如何检测新文件或修改过的文件 [英] How to detect new or modified files

问题描述

我发现有两种解决方法， ReadDirectoryChangesW 和

I found there are two ways to approach it, ReadDirectoryChangesW and FindFirstChangeNotification.

我想知道两者之间在性能或其他方面有何不同?

I want to know what’s the difference between them, performance or otherwise?

推荐答案

这是为Winapi标记的，但无论如何我还是用.net对其进行了射击.

This is tagged for Winapi, but I give it a shot with .net anyway.

您可以为此使用System.IO中的FileSystemWatcher类.

You can use the FileSystemWatcher class from System.IO for this.

static void Main(string[] args)
{
    FileSystemWatcher fsw = new FileSystemWatcher("C:\\");
    fsw.Changed += new FileSystemEventHandler(fsw_Changed);
    fsw.Created += new FileSystemEventHandler(fsw_Created);
    fsw.Deleted += new FileSystemEventHandler(fsw_Deleted);
    fsw.EnableRaisingEvents = true;
    fsw.IncludeSubdirectories = true;
    fsw.Renamed += new RenamedEventHandler(fsw_Renamed);

    Console.Read();
}

static void fsw_Renamed(object sender, RenamedEventArgs e)
{
    Console.WriteLine("{0} was changed to {1}", e.OldName, e.Name);
}

static void fsw_Deleted(object sender, FileSystemEventArgs e)
{
    Console.WriteLine("{0} was deleted", e.Name);
}

static void fsw_Created(object sender, FileSystemEventArgs e)
{
    Console.WriteLine("{0} was created", e.Name);
}

static void fsw_Changed(object sender, FileSystemEventArgs e)
{
    Console.WriteLine("{0} was changed", e.Name);
}

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