C#多线程学习

   

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            TextBox.CheckForIllegalCrossThreadCalls = false;
        }
        //单线程和多线程
        void count()
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            for (int i = 0; i <900000000;i++)
            {

            }
            sw.Stop();
            MessageBox.Show(sw.ElapsedMilliseconds.ToString());//执行时间
        }
        //线程重入
        void add()
        {
            int num = 0;
            for (int i = 0; i < 1000; i++)
            {
               
                textBox1.Text = num.ToString();
                Console.WriteLine(Thread.CurrentThread.Name+"  num="+num);
                num++;
            }
        }
        //线程执行带参数的方法
        void show(object name)//object类型
        {
            MessageBox.Show("name="+name);
        }
        //线程执行带多个参数的方法
        void show2(object name)
        {
            List<string> list=name as List<string>;
            foreach(string li in list)
            {
                MessageBox.Show(li);
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            count();//单线程

 

        }

        private void button2_Click(object sender, EventArgs e)
        {
            Thread thread1 = new Thread(count);
            thread1.Start();//多线程
            thread1.IsBackground = true;//设为后台线程，主线程关闭后停止执行
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Thread thread1 = new Thread(add);
            thread1.Name ="t1";
            thread1.IsBackground = true;
            thread1.Start();

            Thread thread2 = new Thread(add);
            thread2.Name = "t2";
            thread2.IsBackground = true;
            thread2.Start();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            Thread thread1 = new Thread(show);
            thread1.IsBackground = true;
            thread1.Start("周杰伦");          
        }

        private void button5_Click(object sender, EventArgs e)
        {
            Thread thread1 = new Thread(show2);
            thread1.IsBackground = true;
            thread1.Start(new List<string> { "周杰伦", "刘德华" });
        }
    }