将方法传递给BackgroundWorker.DoEvent C＃

我正在尝试使一个常规函数作为匿名BackgroundWorker的DoWork事件运行。我遇到的问题是该方法根本没有运行。目前的代码，我有如下; -将方法传递给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); 
    } 
}

功能是通过这样的： -

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

workerThread.Start();

怎么可能通过该方法，并将它的后台工作范围内操作？

来源

2016-04-28 Chris Graves

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

@mlg已经看到了这个问题。尝试了这些建议，但他们没有工作。因此，为什么我不得不再次提出这个问题。 –

从它的外观来看，您只是将操作本身作为结果分配，而不是调用它。

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

此外，等待循环可能会导致问题。至少把

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

在那里

或者使用清洁剂（无忙等待）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(); 
    } 
}

来源

2016-04-28 11:36:57

将方法传递给BackgroundWorker.DoEvent C＃

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