c# - 继承问题

Question

我创建了一个类:

public class AbortableBackgroundWorker : BackgroundWorker
{



  private Thread workerThread;

    protected override void OnDoWork(DoWorkEventArgs e)
    {
        workerThread = Thread.CurrentThread;
        try
        {
            base.OnDoWork(e);
        }
        catch (ThreadAbortException)
        {
            e.Cancel = true; //We must set Cancel property to true!
            Thread.ResetAbort(); //Prevents ThreadAbortException propagation
        }
    }


    public void Abort()
    {
        if (workerThread != null)
        {
            workerThread.Abort();
            workerThread = null;
        }
    }
}

下面是我的使用方法:

  backgroundWorker1 = new AbortableBackgroundWorker();
//...
backgroundWorker1.RunWorkerAsync();

if (backgroundWorker1.IsBusy == true)
{
    backgroundWorker1.Abort();//This method is unavailable :(
    backgroundWorker1.Dispose();
}

另一个小问题..这段代码会取消后台 worker 吗？

Answer 1

这不是中止 BackgroundWorker 任务的正确方法...使用 CancelAsync方法和 CancellationPending属性(property)代替。您几乎不应该中止线程，至少在您可以干净地退出此线程时不要中止。