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);

  }

}