异步-学习笔记3 Task

1. 通过Task启动多线程

2. 解决多线程的几大应用场景

  private void btnTask_Click(object sender, EventArgs e)
        {
            Console.WriteLine("************************btnTask_Click Begin*************************");
            Console.WriteLine("Eleven老师接到私单项目");
            Console.WriteLine("沟通需求，确认需求，谈价格");
            Console.WriteLine("签合同，受50%的首期费用");
            Console.WriteLine("老师筛选学员，组建团队");
            Console.WriteLine("完成初步设计，系统分工");
            Console.WriteLine("老师干活.....");
  
            TaskFactory factory = new TaskFactory(); //创建一个Task工厂
            List<Task> tasklist = new List<Task>();
            tasklist.Add(factory.StartNew(                                      //匿名函数
                delegate ()
                {
                    this.coding("PoPo", "WCF");
                }
                ));
            tasklist.Add(factory.StartNew(() => this.coding("YoYo", "Portal")));
            tasklist.Add(factory.StartNew(() => this.coding("DoDo", "Client")));
            tasklist.Add(factory.StartNew(() => this.coding("WoWo", "WechatClient")));
            tasklist.Add(factory.StartNew(() => this.coding("ToTo", "EAServer")));

            //ContinueWhenAny会开一个新的子线程
            //ContinueWhenAll会开一个新的子线程
            tasklist.Add(factory.ContinueWhenAny(tasklist.ToArray(), t => Console.WriteLine("获得大红包 id={0}", Thread.CurrentThread.ManagedThreadId)));
            tasklist.Add(factory.ContinueWhenAll(tasklist.ToArray(), tlist => Console.WriteLine("开始联调、部署、测试、验收 {0}", Thread.CurrentThread.ManagedThreadId)));

            //某个模块完成后收取20%
            Task.WaitAny(tasklist.ToArray()); //任一子线程结束；卡住当前线程，让程序完成等待
            Console.WriteLine("某个模块完成后， 收取剩下的20%");

            //开发完成后收钱
            Task.WaitAll(tasklist.ToArray());  //等待所有子线程结束；卡住当前线程，让程序完成等待
            Console.WriteLine("收取剩下的30%");
            Console.WriteLine("************************btnTask_Click end*************************");
        }
        private void coding(string username,string projectname)
        {
            Console.WriteLine("{0}   {1}  start coding {2}，线程id={3}", DateTime.Now.ToString("yyyy-MM-dd-hh-mm-ss.fff"), username, projectname,Thread.CurrentThread.ManagedThreadId);
            int icount = 0;
            for (int i = 0; i < 1000000000; i++)
            {
                icount = i;
            }
            Console.WriteLine("{0}   {1}  end coding {2}，线程id={3}", DateTime.Now.ToString("yyyy-MM-dd-hh-mm-ss.fff"), username, projectname, Thread.CurrentThread.ManagedThreadId);
        }

  运行结果