factory.cs

一个简单的网上书店

using System;
using System.Collections.Generic;
using System.Text;
using BLL.interfaces;

namespace BLL
{
   public class Factory
    {
       public static IBookType greatBookType()
       {
           Type t = Type.GetType("DAL.BookTypeDal,DAL");
           return (IBookType)Activator.CreateInstance(t);
       }
       public static IBook greatBook()
       {
           Type t = Type.GetType("DAL.BookDal,DAL");
           return (IBook)Activator.CreateInstance(t);
       }
       public static IOrder greatOreder()
       {
           Type t = Type.GetType("DAL.OrderDal,DAL");
           return (IOrder)Activator.CreateInstance(t);
       }
       public static IOrderBook greatOrderBook()
       {
           Type t = Type.GetType("DAL.OrderBookDal,DAL");
           return (IOrderBook)Activator.CreateInstance(t);
       }
       public static IPage greatPager()
       {
           Type t = Type.GetType("DAL.PageDal,DAL");
           return (IPage)Activator.CreateInstance(t);
       }
       public static IPublisher greatPub()
       {
           Type t = Type.GetType("DAL.PublisherDal,DAL");
           return (IPublisher)Activator.CreateInstance(t);
       }
       public static IReaderComments greatReaderComments()
       {
           Type t = Type.GetType("DAL.ReaderCommentsDal,DAL");
           return (IReaderComments)Activator.CreateInstance(t);
       }
       public static IUsers greatUsers()
       {
           Type t = Type.GetType("DAL.UsersDal,DAL");
           return (IUsers)Activator.CreateInstance(t);
       }
    }
}