C#实现实时监控文件夹变化

using System.IO;

public class FileFolderMonitor
{
    private FileSystemWatcher _fileWatcher;

    public void StartMonitoring(string directoryPath)
    {
        // 创建 FileSystemWatcher 实例
        _fileWatcher = new FileSystemWatcher();

        // 设置要监视的目录路径
        _fileWatcher.Path = directoryPath;

        // 设置要监视的更改类型（例如：修改、创建、删除）
        _fileWatcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;

        // 添加事件处理程序
        _fileWatcher.Changed += OnChanged;
        _fileWatcher.Created += OnChanged;
        _fileWatcher.Deleted += OnChanged;
        _fileWatcher.Renamed += OnRenamed;

        // 开启事件监听
        _fileWatcher.EnableRaisingEvents = true;

        Console.WriteLine($"已开始监视文件夹: {directoryPath}");
    }

    private void OnChanged(object source, FileSystemEventArgs e)
    {
        Console.WriteLine($"文件或文件夹发生变更: {e.FullPath}，事件类型: {e.ChangeType}");
    }

    private void OnRenamed(object source, RenamedEventArgs e)
    {
        Console.WriteLine($"文件或文件夹被重命名: 旧路径 {e.OldFullPath} -> 新路径 {e.FullPath}");
    }

    public void StopMonitoring()
    {
        if (_fileWatcher != null)
        {
            // 停止引发事件
            _fileWatcher.EnableRaisingEvents = false;

            // 清理资源
            _fileWatcher.Dispose();
            _fileWatcher = null;

            Console.WriteLine("已停止监视文件夹");
        }
    }
}

public static string SelectFolder(string description = "请选择一个文件夹：", Environment.SpecialFolder rootFolder = Environment.SpecialFolder.MyComputer)
    {
        using (FolderBrowserDialog folderDialog = new FolderBrowserDialog())
        {
            folderDialog.Description = description;
            folderDialog.RootFolder = rootFolder;

            if (folderDialog.ShowDialog() == DialogResult.OK)
            {
                return folderDialog.SelectedPath;
            }
        }
        return string.Empty;
    }

string selectedFolder = SelectFolder("请选择一个保存位置：", Environment.SpecialFolder.Desktop);

string myComputerSelectedFolder = SelectFolder();

string selectedFolderPath = SelectFolder();
if (!string.IsNullOrEmpty(selectedFolderPath))
{
    StartMonitoring(selectedFolderPath);
}