利用多线程模拟一个电脑摇奖程序，如图所示。在点击【滚动号码】，启动线程，对后台的电话号码进行循环显示；点击【开奖】按钮，关闭线程，此时显示在文本框中的电话号码即为中奖号码

 

 

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Threading;

namespace Ex02_Lottery

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        //定义一个泛型

        List<string> liNum = new List<string>();

        //定义一个全局变量

        Thread thread;

        private void btnRoll_Click(object sender, EventArgs e)

        {

            //定义一个线程

            thread =  new Thread(new ThreadStart(Num));

            //开启线程

            thread.Start();

            btnRoll.Enabled = false;

        }

        public void Num()

        {

            int i = 0;

           

            liNum.Add("13965113141");

            liNum.Add("18676768761");

            liNum.Add("13456468141");

            liNum.Add("15456564541");

            liNum.Add("13965113141");

            liNum.Add("13968766141");

            liNum.Add("13965113141");

            liNum.Add("13123113311");

            //循环

            while (i < liNum.Count + 1)

            {

                if (i >= liNum.Count) i = 0;

                txtNum.Text = liNum[i].ToString();

                i++;

            }

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            txtNum.Enabled = false;

            //线程间操作无效: 从不是创建控件“ btnRoll”的线程访问它。解决方法

            Form1.CheckForIllegalCrossThreadCalls = false;

        }

        private void btnLottery_Click(object sender, EventArgs e)

        {

            //挂想线程

            thread.Suspend();

            //恢复线程

            thread.Resume();

            //关闭线程

            thread.Abort();

            btnLottery.Enabled = false;

            MessageBox.Show("号码为:" + txtNum.Text + "恭喜你中奖了","信息提示");

        }

    }

}