C#----工厂模式的传统实现

using System;
using System.Collections.Generic;
using System.Text;

namespace NET.MST.Sixth.TraFactory
{
/// <summary>
/// 使用者
/// </summary>
    class Customer
    {
static void Main(string[] args)
        {
//根据需要获得不同的产品零件
            IProduct window = FactoryManager.GetProduct(RoomParts.Window);
            IProduct roof = FactoryManager.GetProduct(RoomParts.Roof);
            IProduct pillar = FactoryManager.GetProduct(RoomParts.Pillar);
        }
    }
/// <summary>
/// 屋子产品的零件
/// </summary>
    enum RoomParts
    {
        Roof,
        Window,
        Pillar
    }
/// <summary>
/// 工厂接口
/// </summary>
    interface IFactory
    {
        IProduct Produce();
    }
/// <summary>
/// 产品接口
/// </summary>
    interface IProduct
    {
        String GetName();
    }
/// <summary>
/// 工厂管理者
/// </summary>
    class FactoryManager
    {
public static IProduct 
            GetProduct(RoomParts part)
        {
            IFactory factory=null;
//这里就是传统工厂模式的弊端
//工厂管理者和工厂类族耦合
            switch (part)
            {
case RoomParts.Pillar:
                    factory = new PillarFactory();
break;
case RoomParts.Roof:
                    factory = new RoofFactory();
break;
case RoomParts.Window:
                    factory = new WindowFactory();
break;
            }
            IProduct product=factory.Produce();
            Console.WriteLine("生产了一个产品：" +
                    product.GetName());
return product;
        }
    }
#region 工厂类族
class RoofFactory : IFactory
    {
public IProduct Produce()
        {
return new Roof();
        }
    }
class WindowFactory : IFactory
    {
public IProduct Produce()
        {
return new Window();
        }
    }
class PillarFactory : IFactory
    {
public IProduct Produce()
        {
return new Pillar();
        }
    }
#endregion

#region 产品类族
class Roof : IProduct
    {
public String GetName()
        {
return "屋顶";
        }
    }
class Window : IProduct
    {
public String GetName()
        {
return "窗户";
        }
    }
class Pillar : IProduct
    {
public String GetName()
        {
return "柱子";
        }
    }
#endregion
}