c#如何监视文件或者文件夹的变化

可以使用FileSystemWatcher类来监视文件或者文件夹的变化。

下面的代码可以用来监视重命名的行为。

FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = @"C:\MyDirectory";
watcher.Renamed += new RenamedEventHandler(watcher_Renamed)
watcher.EnableRaisingEvents = true;

void watcher_Renamed(object sender, RenamedEventArgs e)
{
  Console.WriteLine("File Renamed: Old Name: " + e.OldName +
    " New Name: " + e.Name);
}　　　　

 

FileSystemWatcher类的其他事件如下：

watcher.Deleted += new FileSystemEventHandler(watcher_Deleted);
watcher.Changed += new FileSystemEventHandler(watcher_Changed);
watcher.Created += new FileSystemEventHandler(watcher_Created);

这些事件都传递一个 FileSystemEventArgs参数，这个参数包含 filename, full path, what action caused the event 等信息.