监控文件是否被更改

经常我们会碰到如果某个文件被更改,能够做出对应的操作。

public class FileWatch

{

  public static FileSystemWatcher _fileWatcher;

  private static readonly object _lockObj = new object();

  private static void SetWatch(string path)

  {

    if(_fileWatcher==null)

    {

      lock(_lockObj)

      {

        if(_fileWatcher==null)

        {

          FileInfo file=new FileInfo(path);

          _fileWatcher=new FileSystemWatcher(file.DirectoryName);

          _fileWatcher.Filter=file.Name;

          _fileWatcher.NotifyFilter=NotifyFilters.LastWrite;

          _fileWatcher.EnableRaisingEvents=true;

          _fileWatcher.Changed+=new FileSystemEventHandler(_watcher_Changed);

        }

      }

    }

  }

  

  static void _watcher_Changed(object sender,FileSystemEventArgs e)

  {

    try

    {

      HttpRuntime.UnloadAppDomain();

    }

    catch

    {

      

    }

  }

 

  

}

posted @ 2013-01-04 12:04  chasecnblogs  阅读(439)  评论(1编辑  收藏  举报