多线程编程入门Thread_Task_async_await简单秒懂

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace 多线程编程入门Thread_Task_async_await简单秒懂

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

    /// <summary>
    /// 单线程做菜(会卡界面,窗口不能拖动,其他按钮不能点击,因为这里用的主线程就是UI线程)
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnSingleThread_Click(object sender, EventArgs e)
    {
        Thread.Sleep(3000);
        MessageBox.Show("素材做好了", "友情提示");
        Thread.Sleep(5000);
        MessageBox.Show("荤菜做好了", "友情提示");
    }

    /// <summary>
    /// Thread创建线程(开了新线程不会卡界面了)
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnThread_Click(object sender, EventArgs e)
    {
        Thread t1 = new Thread(_ =>
        {
            Thread.Sleep(3000);
            MessageBox.Show("素材做好了", "友情提示");
            Thread.Sleep(5000);
            MessageBox.Show("荤菜做好了", "友情提示");
        });

        t1.Start();
    }

    /// <summary>
    /// Task创建线程(推荐这种方式创建线程,性能会更好,管理会更方便)
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnTask_Click(object sender, EventArgs e)
    {
        Task.Run(() =>
        {
            Thread.Sleep(3000);
            MessageBox.Show("素材做好了", "友情提示");
            Thread.Sleep(5000);
            MessageBox.Show("荤菜做好了", "友情提示");
        });
    }

    /// <summary>
    /// 两个线程同时处理(两个任务并行运行,好处是利用cpu的多核,每个核心做一个事情,可以大大提高效率)
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnWith_Click(object sender, EventArgs e)
    {
        Task.Run(() =>
        {
            Thread.Sleep(3000);
            MessageBox.Show("素材做好了", "友情提示");
        });

        Task.Run(() =>
        {
            Thread.Sleep(5000);
            MessageBox.Show("荤菜做好了", "友情提示");
        });
    }

    /// <summary>
    /// 无顺序执行,这里会先执行主线程的"菜都做好了,大家快来吃饭!"
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnNon_Click(object sender, EventArgs e)
    {
        Task.Run(() =>
        {
            Thread.Sleep(3000);
            MessageBox.Show("素材做好了", "友情提示");
        });

        Task.Run(() =>
        {
            Thread.Sleep(5000);
            MessageBox.Show("荤菜做好了", "友情提示");
        });

        MessageBox.Show("菜都做好了,大家快来吃饭!", "提示");
    }

    /// <summary>
    /// 异步,有顺序的执行,等待一个线程执行完了,才能继续往下面执行
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private async void btnNext_Click(object sender, EventArgs e)
    {
        await Task.Run(() =>
        {
            Thread.Sleep(3000);
            MessageBox.Show("素材做好了", "友情提示");
        });

        await Task.Run(() =>
        {
            Thread.Sleep(5000);
            MessageBox.Show("荤菜做好了", "友情提示");
        });

        MessageBox.Show("菜都做好了,大家快来吃饭!", "提示");

    }

    /// <summary>
    /// 两个线程并行处理完后再执行
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void btnTongshi_Click(object sender, EventArgs e)
    {

        List<Task> ts = new List<Task>();

        ts.Add(Task.Run(() =>
        {
            Thread.Sleep(3000);
            MessageBox.Show("素材做好了", "友情提示");
        }));

        ts.Add(Task.Run(() =>
        {
            Thread.Sleep(5000);
            MessageBox.Show("荤菜做好了", "友情提示");
        }));

        //等待所有任务都执行完成后,再来做另外的事情
        Task.WhenAll(ts).ContinueWith(t =>  //t:是前一个任务里面的信息,也就是说后续的任务可以得到前一个任务里的信息
        {
            MessageBox.Show("菜都做好了,大家快来吃饭!", "提示");
        });

    }
}

}

`