FileSystemWatcher无法检测到1个文件的更改（添加新文件），仅检测到至少2个文件

Question

FileSystemWatcher无法检测到 1 文件的更改（添加新文件），只能检测到至少 2 个文件。 观察者仅在以下情况下调用 Changed 事件：

  

  
• 将超过 1 个文件复制到 C：\ PortViewer
  
• 仅将 1 文件复制到 C：\ PortViewer ，我必须在文件资源管理器中打开 C：\ PortViewer （ Windows ）。
  

        FileSystemWatcher watcher;
        private void StartWatcher()
        {
            Directory.CreateDirectory(@"C:\PortViewer");
            watcher = new FileSystemWatcher();
            watcher.Path = @"C:\PortViewer";
            watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
                                   | NotifyFilters.FileName | NotifyFilters.DirectoryName;
            watcher.Filter = "*.*";
            watcher.Changed += (s,e) => { /*Do work here*/ };
            watcher.EnableRaisingEvents = true;
        }

Answer 1

NotifyFilters.CreatedTime是解决方案：

        FileSystemWatcher watcher;
        private void StartWatcher()
        {
            Directory.CreateDirectory(@"C:\PortViewer");
            watcher = new FileSystemWatcher();
            watcher.Path = @"C:\PortViewer";
            watcher.NotifyFilter = NotifyFilters.CreatedTime;
            watcher.Filter = "*.*";
            watcher.Changed += (s,e) => { /*Do work here*/ };
            watcher.EnableRaisingEvents = true;
        }