wpf - 检查多个BackgroundWorker的进度

Question

所以我使用循环创建多个BackgroundWorkers:

  foreach (var item in list)
  {
    worker = new BackgroundWorker();
    worker.DoWork += worker_DoWork;
    worker.RunWorkerAsync(item);
  }

现在我只是不知道如何检查所有这些 worker 是否完成了工作？

谢谢。

Answer 1

您可以保留一个活跃工作人员列表，并让每个工作人员在完成后自行删除:

List<BackgroundWorker> workers = new List<BackgroundWorker>();

...

  foreach (var item in list)
  {
    worker = new BackgroundWorker();
    worker.DoWork += worker_DoWork;
    workers.Add(worker);
    worker.RunWorkerCompleted += delegate(object s, RunWorkerCompletedEventArgs args)
    {
        BackgroundWorker worker = (BackgroundWorker)s;
        workers.Remove(worker);
    }
    worker.RunWorkerAsync(item);
  }

...

public bool IsWorkDone
{
    get { return workers.Count == 0; }
}

如果您不想池化 IsWorkDone，则可以在 workers.Remove(worker) 后(如果列表为空)引发一个事件...