using System;
using System.IO;
public class watcher 
{
  public static void Main(string[] args) 
  {
    //如果沒(méi)有指定目錄，則退出程序
    if(args.Length!=1) 
    {
      //顯示調(diào)用程序的正確方法
      Console.WriteLine("usage:Watcher.exe(directory)");
      return;
    }
    //創(chuàng)建一個(gè)新的FileSystemWatcher并設(shè)置其屬性
    FileSystemWatcher watcher=new FileSystemWatcher();
    watcher.Path=args[O];
    /*監(jiān)視LastAcceSS和LastWrite時(shí)間的更改以及文件或目錄的重命名*/
    watcher.NotifyFilter=NotifyFilters.LastAccess | NotifyFilters.LastWrite |
           NotifyFilters.FileName | NotifyFilters.DirectoryName;
    //只監(jiān)視文本文件
    watcher.Filter="*.txt";
    //添加事件句柄
    //當(dāng)由FileSystemWatcher所指定的路徑中的文件或目錄的
    //大小、系統(tǒng)屬性、最后寫(xiě)時(shí)間、最后訪問(wèn)時(shí)間或安全權(quán)限
    //發(fā)生更改時(shí)，更改事件就會(huì)發(fā)生
    watcher.Changed +=new FileSystemEventHandler(OnChanged);
    //由FileSystemWatcher所指定的路徑中文件或目錄被創(chuàng)建時(shí)，創(chuàng)建事件就會(huì)發(fā)生
    watcher.Created +=new FileSystemEventHandler(OnChanged);
    //當(dāng)由FileSystemWatcher所指定的路徑中文件或目錄被刪除時(shí)，刪除事件就會(huì)發(fā)生
    watcher.Deleted +=new FileSystemEventHandler(OnChanged) ;
    //當(dāng)由FileSystemWatcher所指定的路徑中文件或目錄被重命名時(shí)，重命名事件就會(huì)發(fā)生
    watcher.Renamed +=new RenamedEventHandler(OnRenamed);
    //開(kāi)始監(jiān)視
    watcher.EnableRaisingEvents=true;
    //等待用戶退出程序
    Console.WriteLine("Press\'q\' to quit the sample.");
    while(Console.Read()!='q');
  }
  //定義事件處理程序
  public static void OnChanged(object sender,FileSystemEventArgs e) 
  {
    //指定當(dāng)文件被更改、創(chuàng)建或刪除時(shí)要做的事
    Console.WriteLine("file:"+e.FullPath+""+e.ChangeType);
  }
  public static void OnRenamed(object sender,RenamedEventArgs e) 
  {
    //指定當(dāng)文件被重命名時(shí)發(fā)生的動(dòng)作
    Console.WriteLine("Fi]e:{0} renamed to{1}",e.OldFullPath,e.FullPath);
  }
}