调用Directory.EnumerateFiles的BackgroundWorker在枚举完成之前完成

似乎是一个微不足道的问题。调用Directory.EnumerateFiles的BackgroundWorker在枚举完成之前完成

我有以下代码片段。 EnumerateFiles实际完成之前似乎完成的事件触发。例如，如果像C:\users\<user>\desktop这样的路径的tb_source.Text ...被设置为具有一百个左右项目的文件夹，则所有作品和reference.throttler_numer_of_files都被正确填充。

但是，看起来如果我设置这样说，C:\users\<user>它永远不会有机会找到所有事情，然后再继续完成事件。试图计算文件时可能遇到异常？

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();

来源

2013-07-17 Patrick Alexson

检查错误性质http://msdn.microsoft.com/de-de/library/system.componentmodel。 runworkercompletedeventargs（v = vs.80）.aspx – usr

无论何时你必须调用Thread.Sleep来同步事件，你都在做错事。 –