c# - 等待BackgroundWorker RunWorkerCompleted

Question

在主线程中我有一个计时器。在 Tick 事件中，我运行一个 BackgroundWorker。我在那里做了一些事情，然后 BackgroundWorker 调用 RunWorkerCompleted 事件。

在主线程中，我有函数Stop。此函数禁用定时器。但我想等 BackgroundWorker 当他工作时。

例如:

public void Next()
{

    // Start the asynchronous operation
    if (!this._backgroundWorker.IsBusy)
        this._backgroundWorker.RunWorkerAsync();

}

private void _backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
    DoSomething();

}


private void _backgroundWorker_RunWorkerCompleted(object sender, 
    RunWorkerCompletedEventArgs e)
{
    DoSomethingElse();
}

public void Stop()
{
    this._timer.Enabled = false;
}

所以我的问题是如何等待BackgroundWorker的RunWorkerCompleted事件？我需要等到 DoSomethingElse(); 完成。

谢谢

Answer 1

处理BackgroundWorker.RunWorkerCompleted当后台操作完成、取消或引发异常时发生的事件。

// This event handler deals with the results of the
// background operation.

private void backgroundWorker1_RunWorkerCompleted(
    object sender, RunWorkerCompletedEventArgs e)
{
    // First, handle the case where an exception was thrown.
    if (e.Error != null)
    {
    }
    else if (e.Cancelled)
    {
        // Next, handle the case where the user canceled 
        // the operation.
        // Note that due to a race condition in 
        // the DoWork event handler, the Cancelled
        // flag may not have been set, even though
        // CancelAsync was called.
    }
    else
    {
        // Finally, handle the case where the operation 
        // succeeded.
    }

}