實例說明：某窮工廠生產汽車零配件，只制作車窗和車門。

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首先把零部件抽象成一個類Hardware.cs：

Code
using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;

namespace?SimpleFactory
{
????public?abstract?class?Hardware
????{
????????public?string?hardwareName?{?get;?set;?}

????????public?virtual?string?GetHardware()?
????????{
????????????return?"";
????????}
????}
}

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具體產品（車窗和車門）繼承自該類，車窗類CarWindows.cs

Code
using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;

namespace?SimpleFactory
{
????class?CarWindows:Hardware
????{
????????public?CarWindows(string?name)
????????{
????????????this.hardwareName?=?name;
????????}

????????public?override?string?GetHardware()
????????{
????????????return?"this?is?:?"?+?this.hardwareName;
????????}
????}
}

?

車門類CarDoors.cs

Code
using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;

namespace?SimpleFactory
{
????public?class?CarDoors:Hardware
????{
????????public?CarDoors(string?name)
????????{
????????????this.hardwareName?=?name;
????????}

????????public?override?string?GetHardware()
????????{
????????????return?"this?is?:?"?+?this.hardwareName;
????????}
????}
}

?

簡單工廠的核心類集中了所有的判斷邏輯，決定返回什么對象，其中的主要方法一般聲明成靜態(tài)方法，所以又稱靜態(tài)工廠。

CarFactory.cs:

?

Code
using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;

namespace?SimpleFactory
{
????public?class?CarDoors:Hardware
????{
????????public?CarDoors(string?name)
????????{
????????????this.hardwareName?=?name;
????????}

????????public?override?string?GetHardware()
????????{
????????????return?"this?is?:?"?+?this.hardwareName;
????????}
????}
}

?

好了，現在可以在客戶端測試了。

?

Code
using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;

namespace?SimpleFactory
{
????class?Program
????{
????????static?void?Main(string[]?args)
????????{
????????????Hardware?hardware?=?CarFactory.CreateHareware("doors");
????????????Console.WriteLine(hardware.hardwareName);
????????????Console.Read();
????????}
????}
}

?

?

??????Tips：簡單工廠的產品類一般為具有某些共同特征的類，種類較多時可抽象出多個抽象產品類。

簡單工廠不大復雜，就這么簡單寫好了，以后再研究其他設計模式，希望能把23種設計模式寫完。

轉載于:https://www.cnblogs.com/flyman/archive/2009/08/01/1536451.html

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