FolderBrowserDialog dialog = new FolderBrowserDialog();
dialog.Multiselect = false;
dialog.ShowDialog();

if (dialog.SelectedPaths != null && dialog.SelectedPaths.Length > 0)
{
    //賦值到文本框
    this.txtPath.Text = dialog.SelectedPaths[0].Trim();

}

public partial class MainWindow : Form
{
    private FileSystemWatcher? _fileWatcher;

    //這里的 directoryPath，就是上一步選擇的文件夾路徑
    public void StartMonitoring(string directoryPath)
    {
        // 創(chuàng)建 FileSystemWatcher 實(shí)例
        _fileWatcher = new FileSystemWatcher();
 
        // 設(shè)置要監(jiān)視的目錄路徑
        _fileWatcher.Path = directoryPath;
 
        // 設(shè)置要監(jiān)視的更改類型（例如：修改、創(chuàng)建、刪除）
        _fileWatcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
 
        // 添加事件處理程序
        _fileWatcher.Changed += OnChanged;
        _fileWatcher.Created += OnChanged;
        _fileWatcher.Deleted += OnChanged;
        _fileWatcher.Renamed += OnRenamed;
 
        // 開啟事件監(jiān)聽
        _fileWatcher.EnableRaisingEvents = true;
 
        Console.WriteLine($"已開始監(jiān)視文件夾: {directoryPath}");
    }
 
    private void OnChanged(object source, FileSystemEventArgs e)
    {
        Console.WriteLine($"文件或文件夾發(fā)生變更: {e.FullPath}，事件類型: {e.ChangeType}");
    }
 
    private void OnRenamed(object source, RenamedEventArgs e)
    {
        Console.WriteLine($"文件或文件夾被重命名: 舊路徑 {e.OldFullPath} -> 新路徑 {e.FullPath}");
    }
 
    public void StopMonitoring()
    {
        if (_fileWatcher != null)
        {
            // 停止引發(fā)事件
            _fileWatcher.EnableRaisingEvents = false;
 
            // 清理資源
            _fileWatcher.Dispose();
            _fileWatcher = null;
 
            Console.WriteLine("已停止監(jiān)視文件夾");
        }
    }
}