using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 用多线程实现双色球
{
    public partial class MainFrm : Form
    {
        private List lblist = new List();//写一个集合存储lb控件
        public MainFrm()
        {
            InitializeComponent();
           // Control.CheckForIllegalCrossThreadCalls = false;//捕获对错误线程的调用设置为false，真正项目中不要使用这种方法
        }
        bool isRuning = false;
        private void MainFrm_Load(object sender, EventArgs e)
        {
            //循环加载6个label标签
            for (int i = 0; i 6; i++)
            {
                Label lb = new Label();
                lb.Text = "0";
                lb.AutoSize = true;
                lb.Location = new Point(50 * i + 50, 100);
                this.Controls.Add(lb);//将所有lb控件显示在窗体上
                //写一个集合存放lb控件
                lblist.Add(lb);
            }
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            isRuning = true;
            Thread thread = new Thread(() =>
              {
                  Random r = new Random();
                  //不停改变lb的值
                  while (isRuning)
                  {
                      foreach (var item in lblist)
                      {
                          string str = r.Next(0, 10).ToString();
                          if (item.InvokeRequired)//多线程操作
                          {
                              //该属性为true，说明调用了外部线程
                              item.Invoke(new Actionstring>(s => { item.Text = s; }), str);

                          }
                          else
                          {
                              item.Text = str;
                          }
                          
                      }
                      Thread.Sleep(200);//数字改变的太快了，因此让他200毫秒改变一次
                  }
              });
            thread.IsBackground = true;//设置为后台线程
            thread.Start();
        }

        private void btnStope_Click(object sender, EventArgs e)
        {
            isRuning = false;
        }
    }
}