.NET数据库编程求索之路7.使用ADO.NET实现（工厂模式实现多数据库切换）（4）

7.使用ADO.NET实现（工厂模式-实现多数据库切换）（4）

7.7 业务逻辑层HomeShop.BLL

OrderBiz.cs

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 //新添命名空间
 6 using HomeShop.Model;
 7 using HomeShop.DALInterface;
 8 using HomeShop.DALFactory;
 9 
10 namespace HomeShop.BLL
11 {
12     public class OrderBiz
13     {
14         private IOrderDAO dao;
15 
16         public OrderBiz()
17         {
18             dao = (IOrderDAO)DataAccess.CreateDAO("OrderDAO");
19         }
20 
21         public int Add(Order order)
22         {
23             return dao.Add(order);
24         }
25 
26         public int Update(Order order)
27         {
28             return dao.Update(order);
29         }
30 
31         public int Delete(int orderID)
32         {            
33             return dao.Delete(orderID);
34         }
35 
36         public List<Order> GetList()
37         {
38             return dao.GetList();
39         }
40 
41         public List<Order> GetList(string customerName)
42         {
43             return dao.GetList(customerName);
44         }
45 
46         public Order GetSingle(int orderID)
47         {
48             return dao.GetSingle(orderID);
49         }
50 
51     }
52 }

OrderStateBiz.cs

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 //新添命名空间
 6 using HomeShop.Model;
 7 using HomeShop.DALInterface;
 8 using HomeShop.DALFactory;
 9 
10 namespace HomeShop.BLL
11 {
12     public class OrderStateBiz
13     {
14         private IOrderStateDAO dao;
15 
16         public OrderStateBiz()
17         {
18             dao = (IOrderStateDAO)DataAccess.CreateDAO("OrderStateDAO");
19         }
20 
21         public List<OrderState> GetList()
22         {
23             return dao.GetList();
24         }
25     }
26 }

7.7 界面层HomeShop.WinForm

 

App.config

 1 <?xml version="1.0" encoding="utf-8" ?>
 2 <configuration>
 3     <connectionStrings>
 4        
 5         <add name="HomeShop"
 6              connectionString="Data Source=(local);Initial Catalog=HomeShop;Integrated Security=SSPI;" />    
 7         <!--
 8         <add name="HomeShop"
 9              connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=HomeShop.mdb;" /> 
10         -->
11     </connectionStrings>
12     <appSettings>
13         
14         <add key="DAL" value="HomeShop.DALOfSql"/>
15         <!--
16         <add key="DAL" value="HomeShop.DALOfAccess"/>
17         -->
18     </appSettings>
19 </configuration>

 为支持数据库切换，需要配置App.config文件，其它界面层代码同前。

(本章结束)

 

源码下载：/Files/SummerRain/NetDbDevRoad/7使用ADONET实现工厂模式DB切换.rar

数据下载：/Files/SummerRain/NetDbDevRoad/HomeShopDB.rar