c# 關於Task類處理多線程的學習

1.定義一個線程

 var task1 = Task.Factory.StartNew(() => DoSomeWork())；

方法如下：

View Code

        private static object DoSomeWork()
        {
            Console.WriteLine("nihao ");
            System.Threading.Thread.Sleep(3000);
            Console.Write("nihao ");
return "xiexie";
        }

2.多線程執行後，執行另一個方法

  var task1 = Task.Factory.StartNew(() => DoSomeWork()).ContinueWith(
                 task => { Console.WriteLine(task.Result.ToString()); }).ContinueWith(
                 task => { Console.WriteLine(task.Result.ToString()); });

3.等待所有線程結束

var task1 = Task.Factory.StartNew(() => DoSomeWork()); var task2 = Task.Factory.StartNew(() => DoSomeWork()); var task3 = Task.Factory.StartNew(() => DoSomeWork()); Task.WaitAll(task1, task2, task3);4.等待其中一個線程結束 var task1 = Task.Factory.StartNew(() => DoSomeWork()); var task2 = Task.Factory.StartNew(() => DoSomeWork()); var task3 = Task.Factory.StartNew(() => DoSomeWork()); Task.WaitAny(task1, task2, task3);5.等待所有線程結束執行的方法 var task1 = Task.Factory.StartNew(() => {      Thread.Sleep(3000);      return "dummy value 1" ; });  var task2 = Task.Factory.StartNew(() => {      Thread.Sleep(3000);      return "dummy value 2" ; });  var task3 = Task.Factory.StartNew(() => {      Thread.Sleep(3000);      return "dummy value 3" ; });  Task.Factory.ContinueWhenAll( new [] { task1, task2, task3 }, tasks => {      foreach (Task< string > task in tasks)      {          Console.WriteLine(task.Result);      } });