连续任务

using System;
using System.Text;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

namespace Test
{
    class Program
    {
        public static string DateTime_Now_ToString()
        {
            return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
        }


        /// <summary>
        /// 连续任务(对任务进行排序)
        /// </summary>
        static void Main()
        {
            Console.WriteLine("当前时间：{0}\n", DateTime_Now_ToString());


            //前置任务
            Task<int> task1 = new Task<int>(() =>
            {
                Console.WriteLine("task1任务开始," + DateTime.Now.ToString());

                Thread.Sleep(TimeSpan.FromMilliseconds(5000));

                int threadId = Thread.CurrentThread.ManagedThreadId;
                Console.WriteLine("task11内的线程Id：{0},{1}", threadId.ToString(), DateTime.Now.ToString());
                CurrentThreadInfo("task11");

                return threadId;
            });


            //后置任务(task1的后置任务)
            Task task1Continue = task1.ContinueWith(t1 =>
            {
                //Task.ContinueWith()方法新建一个连续任务,t1作为参数传递一个对前置任务(task1)的引用。
                Console.WriteLine("\ntask1Continue任务开始," + DateTime.Now.ToString());

                int threadId = Thread.CurrentThread.ManagedThreadId;
                Console.WriteLine("task1Continue内的线程Id：{0},{1}", threadId.ToString(), DateTime.Now.ToString());
                CurrentThreadInfo("task1Continue");

                Thread.Sleep(TimeSpan.FromMilliseconds(2000));
                Console.WriteLine("\n前置任务的结果:【{0}】,{1}", t1.Result.ToString(), DateTime.Now.ToString());
            });

            task1.Start();
            Task.WaitAll(task1, task1Continue);//等待两个任务完成


            Console.WriteLine("\n执行完成" + DateTime_Now_ToString());
            Console.ReadLine();
        }


        /// <summary>
        /// 当前线程信息
        /// </summary>
        private static void CurrentThreadInfo(string name)
        {
            StringBuilder builder = new StringBuilder();
            builder.AppendLine("");
            builder.AppendLine(String.Format("{0}线程Id:\t\t{1}", name, Thread.CurrentThread.ManagedThreadId));
            builder.AppendLine(String.Format("{0}是否使用线程池:\t{1}", name, Thread.CurrentThread.IsThreadPoolThread));
            builder.AppendLine(String.Format("{0}是否后台线程:\t{1}", name, Thread.CurrentThread.IsBackground));
            builder.AppendLine(String.Format("{0}线程状态:\t\t{1}", name, Thread.CurrentThread.ThreadState.ToString()));
            builder.AppendLine(String.Format("{0}当前时间:\t\t{1}", name, DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));
            builder.AppendLine("");

            Console.WriteLine(builder.ToString());
        }

    }
}

 

打印运行结果：

/*
当前时间：2016-09-01 10:32:10

task1任务开始,2016/9/1 10:32:10
task11内的线程Id：6,2016/9/1 10:32:15

task11线程Id:           6
task11是否使用线程池:    True
task11是否后台线程:      True
task11线程状态:         Background
task11当前时间:         2016-09-01 10:32:15



task1Continue任务开始,2016/9/1 10:32:15
task1Continue内的线程Id：11,2016/9/1 10:32:15

task1Continue线程Id:            11
task1Continue是否使用线程池:     True
task1Continue是否后台线程:       True
task1Continue线程状态:          Background
task1Continue当前时间:          2016-09-01 10:32:15



前置任务的结果:【6】,2016/9/1 10:32:17

执行完成2016-09-01 10:32:17
 
*/