取消后台工作程序时,在DoWork方法中,CancellationPending属性为true,但在RunWorkerCompleted方法中,CancellationPending属性为false。我不知道我做错了什么?
static BackgroundWorker b1;
static void Main(string[] args)
{
b1=new BackgroundWorker();
b1.DoWork += new DoWorkEventHandler(work1);
b1.RunWorkerCompleted += new RunWorkerCompletedEventHandler(completed);
b1.WorkerSupportsCancellation = true;
b1.RunWorkerAsync("Hellow");
Console.ReadLine();
}
private static void completed(object sender, RunWorkerCompletedEventArgs e)
{
if (((BackgroundWorker)sender).CancellationPending)
Console.WriteLine("Canceled!");
else
Console.WriteLine("Result:" + e.Result);//it goes here every time
}
private static void work1(object sender, DoWorkEventArgs e)
{
((BackgroundWorker)sender).CancelAsync();
if (((BackgroundWorker)sender).CancellationPending)
{
e.Cancel = true;
}
}
顺便问一下,我如何将DoWork中发生的错误添加到RunWorkerCompletedEventArgs.Error中,以便向用户显示?
`if(worker.CancellationPending){dwea.Cancel = true; return;}`
- Jesse Adam