C#中FileSystemWatcher类实现监控文件夹

using System;
using System.IO;

class Program
{
    static void Main()
    {
        // 创建FileSystemWatcher实例
        FileSystemWatcher watcher = new FileSystemWatcher();

        // 设置要监视的目录
        watcher.Path = @"C:\YourFolderToWatch";

        // 过滤条件，例如只监控.txt文件
        watcher.Filter = "*.txt";

        // 通知过滤器，设置需要监控的事件类型
        watcher.NotifyFilter = NotifyFilters.FileName | NotifyFilters.LastWrite;

        // 注册事件处理器
        watcher.Created += OnFileCreated;
        watcher.Deleted += OnFileDeleted;
        watcher.Changed += OnFileChanged;
        watcher.Renamed += OnFileRenamed;

        // 开始监控
        watcher.EnableRaisingEvents = true;

        // 保持控制台开启，以便接收事件
        Console.WriteLine("Press 'Enter' to quit the sample.");
        Console.ReadLine();

        // 停止监控
        watcher.EnableRaisingEvents = false;
    }

    // 当文件被创建时触发
    private static void OnFileCreated(object source, FileSystemEventArgs e)
    {
        Console.WriteLine($"File: {e.FullPath} has been created.");
    }

    // 当文件被删除时触发
    private static void OnFileDeleted(object source, FileSystemEventArgs e)
    {
        Console.WriteLine($"File: {e.FullPath} has been deleted.");
    }

    // 当文件被修改时触发
    private static void OnFileChanged(object source, FileSystemEventArgs e)
    {
        Console.WriteLine($"File: {e.FullPath} has been changed.");
    }

    // 当文件被重命名时触发
    private static void OnFileRenamed(object source, RenamedEventArgs e)
    {
        Console.WriteLine($"File: {e.OldFullPath} has been renamed to {e.FullPath}.");
    }
}