C#简易商城收银系统v1.1简单工厂实现(2-2)

Posted 2022-10-11 zaohuojian

C#简易商城收银系统v1.1简单工厂实现(2-2)

1. 当初：
   • C#简易商城收银系统v1.0
2. 现在：
   • 用之前的工厂模式对商城收银系统v1.0进行升级

可以参考之前的 C#简易商城收银系统v1.0 随笔

添加CashSuper类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 商城收银软件

abstract class CashSuper  //现金收费抽象类

public abstract double acceptCash(double money); //现金收取的抽象方法.参数为原价,返回当前价格

 

添加CasHNormal类,并引用CashSuper类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 商城收银软件

class CasHNormal : CashSuper //正常收费类

public override double acceptCash(double money)

return money; //正常收费,原价返回

 

添加CashRebate类,并引用CashSuper类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 商城收银软件

class CashRebate : CashSuper//打折收费类

private double moneyRebate = 1d;
public CashRebate(string moneyRebate)

//打折收费初始化
//必须输入折扣率,如8折
this.moneyRebate = double.Parse(moneyRebate);


public override double acceptCash(double money)

return money * moneyRebate;

 

添加CashRrturn类,并引用CashSuper类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 商城收银软件

class CashReturn : CashSuper //返利收费子类

private double moneyCondition = 0.0d;
private double moneyReturn = 0.0d;
public CashReturn(string moneyCondition,string moneyReturn)

this.moneyCondition = double.Parse(moneyCondition);
this.moneyReturn = double.Parse(moneyReturn);

public override double acceptCash(double money)

double result = money;
if (money>=moneyCondition)//若大于返利,就减去返利值

result = money - Math.Floor(money / moneyCondition) * moneyReturn;

return result;

 

添加CashFactory类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 商城收银软件

 class CashFactory //现金收费工厂类


public static CashSuper createCashAccept(string type) 

CashSuper cs = null;
switch (type)

case "正常收费":
cs = new CasHNormal();
break;
case "满300返100":
cs = new CashReturn("300","100");
break;
case "打八折":
cs = new CashRebate("0.8");
break;

return cs

 

客户端主要类

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

namespace 商城收银软件

public partial class Form1 : Form //客户端类

public Form1()

InitializeComponent();

double total = 0.0d;//声明一个double变量,用total来计算总计
private void button1_Click(object sender, EventArgs e)

CashSuper csuper = CashFactory.createCashAccept(cbxType.SelectedItem.ToString());
double totalPrices = 0d;
totalPrices = csuper.acceptCash(Convert.ToDouble(txtPrice.Text)*Convert.ToDouble(txtNum.Text));


total = total + totalPrices;
lbxList.Text = "单价:" + txtPrice.Text + "数量:" + txtNum.Text + " " + cbxType.SelectedItem + "合计:" + totalPrices.ToString();  
lblResult.Text = total.ToString();



private void Form1_Load(object sender, EventArgs e)

cbxType.Items.AddRange(new object[]  "正常收费", "打8折", "满300返100");
cbxType.SelectedIndex = 0;

  

 

总结 面向对象简单工厂实例

添加多个不同商品折扣类型

定义工厂类

客户端实例化出来

多看 多敲 慢慢的就可以领悟其中的设计模式