使用了await操作符获取异步任务结果

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

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


        /// <summary>
        /// 使用await操作符获取异步任务结果
        /// </summary>
        static void Main()
        {
            CurrentThreadInfo("主线程Main()的");


            Task t1 = TaskMethod_TPL();
            t1.Wait();

            Task t2 = TaskMethod_Await();
            t2.Wait();


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


        /// <summary>
        /// 启动一个任务
        /// </summary>        
        private static Task TaskMethod_TPL()
        {
            Task<string> task1 = GetCurrentThreadInfoAsync("task11");

            Task task2 = task1.ContinueWith(t1 =>
            {
                Console.WriteLine("返回task1任务的结果," + DateTime_Now_ToString());
                Console.WriteLine(t1.Result);
            }, TaskContinuationOptions.NotOnFaulted);

            Task task3 = task1.ContinueWith(t1 => Console.WriteLine("task1异常信息：" + t1.Exception.InnerException.Message), TaskContinuationOptions.OnlyOnFaulted);

            return Task.WhenAny(task2, task3);
        }

        /// <summary>
        /// 创建一个任务
        /// </summary>
        private async static Task TaskMethod_Await()
        {
            try
            {
                string result = await GetCurrentThreadInfoAsync("taskAwait");
                Console.WriteLine(result);
            }
            catch (Exception e)
            {
                Console.WriteLine("异常信息：" + e.Message);
            }
        }

        private async static Task<string> GetCurrentThreadInfoAsync(string name)
        {
            await Task.Delay(TimeSpan.FromMilliseconds(5000));

            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("");

            return builder.ToString();
        }


        /// <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：

/*

主线程Main()的线程Id:           9
主线程Main()的是否使用线程池:    False
主线程Main()的是否后台线程:      False
主线程Main()的线程状态:         Running
主线程Main()的当前时间:         2016-08-29 20:43:51


返回task1任务的结果,2016-08-29 20:43:56

task11线程Id:           11
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:         2016-08-29 20:43:56


taskAwait线程Id:                12
taskAwait是否使用线程池:         True
taskAwait是否后台线程:           True
taskAwait线程状态:              Background
taskAwait当前时间:              2016-08-29 20:44:01


执行完成2016-08-29 20:44:01

*/