調用Directory.EnumerateFiles的BackgroundWorker在枚舉完成之前完成

似乎是一個微不足道的問題。調用Directory.EnumerateFiles的BackgroundWorker在枚舉完成之前完成

我有以下代碼片段。 EnumerateFiles實際完成之前似乎完成的事件觸發。例如，如果像C:\users\<user>\desktop這樣的路徑的tb_source.Text ...被設置爲具有一百個左右項目的文件夾，則所有作品和reference.throttler_numer_of_files都被正確填充。

但是，看起來如果我設置這樣說，C:\users\<user>它永遠不會有機會找到所有事情，然後再繼續完成事件。試圖計算文件時可能遇到異常？

Suggesetions？

// count number of files within source directory (and within subdirectories) 
BackgroundWorker bw = new BackgroundWorker(); 
bw.WorkerReportsProgress = true; 

bw.DoWork += new DoWorkEventHandler(
    delegate(object o, DoWorkEventArgs args) 
    { 
     Thread.Sleep(2000); // give the current UI a moment to load 
     reference.throttler_number_of_files = Directory.EnumerateFiles(tb_source.Text, "*.*", SearchOption.AllDirectories).Count(); 
    } 
); 

bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(
    delegate(object o, RunWorkerCompletedEventArgs args) 
    { 
     // success, clear to launch! 
     form_throttler_copy throttler_copy = new form_throttler_copy(); 
     throttler_copy.Show(); 
     this.Dispose(); 
    } 
); 

label_status.Text = "Creating manifest of files... please wait"; 
picturebox_loading.Visible = true; 

bw.RunWorkerAsync();

來源

2013-07-17 Patrick Alexson

檢查錯誤性質http://msdn.microsoft.com/de-de/library/system.componentmodel。 runworkercompletedeventargs（v = vs.80）.aspx – usr

無論何時你必須調用Thread.Sleep來同步事件，你都在做錯事。 –