C# 多线程 简单使用方法以及常用参数

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; //线程操作的类在这个命名空间下.namespace C02多线程{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();            //关闭控件的跨线程访问检查             TextBox.CheckForIllegalCrossThreadCalls = false;        }        PRivate void button1_Click(object sender, EventArgs e)        {            int sum = 0;            for (int i = 0; i < 999999999; i++)            {                sum += i;            }            MessageBox.Show("ok");        }        private void button2_Click(object sender, EventArgs e)        {            //创建1个线程对象 并为这个线程对象指定要执行的方法.            Thread thread = new Thread(TestThread);            //设置线程为后台线程.            thread.IsBackground = true;            //开启线程            thread.Start();            //线程默认情况下都是前台线程.            //要所有的前台线程退出以后 程序才会退出.            //后台线程 只要所有的前台线程结束 后台线程就会立即结束.            //进程里默认的线程我们叫做主线程或者叫做UI线程.             //线程什么时候结束 该线程执行的方法执行完以后  线程就自动退出.            //多个线程访问同一资源  可能造成不同步的情况. 这个叫做 线程重入.            //th.Abort(); 强行停止线程.            //Thread.Sleep(1000);//将当前线程暂停 单位毫秒            //Thread.CurrentThread;得到当前线程的引用            //线程调用带参数的方法             //创建1个ParameterizedThreadStart委托对象.为这个委托对象绑定方法.            //将委托对象通过构造函数传入线程对象            //启动线程的时候调用Start()的重载 将参数传入.        }        //准备让线程去调用.        private void TestThread()        {            int sum = 0;            for (int i = 0; i < 999999999; i++)            {                sum += i;            }            MessageBox.Show("ok");        }        private void CountNunm()        {            //使用lock加锁  请联想你上厕所的情况            lock (this)            {                for (int i = 0; i < 10000; i++)                {                    int num = int.Parse(textBox1.Text.Trim());                    num++;                    //Thread.Sleep(500);//将当前线程暂停                   // Thread.CurrentThread.Abort();                    //Thread th = Thread.CurrentThread;                    //th.Abort();                    //if (num == 5000)                    //{                    //    th.Abort();                    //}                    textBox1.Text = num.ToString();                }            }        }        Thread th;        private void button3_Click(object sender, EventArgs e)        {            th = new Thread(CountNunm);            th.Name = "哈哈线程";            th.IsBackground = true;            th.Start();            //Thread th1 = new Thread(CountNunm);            //th1.IsBackground = true;            //th1.Start();        }        private void button4_Click(object sender, EventArgs e)        {            //ThreadStart s = new ThreadStart(CountNunm);             //Thread th = new Thread(CountNunm);             ParameterizedThreadStart s = new ParameterizedThreadStart(TestThreadParsms);            Thread t = new Thread(s);            t.IsBackground = true;            t.Start("你好啊");           }        private void TestThreadParsms(object obj)        {            Console.WriteLine(obj.ToString());        }    }}