1.学习目的
学习Nhibernate基础知识。掌握Nhibernate的配置方法,实现对单表的简单操作,如:创建表,查询,添加,删除,修改。
2.开发环境+前期准备
开发环境: windows 2003,Visual studio .Net 2005,Sql server 2005 developer edition
前期准备: Nhibernate框架,我用的目前最新版NHibernate-<chsdate year="1899" month="12" day="30" islunardate="False" isrocdate="False" w:st="on">1.2.0</chsdate>.CR1, 下载地址:
http://downloads.sourceforge.net/nhibernate/NHibernate-1.2.0.CR1.msi?modtime=1172161735&big_mirror=0
3.开发步骤:
1).双击下载下来的NHibernate-<chsdate year="1899" month="12" day="30" islunardate="False" isrocdate="False" w:st="on">1.2.0</chsdate>.CR1.msi,将其安装到某个目录,我的目录为: E:/download project/orm/nhibernate.,打开该目录,即可以看到bin,doc,src三个子目录,分别为Realse好的dll或者exe目录,文档说明目录,和源程序目录.
2).打开visual studio 2005,创建类库项目NhibernateSample1
3).在解决方案管理其中,右键点击引用-添加引用,在选项卡种选择浏览,设定查找范围为:E:/download project/orm/nhibernate/bin,
添加对
Nhibernate.dll,log4net.dll, Iesi.Collections, HashCodeProvider
四个
dll
的引用
.
4).打开SQL Server Management Studio,创建数据库nhibernate。
5).在解决方案管理器中添加hibernate.cfg.xml文件。将下面代码粘贴到此文件:
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该文件是
Nhibernate
的配置文件,其中
connection.connection_string
为数据库连接字符串,
Dialect
项因为我用的是
SQL2005,
所以为
:MsSql2005Dialect
注意
:<mapping assembly=”NhibernateSample<chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="1" unitname="”" w:st="on">1”</chmetcnv>/>
表示映射
NhibernateSample1
程序集下的所有类,所以以后不要需要
Configuration.AddClass(..)
了;
6).
添加类文件
:User.cs,
添加代码
:
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6).
编写
User
类的映射配置文件
:User.hbm.xml
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注意:该映射文件的属性中的生成操作必须为:嵌入的资源.
7).编写管理ISession对象的辅助类: NHibernateHelper.cs,代码为:
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8)
编写测试
CRUD
类
:UserFixue
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9) 创建新单元测试项目 : TestProject1, 添加 NhibernateSample1 的引用
10 )创建单元测试类 : UnitTest1.cs, 并输入如下代码 :
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11 )在菜单 - 测试 - 加载元数据文件 选择 NHibernateStudy1.vsmdi ,然后按顺序执行 TestMethod1-TestMethod5, 全部成功 !
4. 总结
通过使用 Nhibernate ,基本上可以使开发人员不在接触繁琐的数据库表和数据库操作代码,您唯一需要关心的就是如何设计好类,让这些类满足您的业务需求。从扩展性来说 Nhinernate 具有非常好的扩展性。与代码生成比较, Nhibernate 更改数据表结构对代码的影响要远远小于代码生成。
如果您想下载Demo: /Files/jillzhang/simle.rar