C#使用Task實(shí)現(xiàn)并行編程

更新時(shí)間：2022年08月27日 15:10:40 作者：taadis

這篇文章介紹了C#使用Task實(shí)現(xiàn)并行編程的方法，文中通過(guò)示例代碼介紹的非常詳細(xì)。對(duì)大家的學(xué)習(xí)或工作具有一定的參考借鑒價(jià)值，需要的朋友可以參考下

故事背景

透著紗的窗外的陽(yáng)光, 又是一個(gè)星期一.

慢慢來(lái)

一看時(shí)間, 還早, 那么蹦跶起來(lái)

穿衣
刷牙
洗臉

用代碼來(lái)說(shuō)的話, 應(yīng)該是這樣:

// Program.cs
using System;
using System.Diagnostics;
using System.Threading;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("早起三件事開(kāi)始...");
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Dress();
            BrushTeeth();
            WashFace();
            sw.Stop();
            Console.WriteLine($"...早起三件事完成, 總耗時(shí) {sw.Elapsed.Seconds} 秒");
            Console.ReadKey();
        }

        /// <summary>
        /// 穿衣
        /// </summary>
        static void Dress()
        {
            Console.WriteLine($"穿衣開(kāi)始...");
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Thread.Sleep(timeout: TimeSpan.FromSeconds(value: 1));
            sw.Stop();
            Console.WriteLine($"...穿衣完成, 耗時(shí) {sw.Elapsed.Seconds} 秒");
        }

        /// <summary>
        /// 刷牙
        /// </summary>
        static void BrushTeeth()
        {
            Console.WriteLine($"刷牙開(kāi)始...");
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Thread.Sleep(timeout: TimeSpan.FromSeconds(value: 3));
            sw.Stop();
            Console.WriteLine($"...刷牙完成, 耗時(shí) {sw.Elapsed.Seconds} 秒");
        }

        /// <summary>
        /// 洗臉
        /// </summary>
        static void WashFace()
        {
            Console.WriteLine($"洗臉開(kāi)始...");
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Thread.Sleep(timeout: TimeSpan.FromSeconds(value: 5));
            sw.Stop();
            Console.WriteLine($"...系列完成, 耗時(shí) {sw.Elapsed.Seconds} 秒");
        }
    }
}

運(yùn)行之后, 等待一會(huì), 會(huì)看到如下輸出:

早起三件事開(kāi)始...
穿衣開(kāi)始...
...穿衣完成, 耗時(shí) 1 秒
刷牙開(kāi)始...
...刷牙完成, 耗時(shí) 3 秒
洗臉開(kāi)始...
...系列完成, 耗時(shí) 5 秒
...早起三件事完成, 總耗時(shí) 9 秒

一件一件事慢慢來(lái), 總耗時(shí) 9 秒...

趕時(shí)間

一看時(shí)間, 哎呦我去, 快遲到了, 穿衣 & 刷牙 & 洗臉一起來(lái)吧...別問(wèn)我現(xiàn)實(shí)中怎么實(shí)現(xiàn)的

總而言之代碼是這樣滴:

// Program.cs
using System;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("早起三件事開(kāi)始...");
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Task dressTask = Task.Factory.StartNew(action: Dress);
            Task brushTeethTask = Task.Factory.StartNew(action: BrushTeeth);
            Task washFaceTask = Task.Factory.StartNew(action: WashFace);
            Task.WaitAll(dressTask, brushTeethTask, washFaceTask);
            sw.Stop();
            Console.WriteLine($"...早起三件事完成, 總耗時(shí) {sw.Elapsed.Seconds} 秒");
            Console.ReadKey();
        }

        /// <summary>
        /// 穿衣
        /// </summary>
        static void Dress()
        {
            Console.WriteLine($"穿衣開(kāi)始...");
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Thread.Sleep(timeout: TimeSpan.FromSeconds(value: 1));
            sw.Stop();
            Console.WriteLine($"...穿衣完成, 耗時(shí) {sw.Elapsed.Seconds} 秒");
        }

        /// <summary>
        /// 刷牙
        /// </summary>
        static void BrushTeeth()
        {
            Console.WriteLine($"刷牙開(kāi)始...");
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Thread.Sleep(timeout: TimeSpan.FromSeconds(value: 3));
            sw.Stop();
            Console.WriteLine($"...刷牙完成, 耗時(shí) {sw.Elapsed.Seconds} 秒");
        }

        /// <summary>
        /// 洗臉
        /// </summary>
        static void WashFace()
        {
            Console.WriteLine($"洗臉開(kāi)始...");
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Thread.Sleep(timeout: TimeSpan.FromSeconds(value: 5));
            sw.Stop();
            Console.WriteLine($"...系列完成, 耗時(shí) {sw.Elapsed.Seconds} 秒");
        }
    }
}

啟動(dòng)運(yùn)行之后, 等待一會(huì), 你應(yīng)該會(huì)看到如下輸出: