
  }
  catch(exception exc)
  {
  messagebox.show(exc.message);
  }
 }
 private void button2_click(object sender, system.eventargs e)
 {
  textbox1.text = "";
 }
 }
}