80 lines
3.4 KiB
C#
80 lines
3.4 KiB
C#
using System;
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using System.Threading;
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using System.Threading.Tasks;
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namespace ConsoleApp2
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{
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class Program
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{
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static void Main(string[] args)
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{
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Console.WriteLine("我是主线程，线程ID：" + Thread.CurrentThread.ManagedThreadId);
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////task用法一
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//Task task1 = new Task(() => MyAction());//异步调用任务
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//task1.Start();
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//Console.WriteLine("***");
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////task用法二
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//var strRes = Task.Run<string>(() => { return GetReturnStr(); });//同步等待返回值
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//Console.WriteLine(strRes.Result);
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//task->async异步方法和await，主线程碰到await时会立即返回，继续以非阻塞形式执行主线程下面的逻辑
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Console.WriteLine("---------------------------------");
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Console.WriteLine("①我是主线程，线程ID：{0}", Thread.CurrentThread.ManagedThreadId);
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var testResult = TestAsync();
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Console.WriteLine("@@@@@@@@@@");
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//Console.WriteLine("Main_1:{0}", Thread.CurrentThread.ManagedThreadId);
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//A();
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//Console.WriteLine("Main_2{0}", Thread.CurrentThread.ManagedThreadId);
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Console.ReadKey();
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}
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static async Task A()
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{
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Console.WriteLine("1线程ID：{0}", Thread.CurrentThread.ManagedThreadId);
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B();
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Console.WriteLine("1线程ID：{0}", Thread.CurrentThread.ManagedThreadId);
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}
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static async Task B()
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{
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Thread.Sleep(1000);
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Console.WriteLine("2线程ID：{0}", Thread.CurrentThread.ManagedThreadId);
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}
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static async Task TestAsync()
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{
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Console.WriteLine("②调用GetReturnResult()之前，线程ID：{0}。当前时间：{1}", Thread.CurrentThread.ManagedThreadId, DateTime.Now.ToString("yyyy-MM-dd hh:MM:ss"));
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var name = GetReturnResult();
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Console.WriteLine("④调用GetReturnResult()之后，线程ID：{0}。当前时间：{1}", Thread.CurrentThread.ManagedThreadId, DateTime.Now.ToString("yyyy-MM-dd hh:MM:ss"));
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Console.WriteLine("⑥得到GetReturnResult()方法的结果一：{0}。当前时间：{1}", await name, DateTime.Now.ToString("yyyy-MM-dd hh:MM:ss"));
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Console.WriteLine("⑥得到GetReturnResult()方法的结果二：{0}。当前时间：{1}", name.GetAwaiter().GetResult(), DateTime.Now.ToString("yyyy-MM-dd hh:MM:ss"));
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}
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static async Task<string> GetReturnResult()
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{
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Thread.Sleep(2000);
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Console.WriteLine("③执行Task.Run之前, 线程ID：{0}", Thread.CurrentThread.ManagedThreadId);
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return await Task.Run(() =>
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{
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Thread.Sleep(2000);
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Console.WriteLine("⑤GetReturnResult()方法里面线程ID: {0}", Thread.CurrentThread.ManagedThreadId);
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return "我是返回值";
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});
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}
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static void MyAction()
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{
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Console.WriteLine("1我是新进程，线程ID：" + Thread.CurrentThread.ManagedThreadId);
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Thread.Sleep(2000);
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Console.WriteLine("2我是新进程，线程ID：" + Thread.CurrentThread.ManagedThreadId);
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}
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static string GetReturnStr()
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{
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Thread.Sleep(2000);
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return "我是返回值，线程ID：" + Thread.CurrentThread.ManagedThreadId;
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}
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}
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}
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