程時一門技術，更是一門藝術

簡單工廠模式利用面向對象方式通過繼承、封裝、多態(tài)把程序的耦合度降低，設計模式使得程序更加靈活，容易修改，易于復用。

下面是服務器計算器代碼：

代碼如下:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace DesignModel

{

/// <summary>

/// 計算器

/// </summary>

public class Calculator //創(chuàng)建一個計算器的基類可以接受兩個參數，任何算法只需重寫計算結果方法即可。

{

private double _numberA;

private double _numberB;

public double NumberA

{

get { return this._numberA; }

set { this._numberA = value; }

}

public double NumberB

{

get { return this._numberB; }

set { this._numberB = value; }

}

public virtual double GetResult()

{

double result = 0;

return result;

}

}

/// <summary>

/// 加法

/// </summary>

public class Add : Calculator //每添加一種計算方式只需添加一個計算類并重寫基類方法即可

{

public override double GetResult()

{

return NumberA + NumberB;

}

}

/// <summary>

/// 減法

/// </summary>

public class Sub : Calculator

{

public override double GetResult()

{

return NumberA + NumberB;

}

}

/// <summary>

/// 計算器工廠

/// </summary>

public class CalculatorFactory

{

public static Calculator GetResult(string oper)

{

Calculator calcu = null;

switch (oper)

{

case "+":

calcu = new Add();

break;

case "-":

calcu = new Sub();

break;

}

return calcu;

}

}

}

復制代碼 代碼如下:

static void Main(string[] args)

{

Console.WriteLine("請輸入數字A：");

string numbera = Console.ReadLine();

Console.WriteLine("請輸入運算符：");

string oper = Console.ReadLine();

Console.WriteLine("請輸入數字B：");

string numberb = Console.ReadLine();

Calculator c = CalculatorFactory.GetResult(oper);

c.NumberA = Convert.ToDouble(numbera);

c.NumberB = Convert.ToDouble(numberb);

Console.WriteLine(string.Format("{0}{1}{2}={3}", numbera, oper, numberb, c.GetResult()));

Console.ReadLine();

}

基本驗證沒加，學習練習的同學可以自己加上

28種設計模式后續(xù)更新

代碼如下:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace DesignModel

{

/// <summary>

/// 計算器

/// </summary>

public class Calculator //創(chuàng)建一個計算器的基類可以接受兩個參數，任何算法只需重寫計算結果方法即可。

{

private double _numberA;

private double _numberB;

public double NumberA

{

get { return this._numberA; }

set { this._numberA = value; }

}

public double NumberB

{

get { return this._numberB; }

set { this._numberB = value; }

}

public virtual double GetResult()

{

double result = 0;

return result;

}

}

/// <summary>

/// 加法

/// </summary>

public class Add : Calculator //每添加一種計算方式只需添加一個計算類并重寫基類方法即可

{

public override double GetResult()

{

return NumberA + NumberB;

}

}

/// <summary>

/// 減法

/// </summary>

public class Sub : Calculator

{

public override double GetResult()

{

return NumberA + NumberB;

}

}

/// <summary>

/// 計算器工廠

/// </summary>

public class CalculatorFactory

{

public static Calculator GetResult(string oper)

{

Calculator calcu = null;

switch (oper)

{

case "+":

calcu = new Add();

break;

case "-":

calcu = new Sub();

break;

}

return calcu;

}

}

}

本文就是.net設計模式中的簡單工廠模式的內容了，非常簡單，下一篇，我們來談談策略模式

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