C#同步异步运用方法（笔记19讲）

*需要引用的名称空间：
using System.Threading;

以下方法谁不都等谁，会发生资源争抢

异步操作（同时运行）

class Program
    {
        static void Main(string[] args)
        {
            Student stu1 = new Student(){ ID=1, PenColor = ConsoleColor.Red };

            Student stu2 = new Student() { ID = 1, PenColor = ConsoleColor.Blue };
            Student stu3 = new Student() { ID = 1, PenColor = ConsoleColor.Yellow };
            Action action1 = new Action(stu1.DoHomework);
            Action action2 = new Action(stu2.DoHomework);
            Action action3 = new Action(stu3.DoHomework);

            action1.BeginInvoke(null,null);
            action2.BeginInvoke(null, null);
            action3.BeginInvoke(null, null);

            for (int i = 0; i < 3; i++)
            {
                Console.BackgroundColor = ConsoleColor.Yellow;
                Console.WriteLine(i);
                Thread.Sleep(1000);
            }
            
        }
    }
    class Student
    {
        public int ID { get; set; }
        public ConsoleColor PenColor { get; set; }
         public void DoHomework()
        {
            for (int i = 0; i < 5; i++)
            {
                Console.ForegroundColor = this.PenColor;
                Console.WriteLine("Stusent:{0} doinhomework:{1}", this.ID, i);
                Thread.Sleep(1000);
            }
        }

    }

显式异步调用（古老级）

使用：Thread thread1 = new Thread(new ThreadStart(action1))

class Program
    {
        static void Main(string[] args)
        {
            Student stu1 = new Student(){ ID=1, PenColor = ConsoleColor.Red };
            Student stu2 = new Student() { ID = 1, PenColor = ConsoleColor.Blue };
            Student stu3 = new Student() { ID = 1, PenColor = ConsoleColor.Yellow };

            Action action1 = new Action(stu1.DoHomework);
            Action action2 = new Action(stu2.DoHomework);
            Action action3 = new Action(stu3.DoHomework);

            Thread thread1 = new Thread(new ThreadStart(action1));
            Thread thread2 = new Thread(new ThreadStart(action2));
            Thread thread3 = new Thread(new ThreadStart(action3));
            
            thread1.Start();
            thread2.Start();
            thread3.Start();
            for (int i = 0; i < 3; i++)
            {
                Console.BackgroundColor = ConsoleColor.Yellow;
                Console.WriteLine(i);
                Thread.Sleep(1000);
            }
            
        }
    }
    class Student
    {
        public int ID { get; set; }
        public ConsoleColor PenColor { get; set; }
         public void DoHomework()
        {
            for (int i = 0; i < 5; i++)
            {
                Console.ForegroundColor = this.PenColor;
                Console.WriteLine("Stusent:{0} doinhomework:{1}", this.ID, i);
                Thread.Sleep(1000);
            }
        }

    }

使用C#自带的Task

需要引用的名称空间：
using System.Threading.Tasks;

使用方法：Task task1 = new Task(new Action(stu1.DoHomework));

class Program
    {
        static void Main(string[] args)
        {
            Student stu1 = new Student(){ ID=1, PenColor = ConsoleColor.Red };
            Student stu2 = new Student() { ID = 1, PenColor = ConsoleColor.Blue };
            Student stu3 = new Student() { ID = 1, PenColor = ConsoleColor.Yellow };

            Task task1 = new Task(new Action(stu1.DoHomework));
            Task task2 = new Task(new Action(stu2.DoHomework));
            Task task3 = new Task(new Action(stu3.DoHomework));
            
            task1.Start();
            task2.Start();
            task3.Start();
            
            for (int i = 0; i < 3; i++)
            {
                Console.BackgroundColor = ConsoleColor.Yellow;
                Console.WriteLine(i);
                Thread.Sleep(1000);
            }
        }
    }
    class Student
    {
        public int ID { get; set; }
        public ConsoleColor PenColor { get; set; }
         public void DoHomework()
        {
            for (int i = 0; i < 5; i++)
            {
                Console.ForegroundColor = this.PenColor;
                Console.WriteLine("Stusent:{0} doinhomework:{1}", this.ID, i);
                Thread.Sleep(1000);
            }
        }

    }