dbfactory.cs

.net三层结构的源码

using System;
using System.Configuration;
using System.Collections.Generic;
using System.Text;
using SQLServerDal;
using AccessDal;
using IDal;

namespace DAL
{
    public class DBFactory
    {
        public static IDAL GetDB()
        {
            IDAL dal = null;
            string type = ConfigurationManager.AppSettings["dbtype"];
            if (type == "sqlserver")
            {
                dal = new SQLServerDal.SQLServerDal();
            }
            else if (type == "access")
            {
                dal = new AccessDal.AccessDal();
            }

            return dal;
        }
    }
}