C# 多线程

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;

namespace demo_1018
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(new ThreadStart(run));
            thread.Start();
        }
        public void run()
        {
            int sum = 0;
            for (int i = 0; i < 1000; i++)
            {
                sum = sum + i;
            }
            Console.WriteLine(sum);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(new ParameterizedThreadStart(run1));
            thread.Start("你好");
        }
        public void run1(object A)
        {
            string str = A as string;
            Console.WriteLine(str);

        }

        public delegate int Sum(int a, int b);
        private void button3_Click(object sender, EventArgs e)
        {
            Sum sum = new Sum(test);
            //int num = test(3, 5);
            //Console.WriteLine(num);
            int num = sum.Invoke(3, 5);
            Console.WriteLine(num);

        }
        public int test(int a, int b)
        {
            return a + b;
        }

        private void button4_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(test2);
            thread.Start();
        }
        public void test2()
        {
            textBox1.Invoke(new Action(() => { textBox1.Text = "123"; }));
        }

        public delegate void Operation();
        Operation operation;
        private void button5_Click(object sender, EventArgs e)
        {
            operation = test3;
            Thread thread = new Thread(run2);
            thread.Start();
        }
        public void run2()
        {
            // operation.Invoke();
            this.Invoke(operation);
        }
        public void test3()
        {
            textBox1.Text = "123";
        }

        //使用lamada表达式
        private void button6_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(() => { Console.WriteLine("HELLO WORLD"); });
            thread.Start();
        }

        private void button7_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(delegate () { Console.WriteLine("HELLO WORLD"); });
            thread.Start();
        }

        private void button8_Click(object sender, EventArgs e)
        {
            Thread thread = new Thread(() =>
            {
                Thread.Sleep(6000);
                Console.WriteLine("start a new thread");
            });
            thread.IsBackground = true;
            thread.Start();
            Console.WriteLine("main thread end");
        }

        private void button9_Click(object sender, EventArgs e)
        {
            BookShop bookShop = new BookShop();
            Thread thread = new Thread(bookShop.Sale);
            Thread thread1 = new Thread(bookShop.Sale);
            thread.Start();
            thread1.Start();

        }
        private delegate void setTextValueCallBack(int value);
        //声明回调
        private setTextValueCallBack setCallBack;
        private void button10_Click(object sender, EventArgs e)
        {
            setCallBack = SetValue;
            Thread thread = new Thread(run4);
            thread.IsBackground = true;
            thread.Start();
        }
        public void run4()
        {
            for (int i = 0; i < 10000; i++)
            {
                this.Invoke(setCallBack, i);
            }
        }
        public void SetValue(int value)
        {
            textBox1.Text = value.ToString();
        }

        //异步方法
        private void button11_Click(object sender, EventArgs e)
        {
            //是确认线程的唯一标识符
            Console.WriteLine($"***************btnAsync_Click Start {Thread.CurrentThread.ManagedThreadId}");
            //Action action = this.DoSomethingLong;
             调用委托(同步调用)
            //action.Invoke("btnAsync_Click_1");
             异步调用委托
            //action.BeginInvoke("btnAsync_Click_2", null, null);

            Action<string> action = this.DoSomethingLong;
            for (int i = 0; i < 5; i++)
            {
                //Thread.Sleep(5);
                string name = string.Format($"btnAsync_Click_{i}");
                action.BeginInvoke(name, null, null);
            }
            Console.WriteLine($"***************btnAsync_Click End    {Thread.CurrentThread.ManagedThreadId}");
        }

        //同步
        private void button12_Click(object sender, EventArgs e)
        {
            Console.WriteLine($"****************btnSync_Click Start {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");
            for (int i = 0; i < 5; i++)
            {
                string name = string.Format($"btnSync_Click_{i}");
                this.DoSomethingLong(name);
            }
        }

        private void DoSomethingLong(string name)
        {
            Console.WriteLine($"****************DoSomethingLong {name} Start {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");
            long lResult = 0;
            for (int i = 0; i < 1000000000; i++)
            {
                lResult += i;
            }
            Console.WriteLine($"****************DoSomethingLong {name}   End {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")} {lResult}***************");
        }

        // 需求：异步多线程执行完之后再打印出下面这句,下面代码没有实现该功能
        private void button13_Click(object sender, EventArgs e)
        {
            Console.WriteLine($"****************btnAsyncAdvanced_Click Start {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");
            Action<string> action = this.DoSomethingLong;
            action.BeginInvoke("btnAsyncAdvanced_Click", null, null);
            // 需求：异步多线程执行完之后再打印出下面这句
            Console.WriteLine($"到这里计算已经完成了。{Thread.CurrentThread.ManagedThreadId.ToString("00")}。");
            Console.WriteLine($"****************btnAsyncAdvanced_Click End {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");
        }

        private void button14_Click(object sender, EventArgs e)
        {
            Console.WriteLine($"****************btnAsyncAdvanced_Click Start {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");
            Action<string> action = this.DoSomethingLong;
            AsyncCallback asyncCallback = p => { Console.WriteLine($"到这里计算已经完成了。{Thread.CurrentThread.ManagedThreadId.ToString("00")}。"); };
            action.BeginInvoke("btnAsyncAdvanced_Click", asyncCallback, null);
            Console.WriteLine($"****************btnAsyncAdvanced_Click End {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");
        }

        private void button15_Click(object sender, EventArgs e)
        {

            // 需求：异步多线程执行完之后再打印出下面这句
            Console.WriteLine($"****************btnAsyncAdvanced_Click Start {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");
            Action<string> action = this.DoSomethingLong;
            IAsyncResult asyncResult = null;
            // 定义一个回调
            AsyncCallback callback = p =>
            {
                // 比较两个变量是否是同一个
                Console.WriteLine(object.ReferenceEquals(p, asyncResult));
                Console.WriteLine($"到这里计算已经完成了。{Thread.CurrentThread.ManagedThreadId.ToString("00")}。");
            };
            // 回调作为参数
            asyncResult = action.BeginInvoke("btnAsyncAdvanced_Click", callback, null);
            Console.WriteLine($"****************btnAsyncAdvanced_Click End {Thread.CurrentThread.ManagedThreadId.ToString("00")} {DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")}***************");

        }
        //上述结论： BeginInvoke的返回值就是callback委托的参数。




        private void button16_Click(object sender, EventArgs e)
        {
            Func<int> action = () =>
            {
                Thread.Sleep(2000);
                return DateTime.Now.Day;
            };
            //输出委托同步调用的返回值
            int num = action.Invoke();
            Console.WriteLine(num);
            //委托的异步调用
            IAsyncResult asyncResult = null;
            AsyncCallback asyncCallback = p => { Console.WriteLine(p.AsyncState); };
            asyncResult = action.BeginInvoke(asyncCallback, "异步调用返回值");

            //endinvoke
            int num1 = action.EndInvoke(asyncResult);
            Console.WriteLine(num1);
        }

    }

    public class BookShop
    {
        public int num = 1;
        public void Sale()
        {
            lock (this)
            {

                int tmp = num;
                if (tmp > 0)
                {
                    Thread.Sleep(1000);
                    num = num - 1;
                    Console.WriteLine("售出一本图书，还剩{0}本", num);
                }
                else
                {
                    Console.WriteLine("没有了");
                }

            }

        }
    }
}
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