.NET Core 的异步编程-只讲干货（async,await,Task）

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(ThreadID() + " =》主线程启动");
            MethodAsync();//调用异步方法
            Console.WriteLine(ThreadID() + " =》主线程继续执行");
            Console.WriteLine(ThreadID() + " =》主线程结束 END");

            Console.Read();
        }
        static async void MethodAsync()
        {
            Console.WriteLine(ThreadID() + " =》MethodAsync方法开始执行");
            string str = await DoSomething();//等待GetString执行完成 
            Console.WriteLine(ThreadID() + " =》MethodAsync方法执行结束");
        }
        static Task<string> DoSomething()
        {
            Console.WriteLine(ThreadID() + " =》DoSomething方法开始执行");
            return Task<string>.Run(() =>
            {
                Thread.Sleep(4000);//导步线程  处理耗时任务 
                Console.WriteLine(ThreadID() + " =》DoSomething方法结束执行");
                return "GetString的返回值";
            });
        }
        static string ThreadID()
        {
            return Thread.CurrentThread.ManagedThreadId.ToString();
        }
    }
}

　　

1 =》主线程启动
1 =》MethodAsync方法开始执行
1 =》DoSomething方法开始执行
1 =》主线程继续执行
1 =》主线程结束 END
7 =》DoSomething方法结束执行

 

 

public class AsyncAwaitTest
{
    public void Start()
    {
        Console.WriteLine($"aaa,线程Id:{Thread.CurrentThread.ManagedThreadId}");
        AsyncMethod();
        Console.WriteLine($"eee,线程Id:{Thread.CurrentThread.ManagedThreadId}");
        Console.ReadLine();
    }
    public async Task<bool> AsyncMethod()
    {
        Console.WriteLine($"bbb,线程Id:{Thread.CurrentThread.ManagedThreadId}");
        await Task.Run(() => {

            Thread.Sleep(500);
            Console.WriteLine($"ccc,线程Id:{Thread.CurrentThread.ManagedThreadId}");
        });
        Console.WriteLine($"ddd,线程Id:{Thread.CurrentThread.ManagedThreadId}");
        return true;
    }
}

 

aaa,线程Id:1
bbb,线程Id:1
eee,线程Id:1
ccc,线程Id:7
ddd,线程Id:7

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