C # simple store cash register system v1.1 simple factory implementation (2-2)

C # simple store cash register system v1.1 simple factory implementation (2-2)

1. Original:
   • C # simple store cash register system v1.0
2. just now:
   • Before using the factory pattern to store cash register system v1.0 upgrade

Before you can reference C # simple store cash register system v1.0 essays

Add CashSuper class

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

namespace store cash register software 
{ 
abstract  class CashSuper   // cash charge abstract class 
{
 public  abstract  Double acceptCash ( Double Money) ; // abstract method parameters for the original cash receipt, return the current price 
} 
}

 

Add CasHNormal class, and class references CashSuper

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

namespace store cash register software 
{ 
class CasHNormal: CashSuper // normal fee category 
{
 public  the override  Double acceptCash ( Double Money) 
{ 
return Money; // normal fee, return List 
} 
} 
}

 

Add CashRebate class, and class references CashSuper

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

namespace store cash register software 
{ 
class CashRebate: CashSuper // discount a charge if the class 
{
 Private  Double moneyRebate = 1D;
 public CashRebate ( String moneyRebate) 
{ 
// discounts costs initialized
 // must enter the discount rate 20% as 
the this .moneyRebate = Double .Parse (moneyRebate); 

} 
public  the override  Double acceptCash(double money)
{
return money * moneyRebate;
}
}
}

 

Add CashRrturn class, and class references CashSuper

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;
}
}
}

 

Add CashFactory class

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

namespace store cash register software 
{ 
 class CashFactory // cash charges factory class 
{ 

public  static CashSuper createCashAccept ( String of the type) 
{ 
CS CashSuper = null ;
 Switch (type) 
{ 
Case  " normal charge " : 
CS = new 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
}
}
}

 

The main client class

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;//Declare a double variable, with a total calculated total 
Private  void the button1_Click ( Object SENDER, EventArgs E) 
{ 
CashSuper csuper = CashFactory.createCashAccept (cbxType.SelectedItem.ToString ());
 double totalPrices = 0D; 
totalPrices = csuper.acceptCash (the Convert. ToDouble (txtPrice.Text) * Convert.ToDouble (txtNum.Text)); 


Total = Total + totalPrices; 
lbxList.Text = " Price: " + + txtPrice.Text " number: " + txtNum.Text + "  " + cbxType. + SelectedItem " total:" + TotalPrices.ToString ();   
lblResult.Text = total.ToString (); 


} 
Private  void the Form1_Load ( Object SENDER, EventArgs E) 
{ 
cbxType.Items.AddRange ( new new  Object [] { " normal charge " , " 20% discount " , " full 300 back to 100 " }); 
cbxType.SelectedIndex = 0 ; 
} 
  } 
}

 

Summary object-oriented simple factory instance

Add a number of different types of merchandise discounts

Defined factory class

The client is instantiated out

See, knocking slowly can comprehend the design patterns