WinForms多線程編程之搖獎程序

利用多線程模擬一個電腦搖獎程序，如圖所示。在點擊【滾動號碼】，啟動線程，對後台的電話號碼進行循環顯示；點擊【開獎】按鈕，關閉線程，此時顯示在文本框中的電話號碼即為中獎號碼

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();
        }
        //定義一個泛型
        List<string> liNum = new List<string>();

        //定義一個全局變量
        Thread thread;

        private void btnRoll_Click(object sender, EventArgs e)
        {
            //定義一個線程
            thread =  new Thread(new ThreadStart(Num));

            //開啟線程
            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");

            //循環
            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;
            //線程間操作無效: 從不是創建控件“ btnRoll”的線程訪問它。解決方法
            Form1.CheckForIllegalCrossThreadCalls = false;
        }

        private void btnLottery_Click(object sender, EventArgs e)
        {
            //掛想線程
            thread.Suspend();

            //恢復線程
            thread.Resume();

            //關閉線程
            thread.Abort();

            btnLottery.Enabled = false;

            MessageBox.Show("號碼為:" + txtNum.Text + "恭喜你中獎了","信息提示");
        }
    }
}