在 C# 中处理调用 Web 服务时如何取消 bacgroundworker

Question

如何在 C# 中取消线程，当我调用 Web 服务时，例如：

这段代码如下：

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、函数或事件点击取消线程，你能帮帮我吗？

我不开发 Web 服务，我只使用方法。我在 C# 中使用 3.5 框架。

Answer 1

有一种方法可以取消BackgroundWorker：

doWorkAnuncios.CancelAsync();

然后你可以做一些事情，如果它被取消或没有在完成的功能：

    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
        }
    }