將方法傳遞給BackgroundWorker.DoEvent C＃

我正在嘗試使一個常規函數作爲匿名BackgroundWorker的DoWork事件運行。我遇到的問題是該方法根本沒有運行。目前的代碼，我有如下; -將方法傳遞給BackgroundWorker.DoEvent C＃

public class Worker 
{ 
    BackgroundWorker worker; 
    public Worker(Func<bool> action) 
    { 
     worker = new BackgroundWorker(); 
     worker.DoWork += (sender, e) => e.Result = action; 
     worker.RunWorkerCompleted += Worker_RunWorkerCompleted; 
     this.action = action; 
    } 

    private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) 
    { 
     Console.WriteLine("Thread completed : "+ e.Result.ToString()); 
    } 

    public void DoWork() 
    { 
     Console.WriteLine("worker thread: working..."); 
     worker.RunWorkerAsync(); 
     //Wait for worker to complete 
     do { } while (worker.IsBusy); 
    } 
}

功能是通過這樣的： -

Worker workerObject = new Worker(new Func<bool>(() => methodThatReturnsBool(param1, param2))); 
Thread workerThread = new Thread(workerObject.DoWork); 

workerThread.Start();

怎麼可能通過該方法，並將它的後臺工作範圍內操作？

來源

2016-04-28 Chris Graves

http://stackoverflow.com/questions/3475263/passing-a -method-a-backgroundworker-dowork？rq = 1 – mlg

@mlg已經看到了這個問題。嘗試了這些建議，但他們沒有工作。因此，爲什麼我不得不再次提出這個問題。 –

從它的外觀來看，您只是將操作本身作爲結果分配，而不是調用它。

worker.DoWork += (sender, e) => e.Result = action();

此外，等待循環可能會導致問題。至少把

do {Thread.Yield();} while (worker.IsBusy);

在那裏

或者使用清潔劑（無忙等待）的方法：

public class Worker 
{ 
    private BackgroundWorker _worker; 
    private AutoResetEvent _event; 
    private Func<bool> _action; 

    public Worker(Func<bool> action) 
    { 
     _action = action; 
     _event = new AutoResetEvent(false); 
     _worker = new BackgroundWorker(); 
     _worker.DoWork += (sender, e) => 
     { 
      try 
      { 
       e.Result = _action(); 
      } 
      finally 
      { 
       _event.Set(); 
      } 
     }; 
     _worker.RunWorkerCompleted += Worker_RunWorkerCompleted; 
    } 

    private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) 
    { 
     Console.WriteLine("Thread completed : "+ e.Result.ToString()); 
    } 

    public void DoWork() 
    { 
     Console.WriteLine("worker thread: working..."); 
     _worker.RunWorkerAsync(); 
     _event.WaitOne(); 
    } 
}

來源

2016-04-28 11:36:57

將方法傳遞給BackgroundWorker.DoEvent C＃

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