用多线程实现“摇奖机”

来源：互联网发布：淘宝如何实名制编辑：程序博客网时间：2024/04/30 06:42

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 shibai
{
    public partial class Form3 : Form
    {
        delegate void SetLabelTextDelegate(Label lb, String text);
        SetLabelTextDelegate setLabelTextDel;
        bool isStart = false;
        Thread[] ths = new Thread[6];
        Random r = new Random(DateTime.Now.Millisecond);
        public Form3()
        {
            InitializeComponent();
            setLabelTextDel = new SetLabelTextDelegate(this.setText);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (isStart == false)
            {
                isStart = true;
                button1.Text = "停止";
                label8.Text = "";
                for (int i = 0; i < 6; i++)
                {
                    ths [i]=new Thread (new ParameterizedThreadStart (this.changeNumber ));
                    ths [i].Start ((Label )this.Controls ["label"+(i+1).ToString ()]);

}

            }
            else
            {
                isStart =false;
                button1.Text = "开启";
                label8.Text =string .Format ("中奖号码：{0} {1} {2} {3} {4} {5}", label1.Text ,label2 .Text ,label3 .Text ,label4 .Text ,label5.Text ,label6.Text ,label7 .Text );

            }
        }
        private void changeNumber(object label)
        {
            Label lb = (Label)label;
            int number = 0;
            while (isStart)
            {
                number = r.Next(10);
                this.Invoke(setLabelTextDel, lb, number.ToString());
                Thread.Sleep(100);
            }
        }
        private void setText(Label lb, string text)
        {
            lb.Text = text;
        }

        private void Form3_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (isStart)
            {
                MessageBox.Show("请先停止摇奖机，再点关闭");
                e.Cancel = true;
            }
        }
    }
}