c# - 等待多个后台线程

Question

我想知道多线程程序中所有线程何时完成

没有像池这样的东西

while(!allThreadFinished){
thread.sleep(100);
}

该解决方案应该使用Monitor，但我不知道如何证明它是正确的。由于以下代码中的“SomeMethod”使用网络，因此会消耗时间。

public object SomeMethod(string input);
public object[] MultiThreadMethod(string[] inputs) {
            var result = new object[inputs.Count()];
            int i = 0;
            foreach (var item in inputs) {
                BackgroundWorker work = new BackgroundWorker();
                work.DoWork += (sender, doWorkEventArgs) => { doWorkEventArgs.Result = SomeMethod(item); };
                work.RunWorkerCompleted += (sender, runWorkerCompletedEventArgs) => { 
                    result[i] = runWorkerCompletedEventArgs.Result; 
                };
                i++;
                work.RunWorkerAsync();
            }
            /////////////////////////////////////////////////////////////
            //**wait while all thread has been completed**
            /////////////////////////////////////////////////////////////
            return result;
        }

Answer 1

尝试使用 TPL http://msdn.microsoft.com/en-us/library/dd460717.aspx .

 List<Task> tasks = new List<Task>();

 Task t1 = new Task(() =>
 {
    // Do something here...

 });
 t1.Start();
 tasks.Add(t1);

 Task t2 = new Task(() =>
 {
    // Do something here...

 });
 t2.Start();
 tasks.Add(t2);

 Task.WaitAll(tasks.ToArray());