图书管理系统源码-三层架构-工厂模式(含数据库脚本)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Configuration;
using System.Reflection;

namespace DalFactory
{
    public class DataAccess
    {
        static readonly string AssemblyName = ConfigurationSettings.AppSettings["DalAssemblyName"];
        public static IDAL.IReaderType CreateReaderType()
        {
            string ClassNamespace = AssemblyName ".ReaderType";
            object objType = Assembly.Load(AssemblyName).CreateInstance(ClassNamespace);
            return (IDAL.IReaderType)objType;
        }
        public static IDAL.IReaderInfo CreateReaderInfo()
        {
            string ClassNamespace = AssemblyName ".ReaderInfo";
            object objType = Assembly.Load(AssemblyName).CreateInstance(ClassNamespace);
            return (IDAL.IReaderInfo)objType;
        }
        public static IDAL.IReturn CreateReturn()
        {
            string ClassNamespace = AssemblyName ".Return";
            object objType = Assembly.Load(AssemblyName).CreateInstance(ClassNamespace);
            return (IDAL.IReturn)objType;
        }
        public static IDAL.IBorrow CreateBorrow()
        {
            string ClassNamespace = AssemblyName ".Borrow";
            object objType = Assembly.Load(AssemblyName).CreateInstance(ClassNamespace);
            return (IDAL.IBorrow)objType;
        }
        public static IDAL.IBookType CreateBookType()
        {
            string ClassNamespace = AssemblyName ".BookType";
            object objType = Assembly.Load(AssemblyName).CreateInstance(ClassNamespace);
            return (IDAL.IBookType)objType;
        }
        public static IDAL.IBookInfo CreateBookInfo()
        {
            string ClassNamespace = AssemblyName ".BookInfo";
            object objType = Assembly.Load(AssemblyName).CreateInstance(ClassNamespace);
            return (IDAL.IBookInfo)objType;
        }
    }
}