C#实现Winform监控文件夹变化以及监控文件操作教程

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

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

}

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

    //这里的 directoryPath，就是上一步选择的文件夹路径
    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");
        }
    }
}