.net多线程 Task

1.基本用法

 //Task.Run(() => this.DoSomethingLong("btnTask_Click1"));
            //Task.Run(() => this.DoSomethingLong("btnTask_Click2"));
            //TaskFactory taskFactory = Task.Factory;//4.0
            //taskFactory.StartNew(() => this.DoSomethingLong("btnTask_Click3"));
            //new Task(() => this.DoSomethingLong("btnTask_Click4")).Start();

2.线程等待,task.WaitAll

////什么时候用多线程？ 任务能并发运行；提升速度；优化体验
                List<Task> taskList = new List<Task>();
                Console.WriteLine($"项目经理启动一个项目。。【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");
                Console.WriteLine($"前置的准备工作。。。【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");
                Console.WriteLine($"开始编程。。。【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");
                taskList.Add(Task.Run(() => this.Coding("爱书客", "Client")));//task--hash--
                taskList.Add(Task.Run(() => this.Coding("风动寂野", "Portal")));
                taskList.Add(Task.Run(() => this.Coding("笑看风云", "Service")));
                //做个子类 子类里面包含了一个属性  绿叶种子写个例子
                taskList.Add(Task.Run(() => this.Coding("Jack", "Jump")));
                taskList.Add(Task.Run(() => this.Coding("胡萝卜", "Monitor")));
                Task.WaitAll(taskList.ToArray());

 3.等限定的时间,然后继续 

  ////Task.WaitAll(taskList.ToArray(), 1000);//限时等待

4.等待某一个

   //////阻塞：需要完成后再继续
                //Task.WaitAny(taskList.ToArray());//会阻塞当前线程，等着某个任务完成后，才进入下一行  卡界面
                ////Task.WaitAny(taskList.ToArray(), 1000);
                //Console.WriteLine($"完成里程碑 【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");

5.不卡主线程等待 WhenAll WhenAny

 //taskList.Add(Task.WhenAny(taskList.ToArray()).ContinueWith(t =>
                //{
                //    Console.WriteLine(taskList.ToArray().FirstOrDefault(s => s.Status == TaskStatus.RanToCompletion));
                //    Console.WriteLine($"得意的笑。。。【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");
                //}));

                //taskList.Add(Task.WhenAll(taskList.ToArray()).ContinueWith(t =>
                //{
                //    Console.WriteLine($"部署环境，联调测试。。。【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");
                //}));

6.上述taskFactory 写法

                ////TaskFactory taskFactory = new TaskFactory();
                ////taskFactory.ContinueWhenAll(taskList.ToArray(), tList =>
                ////{
                ////    Console.WriteLine($"部署环境，联调测试。。。【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");
                ////});

                ////taskFactory.ContinueWhenAny(taskList.ToArray(), t =>
                ////{
                ////    Console.WriteLine($"部署环境，联调测试。。。【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");
                ////});

7.查看是哪个线程先完成任务的,taskFactory.StartNew的重载方法,可以拿到自定义的标识

 //TaskFactory taskFactory = new TaskFactory();
                //List<Task> taskList = new List<Task>();
                //taskList.Add(taskFactory.StartNew(o => this.Coding("爱书客", "Client"), "爱书客"));
                //taskList.Add(taskFactory.StartNew(o => this.Coding("风动寂野", "Portal"), "风动寂野"));
                //taskList.Add(taskFactory.StartNew(o => this.Coding("笑看风云", "Service"), "笑看风云"));
                //taskFactory.ContinueWhenAny(taskList.ToArray(), t =>
                //{
                //Console.WriteLine(t.AsyncState);
                //Console.WriteLine($"部署环境，联调测试。。。【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");
                //});
                //taskFactory.ContinueWhenAll(taskList.ToArray(), tList =>
                //{
                //Console.WriteLine(tList[0].AsyncState);
                //Console.WriteLine($"部署环境，联调测试。。。【{Thread.CurrentThread.ManagedThreadId.ToString("00")}】");
                //});

 8.回调 

Task.Run(() => this.Coding("爱书客", "Client")).ContinueWith(t => { });

9.延迟和等待,卡界面 和不卡界面

 //{
            //    //Task.Delay(1000);//延迟  不会卡
            //    //Thread.Sleep(1000);//等待   卡

            //    Stopwatch stopwatch = new Stopwatch();
            //    stopwatch.Start();
            //    Thread.Sleep(2000);
            //    stopwatch.Stop();
            //    Console.WriteLine(stopwatch.ElapsedMilliseconds);
            //}
            {
                //Stopwatch stopwatch = new Stopwatch();
                //stopwatch.Start();
                //Task.Delay(2000).ContinueWith(t =>
                //{
                //    stopwatch.Stop();
                //    Console.WriteLine(stopwatch.ElapsedMilliseconds);
                //});
            }

 10.最多启动11条线程去完成任务(控制线程最大数量)

//{
            //    List<int> list = new List<int>();
            //    for (int i = 0; i < 10000; i++)
            //    {
            //        list.Add(i);
            //    }
            //    //完成10000个任务  但是只要11个线程  
            //    Action<int> action = i =>
            //    {
            //        Console.WriteLine(Thread.CurrentThread.ManagedThreadId.ToString("00"));
            //        Thread.Sleep(new Random(i).Next(100, 300));
            //    };
            //    List<Task> taskList = new List<Task>();
            //    foreach (var i in list)
            //    {
            //        int k = i;
            //        taskList.Add(Task.Run(() => action.Invoke(k)));
            //        if (taskList.Count > 10)
            //        {
            //            Task.WaitAny(taskList.ToArray());
            //            taskList = taskList.Where(t => t.Status != TaskStatus.RanToCompletion).ToList();
            //        }
            //    }
            //    Task.WhenAll(taskList.ToArray());
            //}