我怎样才能取消bacgroundworker在C＃中处理调用Web服务时

Question

如何取消C＃中的线程，当我调用Web服务，例如：

这下面的代码：

private BackgroundWorker doWorkAnuncios; 
public myclass() 
{ 
    doWorkAnuncios = new BackgroundWorker(); 
    doWorkAnuncios.WorkerSupportsCancellation = true; 
} 

public void someMethod() 

{ 
    doWorkAnuncios.RunWorkerCompleted += new RunWorkerCompletedEventHandler(doWorkAnuncios_RunWorkerCompleted); 
         doWorkAnuncios.DoWork += new DoWorkEventHandler(doWorkAnuncios_DoWork); 
         doWorkAnuncios.RunWorkerAsync(); 
} 



private void doWorkAnuncios_DoWork(object sender, DoWorkEventArgs e)//Call the web service 
    { 
     _dataCustomer = new Customers(); //this object sends the customer number 
     _lstCustomers = _dataCustomer.GetDetailsCustomers(CustomerNumber);//Send a customer number 

     //In this part check the CancellationPending, but when it finish the process in the web service, 
     //if i decide to cancel the process, it do not cancell the request.** 

     if (doWorkAnuncios.CancellationPending)//try to cancel the background 
     { 
      e.Cancel = true; 
      return; 
     } 
    } 

我想用方法，函数或事件点击来取消线程，你能否帮我一下。

我不开发Web服务，我只使用这些方法。我在C＃中使用3.5框架。

Answer 1

有取消BackgroundWorker的方法：

doWorkAnuncios.CancelAsync(); 

，然后你可以做的东西，如果它是在完成功能取消与否：

private void doWorkAnuncios_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) 
    { 
     if ((e.Cancelled == true)) 
     { 
      //do something if it was cancelled 
     } 

     else if (!(e.Error == null)) 
     { 
      //when an error occur 
     } 

     else 
     { 
      //ended the background with no problems or cancel, just like you have 
     } 
    }