C#监控文件夹变化

当需要监控某一文件，FileSystemWatcher类提供了Created, Deleted,Rename等事件。

就拿FileSystemWatcher的Created事件来说，该事件类型是FileSystemEventHandler。

public delgate void FileSystemEventHandler(Object sender, FileSystemEventArgs e)

○ sender表示事件的发起者
○ e表示事件参数

在C盘创建temp文件夹。

客户端。

class Program

{

static void Main(string[] args)

    {

var watcher = new FileSystemWatcher(@"c:\temp");

watcher.EnableRaisingEvents = true; //启用FileSystemWatcher

watcher.Created += new FileSystemEventHandler(OnCreated);

watcher.Deleted += new FileSystemEventHandler(OnDeleted);

watcher.Renamed += new RenamedEventHandler(OnRenamed);

Console.ReadKey();

}

static void OnDeleted(object sender, FileSystemEventArgs e)

    {

Console.WriteLine("{0}:{1}", e.ChangeType, e.Name);

}

static void OnCreated(object sender, FileSystemEventArgs e)

    {

Console.WriteLine("{0}:{1}", e.ChangeType, e.Name);

}

static void OnRenamed(object sender, RenamedEventArgs e)

    {

Console.WriteLine("{0}:原文件名{1},新文件名{2}", e.ChangeType, e.OldName, e.Name);

}

}

当然，可以通过 watcher.Renamed += OnCreated;注册事件。