【实例类型】

1双色球类

方法的参数是对象。 

public List<string> Numbers { get; set; }        // 这个是对象的属性

  /// <summary>/// 双色球类/// /// 作用：主要是用来封装数据/// </summary>public class DoubleChromosphere{//public string Red1Number { get; set; }//public string Red2Number { get; set; }//public string Red3Number { get; set; }//public string Red4Number { get; set; }//public string Red5Number { get; set; }//public string Red6Number { get; set; }//public string Blue7Number { get; set; }请大家自学完课程后，可以尝试分开保存两种球的数字//public List<string> RedNumbers { get; set; }//public List<string> BlueNumbers { get; set; }//今天我们授课：把红色球和蓝色球放到一块public List<string> Numbers { get; set; }}

2选号器Selector

选号器看成是一个对象【秘书】

让对象去工作。

设计时：注意属性和字段，只在内部使用的变量用字段。 

    /// <summary>/// 选号器类/// </summary>public class Selector{//红色球池public List<string> RedNumberList { get; set; }//蓝色球池public List<string> BlueNumberList { get; set; }//存储选择的号码public List<DoubleChromosphere> SelectedNums { get; set; } = new List<DoubleChromosphere>();private Random random = new Random();//随机数生成器（只在本类内部使用）/// <summary>/// 构造方法：初始化球池的数字/// </summary>public Selector(){RedNumberList = new List<string>{"01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31","32","33"};BlueNumberList = new List<string>{"01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16"};}/// <summary>/// 生成7个随机不同的号码/// </summary>/// <returns></returns>public List<string> CreateRandomNum(){List<string> numList = new List<string>();//生成6个红色球while (true){if (numList.Count == 6) break;//如果随机选取了6个数字了，则退出循环string num = RedNumberList[random.Next(33)];if (numList.Contains(num)) continue;//如果是重复的数字，则重新随机抽取else{numList.Add(num);}                  }//生成一个蓝色球numList.Add(BlueNumberList[random.Next(16)]);return numList;}//打印、远程保存等（我们在深入的VIP系统学习中再讲解...)//这些方法，都会用到我们所保存的《已选择号码》}

【ui】

 其他类，是对象，只需要用【new】出，让对象去工作。

ui只需要关心【输入输出】，业务逻辑不必关心。

【字段】是类内全局变量。

1窗体的初始化

namespace xiketang.com.LotteryPro
{public partial class FrmMain : Form{//创建选号器对象private Selector newSelector = new Selector();//每次得到的随机数List<string> randomNum = null;public FrmMain(){InitializeComponent();this.btnSelect.Enabled = false;}

2对象工作

 //每次得到的随机数
 List<string> randomNum = null; 

        //启动选号private void btnStart_Click(object sender, EventArgs e){this.timerCreateNum.Start();//启动定时器this.btnSelect.Enabled = true;this.btnStart.Enabled = false;}//定时器事件：每隔50ms调用一次private void timerCreateNum_Tick(object sender, EventArgs e){//通过调用选号器，得到随机数randomNum = newSelector.CreateRandomNum();//在下面的列表中显示this.lblNum1.Text = randomNum[0];this.lblNum2.Text = randomNum[1];this.lblNum3.Text = randomNum[2];this.lblNum4.Text = randomNum[3];this.lblNum5.Text = randomNum[4];this.lblNum6.Text = randomNum[5];this.lblNum7.Text = randomNum[6];}//选择private void btnSelect_Click(object sender, EventArgs e){this.timerCreateNum.Stop();this.btnSelect.Enabled = false;this.btnStart.Enabled = true;//创建双色球对象DoubleChromosphere dc = new DoubleChromosphere{//Numbers = new List<string>()//{//    this.lblNum1.Text,//    this.lblNum2.Text,//    this.lblNum3.Text,//    this.lblNum4.Text,//    this.lblNum5.Text,//    this.lblNum6.Text,//    this.lblNum7.Text//}//对象初始化器【双色球对象】Numbers = this.randomNum  //我们因为已经保存了当前的一组数字，所以可以直接复制};//添加到选号池，以备后面的打印、远程保存等方法使用this.newSelector.SelectedNums.Add(dc);//显示号码string num = string.Empty;foreach (string item in this.randomNum){num += item + "  ";}this.lbNumberList.Items.Add(num);}//清除private void btnDel_Click(object sender, EventArgs e){this.newSelector.SelectedNums.Clear(); //从集合中清除this.lbNumberList.Items.Clear();//从列表中清除}//确认购买：需要保存到远程数据库或服务器（也可以通过webapi远程提交）private void btnConfirm_Click(object sender, EventArgs e){//首先打印//远程保存}

3程序入口

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;namespace xiketang.com.LotteryPro
{static class Program{/// <summary>/// 应用程序的主入口点。/// </summary>[STAThread]static void Main(){Application.EnableVisualStyles();Application.SetCompatibleTextRenderingDefault(false);Application.Run(new FrmMain());}}
}