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-
3． 开发步骤:
1).双击下载下来的nhibernate-
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:
<?xml version="1.0" encoding="utf-8" ?><hibernate-configuration xmlns="urn:nhibernate-configuration-2.2" > <session-factory name="nhibernate.test"> <!-- properties --> <property name="connection.provider">nhibernate.connection.driverconnectionprovider</property> <property name="connection.driver_class">nhibernate.driver.sqlclientdriver</property> <property name="connection.connection_string">server=127.0.0.1;initial catalog=nhibernate;uid=sa;pwd=123;</property> <property name="show_sql">false</property> <property name="dialect">nhibernate.dialect.mssql2005dialect</property> <property name="use_outer_join">true</property> <!-- mapping files --> <mapping assembly="nhibernatesample1" /> </session-factory> </hibernate-configuration> 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
6).添加类文件:user.cs,添加代码:
using system;using system.collections.generic;using system.text;namespace nhibernatesample1
{
public class user
{ private int _id; private string _name; private string _pwd; /**//// <summary> /// 编号
/// </summary> public virtual int id { get { return _id; } set { _id = value; } } /**//// <summary> /// 名称 /// </summary> public virtual string name { get { return _name; } set { _name = value; } } /**//// <summary> /// 密码 /// </summary> public virtual string pwd { get { return _pwd; } set { _pwd = value; } } }
} 6).编写user类的映射配置文件:user.hbm.xml
<?xml version="1.0" encoding="utf-8" ?><hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"> <class name="nhibernatesample1.user,nhibernatesample1" table="users" lazy="false"> <id name="id" column="id" unsaved-value="0"> <generator class="native" /> </id> <property name="name" column="name" type="string" length="64" not-null="true" unique="true"></property> <property name="pwd" column="pwd" type="string" length="64" not-null="true"></property> </class></hibernate-mapping> 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:
using system;using system.web;using nhibernate;using nhibernate.cfg;namespace nhibernatesample1{ public sealed class nhibernatehelper { private static readonly isessionfactory sessionfactory; static nhibernatehelper() { sessionfactory = new configuration().configure(@"e:/my project/nhibernate study/simle 1/nhibernatestudy1/nhibernatesample1/hibernate.cfg.xml").buildsessionfactory(); } public static isession getcurrentsession() { isession currentsession = sessionfactory.opensession(); return currentsession; } public static void closesessionfactory() { if (sessionfactory != null) { sessionfactory.close(); } } }}8) 编写测试crud类:userfixue
using system;using system.collections.generic;using system.text;using nhibernate;using nhibernate.cfg;using nhibernate.tool.hbm2ddl;namespace nhibernatesample1{ public class userfixure { private isession session; public userfixure() { } /**//// <summary> /// 创建表 /// </summary> public bool exporttable() { try { configuration cfg = new configuration().configure(@"e:/my project/nhibernate study/simle 1/nhibernatestudy1/nhibernatesample1/hibernate.cfg.xml"); session = nhibernatehelper.getcurrentsession(); itransaction transaction = session.begintransaction(); new schemaexport(cfg).create(true, true); transaction.commit(); return true; } catch(exception ex) { throw ex; } finally { session.close(); } } /**//// <summary> /// 添加 /// </summary> public int add() { try { user u = new user(); u.name = guid.newguid().tostring(); u.pwd = "124"; session = nhibernatehelper.getcurrentsession(); itransaction transaction = session.begintransaction(); session.save(u); transaction.commit(); return u.id; } catch (exception ex) { throw ex; } finally { session.close(); } } /**//// <summary> /// 更新 /// </summary> /// <param name="uid"></param> public bool update(int uid) { try { session = nhibernatehelper.getcurrentsession(); itransaction transaction = session.begintransaction(); user u = session.load(typeof(user), uid) as user; if (u != null) { u.name = "updatedname"; session.saveorupdate(u); transaction.commit(); u = session.load(typeof(user), uid) as user; if (u.name == "updatedname") { return true; } } return false; } catch (exception ex) { throw ex; } finally { session.close(); } } /**//// <summary> /// 删除 /// </summary> /// <param name="uid"></param> /// <returns></returns> public bool delete(int uid) { try
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