文件复制后的文件系统观察程序 onChanged

Question

此代码来自另一个堆栈答案，基本上我正在尝试查看用户文件夹中的新文件，我知道 OnCreate 会在新文档完全“复制/下载”之前触发，我正在尝试什么要做的是在每个 onChange 事件中复制它，但是尽管 Microsoft 文档说它完成，但复制似乎不会触发 onChange？

作为记录 onCreate 工作正常。 waitingForClose 被声明为公共字符串列表，onCreate 添加文件罚款。

   private void MetroWindow_Loaded(object sender, RoutedEventArgs e)
    {
        FileSystemWatcher watcher = new FileSystemWatcher();
        watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.Size;
        watcher.Path = @"C:\Users\MyUser";
        watcher.IncludeSubdirectories = true;
        watcher.Created += new FileSystemEventHandler(onCreate);
        watcher.Changed += new FileSystemEventHandler(onChanged);
        watcher.EnableRaisingEvents = true;
    }

onCreate - 这会触发：

  void onCreate(object sender, FileSystemEventArgs e)
    {
        var fileName = e.Name;
        var destPath = @"C:\Users\myUser\Desktop\someFolder";
        var destfile = System.IO.Path.Combine(destPath, fileName);
        if (fileName.Substring(fileName.Length - 3, 3) == "doc" || fileName.Substring(fileName.Length - 3, 3) == "pdf" || fileName.Substring(fileName.Length - 4, 4) == "docx")
        {
            try
            {
                System.IO.File.Copy(e.FullPath, destfile, true);
            }
            catch
            {
                waitingForClose.Add(e.FullPath);
            }
          Console.WriteLine("File:" + e.FullPath + " " + e.ChangeType);

        }
    }

onChanged- 这永远不会触发文件，即使在复制期间也是如此：

void onChanged(object sender, FileSystemEventArgs e)
{
    var fileName = e.Name;
    var destPath = @"C:\Users\myUser\Desktop\someFolder";
    var destfile = System.IO.Path.Combine(destPath, fileName);

    if (fileName.Substring(fileName.Length - 3, 3) == "doc" || fileName.Substring(fileName.Length - 3, 3) == "pdf" || fileName.Substring(fileName.Length - 4, 4) == "docx")
    {


        if (waitingForClose.Contains(e.FullPath))
        {
            try
            {
                System.IO.File.Copy(e.FullPath, destfile, true);
                waitingForClose.Remove(e.FullPath);
            }
            catch { }
        }
    }

}

好吧，从外观上看，这是一个 Windows 8 问题，很快就会发布解决方案！

Answer 1

好的，

从外观上看，FilesystemWatcher onChanged 事件在 Windows 8.1 中充其量是不确定的（目前已损坏）。

我最终做的是从 onCreate 创建一个文件数组，然后尝试每 5 秒从该数组复制一次：像这样：

   void onCreate(object sender, FileSystemEventArgs e)
    {
        var fileName = e.Name;
        var destPath = @"C:\Users\myuser\Desktop\Repo";
        var destfile = System.IO.Path.Combine(destPath, fileName);
        if (fileName.Substring(fileName.Length - 3, 3) == "doc" || fileName.Substring(fileName.Length - 3, 3) == "pdf" || fileName.Substring(fileName.Length - 4, 4) == "docx")
        {
// We don't want to track the file if it's triggered a created event because it's copied to our repo.
            if (!fileName.Contains("Repo"))
            {
                try
                {
                    System.IO.File.Copy(e.FullPath, destfile, true);
                }
                catch
                {
                   waitingForClose.Add(e.FullPath);
                }
                Console.WriteLine("File:" + e.FullPath + " " + e.ChangeType);

            } // if (!fileName.Contains("repo"))
        } //  if (fileName.Substring(fileName.Length
    } // void onCreate(

所以现在我们有一个文件数组，我们正在等待实际完成创建我正在 Window_onLoad 事件中执行此操作：

   System.Windows.Threading.DispatcherTimer dispatcherTimer = new System.Windows.Threading.DispatcherTimer();
    dispatcherTimer.Tick += new EventHandler(onTick);
    dispatcherTimer.Interval = new TimeSpan(0, 0, 5);
    dispatcherTimer.Start();

现在在 OnTick 活动中

  void onTick(object sender, EventArgs e)
    {
        List<String> tempList = new System.Collections.Generic.List<String>();

        foreach(String item in waitingForClose){

              try
              {
                    System.IO.File.Copy(System.IO.Path.GetFullPath(item), @"C:\Users\myuser\Desktop\Repo\" + System.IO.Path.GetFileName(item), true);
                    tempList.Add(item);
                }
                catch  {
                    // Do nothing
                }
            }
        waitingForClose.RemoveAll(i => tempList.Contains(i));
    }