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Nhibernate配置与单表操作

发布时间:2008年5月31日 / 分类:ASP.NET / 6,248 次浏览 / 评论

数据库使用Access,使用Log4net纪录日志。
1、首先是web.config的配置,将NHibernate注册进系统

<?xml version="1.0"?>
<configuration>
?<configSections>
??<section name="hibernate-configuration" type="NHibernate.Cfg.ConfigurationSectionHandler, NHibernate"/>
?</configSections>

?<appSettings>
??<add key="NhibernateConfigFile" value="~/hibernate.cfg.xml"/>
?</appSettings>
?<connectionStrings/>
?<system.web>
??<compilation debug="true">
???<assemblies>
????<add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
????<add assembly="System.Data.OracleClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
???</assemblies>
??</compilation>
??<authentication mode="Windows"/>
?</system.web>
</configuration>

2、然后是Nhibernate的具体配置,这里使用Access数据库:hibernate.cfg.xml
Nhibernate支持N种数据库,可以自由选择需要的模块,在这里主要设置数据连接信息、使用的数据操作组件、以及纪录SQl语句、使用命名空间等信息。

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-configuration? xmlns="urn:nhibernate-configuration-2.2" >
?<session-factory name="VeryCodes.NHibernate.Access">
??<!-- properties -->
??<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
??<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
??<property name="connection.driver_class">NHibernate.JetDriver.JetDriver, NHibernate.JetDriver</property>
??<property name="dialect">NHibernate.JetDriver.JetDialect, NHibernate.JetDriver</property>
??<property name="connection.connection_string">Provider=Microsoft.Jet.OLEDB.4.0;Data Source=F:\wwwroot\verycodes\NhibernateTest\App_Data\db1.mdb</property>
??<property name="show_sql">true</property>
??<property name="use_outer_join">true</property>
??<property name="use_proxy_validator">false</property>
??<mapping assembly="VeryCodes.NHibernateData"/>
?</session-factory>
</hibernate-configuration>

3、log4net的配置

<?xml version="1.0" encoding="utf-8" ?>
<log4net>
?<appender name="rollingFile" type="log4net.Appender.RollingFileAppender">
??<param name="File" value="log.txt" />
??<param name="AppendToFile" value="false" />
??<param name="RollingStyle" value="Date" />
??<param name="DatePattern" value="yyyy.MM.dd" />
??<param name="StaticLogFileName" value="true" />
??<layout type="log4net.Layout.PatternLayout">
???<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] &lt;%X{auth}&gt; - %m%n" />
??</layout>
?</appender>
?<root>
??<!--如果只需要看看Sql设置INFO就够了,如果你要调试可以设置为DEBUG或ALL-->
??<priority value="INFO" />
??<appender-ref ref="rollingFile" />
?</root>
</log4net>

4、看一下Access表结构
表名:Cat
字段:CatID、Name、Sex、Weight、CatClassID
方便起见,全部设为文本格式
5、接着是Cat.cs实体类

using System;
using System.Collections.Generic;
using System.Text;

namespace VeryCodes.NhibernateData
{
??? public class Cat
??? {
??????? private string catID;
??????? private string name;
??????? private string sex;
??????? private string weight;

??????? public Cat()
??????? {
??????? }

??????? public string CatID
??????? {
??????????? get { return catID; }
??????????? set { catID = value; }
??????? }

??????? public string Name
??????? {
??????????? get { return name; }
??????????? set { name = value; }
??????? }

??????? public string Sex
??????? {
??????????? get { return sex; }
??????????? set { sex = value; }
??????? }

??????? public string Weight
??????? {
??????????? get { return weight; }
??????????? set { weight = value; }
??????? }
??? }

}

6、还需要创建一个映射文件,将实体对象与数据库表对应
这个文件要设置为:嵌入的资源
其中id节点指定了主键,并设置主键生成方式uuid.hex

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
?<class name="VeryCodes.NhibernateData.Cat,VeryCodes.NhibernateData" table="Cat" lazy="false">
??<id name="CatID">
???<column name="CatID" sql-type="char(32)" not-null="true"/>
???<generator />
??</id>

??<property name="Name" column="Name" type="string" length="16" not-null="true" />
??<property name="Sex" column="Sex" type="string" length="4" />
??<property name="Weight" column="Weight" type="string" length="4" />
?</class>
</hibernate-mapping>

7、添加数据

?//创建一个实体对象
??????? Cat princess = new Cat();

??????? //设置对象的属性
??????? princess.Name = CatName.Text;
??????? princess.Sex = CatSex.Text;
??????? princess.Weight = CatWeight.Text;

??????? //获取一个Session
??????? session = NHibernateHelper.GetCurrentSession();

??????? //开启事务
??????? ITransaction transaction = session.BeginTransaction();

??????? try
??????? {
??????????? //保存数据
??????????? session.Save(princess);

??????????? //提交事务
??????????? transaction.Commit();
??????? }
??????? catch (Exception ex)
??????? {
??????????? //回滚
??????????? transaction.Rollback();
??????????? throw ex;
??????? }
??????? finally
??????? {
??????????? //关闭Session
??????????? NHibernateHelper.CloseSession();
??????? }

8、修改数据

? //创建一个实体对象
??????? Cat princess = new Cat();

??????? //设置对象的属性
??????? princess.CatID = CatId.Value;
??????? princess.Name = CatName.Text;
??????? princess.Sex = CatSex.Text;
??????? princess.Weight = CatWeight.Text;

??????? //获取一个Session
??????? session = NHibernateHelper.GetCurrentSession();

??????? //开启事务
??????? ITransaction transaction = session.BeginTransaction();

??????? try
??????? {
??????????? //保存数据
??????????? session.Update(princess);

??????????? //提交事务
??????????? transaction.Commit();
??????? }
??????? catch (Exception ex)
??????? {
??????????? //回滚
??????????? transaction.Rollback();
??????????? throw ex;
??????? }
??????? finally
??????? {
??????????? //关闭Session
??????????? NHibernateHelper.CloseSession();
??????? }

9、删除数据

string strCatId = Request.QueryString["id"].ToString();
Cat getCat = (Cat)session.Load(typeof(Cat), strCatId);
session.Delete(getCat);

10、查询数据

//条件查询
??????????? //IQuery query = session.CreateQuery("select c from Cat as c where c.Sex = :sex");
??????????? //query.SetString("sex", "F");

??????????? IQuery query = session.CreateQuery("select c from Cat as c");

??????????? sb.Append("<table>");
??????????? //循环输出
??????????? foreach (Cat cat in query.Enumerable())
??????????? {
??????????????? sb.Append("<tr><td>" + cat.Name + "</td><td>" + cat.Sex + "</td><td>" + cat.Weight + "</td><td><a href='default.aspx?action=update&id=" + cat.CatID + "'>修改</a> <a href='default.aspx?action=delete&id=" + cat.CatID + "'>删除</a></td></tr>");
??????????? }
??????????? sb.Append("</table>");

OK,实现了单表增、删、改、查的操作。

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