通过多线程实现双色球选号，
要求：1、红球从01到33不能有重复；2、蓝球从1到16
效果如下：
难点：
1、多线程实现
2、跨线程修改UI
3、线程安全（红球不能有重复）
4、取消线程
5、线程取消导致的死锁
代码如下：
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace UnionLotto
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.Load += Form1_Load;
this.FormClosed += Form1_FormClosed;
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
System.Environment.Exit(0);//推出所有进程，防止程序关闭后报错
}
private void Form1_Load(object sender, EventArgs e)
{
//红球集合
for (int i = 0; i < redNums.Length; i++)
{
redNums[i] = (i + 1).ToString("00");
}
//蓝球集合
for (int i = 0; i < blueNums.Length; i++)
{
blueNums[i] = (i + 1).ToString("00");
}
this.btnStop.Enabled = false;
}
string[] redNums = new string[33];//红色球集合
string[] blueNums = new string[16];//蓝色球集合
private static object Lock_object = new object();//线程锁
CancellationTokenSource cts;
List<Task> tasks = new List<Task>();
private void btnStart_Click(object sender, EventArgs e)
{
this.btnStart.Text = "运行...";
this.btnStart.Enabled = false;
this.btnStop.Enabled = true;
cts = new CancellationTokenSource();
//先全部赋值为“00”
foreach (var item in groupBox1.Controls)
{
if (item is Label)
{
Label label = (Label)item;
label.Text = "00";
}
}
foreach (var item in groupBox1.Controls)
{
if (item is Label)
{
Label label = item as Label;
if (label.Name.Contains("Blue"))//蓝球
{
//1、通过线程获得随机蓝球
tasks.Add(Task.Run(() =>
{
while (!cts.IsCancellationRequested)
{
//获得随机数
int index = RandomHelper.GetRandomNumberDelay(0, 15);
//2、跨线程修改UI
this.Invoke(new Action(() =>
{
label.Text = blueNums[index];
}));
}
}));
}
else//红球
{
//1、通过线程获得随机红球
tasks.Add(Task.Run(() =>
{
while (!cts.IsCancellationRequested)
{
//获得随机数
int index = RandomHelper.GetRandomNumberDelay(0, 32);
string redNum = redNums[index];
lock (Lock_object)//3、线程锁，保证每个线程取值安全
{
List<string> redList = GetCurrentRedNumList();
//如果现有label的text中没有与redNum相同的则显示，否则进入下一循环
if (!redList.Contains(redNum))
{
//2、跨线程修改UI
this.Invoke(new Action(() =>
{
label.Text = redNum;
}));
}
}
}
}));
}
}
}
}
//获取红球集合
private List<string> GetCurrentRedNumList()
{
List<string> redNumList = new List<string>();
foreach (var item in groupBox1.Controls)
{
if (item is Label)
{
Label label = item as Label;
if (label.Name.Contains("Red"))
{
redNumList.Add(label.Text);
}
}
}
return redNumList;
}
private void btnStop_Click(object sender, EventArgs e)
{
cts.Cancel();//4、取消线程
//5、创建子线程来等待所有线程结束，否则将导致死锁
Task.Run(() =>
{
Task.WaitAll(tasks.ToArray());//4、线程取消后，等带所有线程完成
MessageBox.Show(RedNum1.Text + "," + RedNum2.Text + "," + RedNum3.Text + "," + RedNum4.Text + ","
+ RedNum5.Text + "," + RedNum6.Text + "," + BlueNum.Text + ",");
this.Invoke(new Action(() =>
{
this.btnStart.Text = "start";
this.btnStart.Enabled = true;
this.btnStop.Enabled = false;
}));
});
}
}
}
代码中获得随机数的方法如下：
using System;
using System.Threading;
namespace UnionLotto
{
public class RandomHelper
{
/// <summary>
/// new Random().Next(1,100);多线程同时执行结果很高概率相同，
/// 是用的当前事件为seed，时间相同结果相同
///
/// 解决随机数重复问题
/// 同事模拟远程请求的随机延时
/// </summary>
/// <param name="min"></param>
/// <param name="max"></param>
/// <returns></returns>
public static int GetRandomNumberDelay(int min, int max)
{
Thread.Sleep(GetRandomNumber(300, 500));
return GetRandomNumber(min, max);
}
public static int GetRandomNumber(int min, int max)
{
Guid guid = Guid.NewGuid();
string sGuid = guid.ToString();
int seed = DateTime.Now.Millisecond;
for (int i = 0; i < sGuid.Length; i++)
{
switch (sGuid[i])
{
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
seed = seed + 1;
break;
case 'h':
case 'i':
case 'j':
case 'k':
case 'l':
case 'm':
case 'n':
seed = seed + 2;
break;
case 'o':
case 'p':
case 'q':
case 'r':
case 's':
case 't':
seed = seed + 3;
break;
case 'u':
case 'v':
case 'w':
case 'x':
case 'y':
case 'z':
seed = seed + 4;
break;
default:
break;
}
}
Random random = new Random(seed);
return random.Next(min, max);
}
}
}
标签：case,双色球,int,Text,seed,线程,应用,new,多线程 From： https://www.cnblogs.com/hanzq/p/16826632.html