Nhibernate基本

根据以前使用hibernate的经验搭建nhibernate

1.配置sessionfactory(hibernate.cfg.xml)指定数据库连接串，方言，连接池和Mapping文件位置

<hibernate-configuration  xmlns="urn:nhibernate-configuration-2.2" ><!--此处版本号要和mapping文件中照应-->
  <session-factory name="NHibernate.Test">
    <property name="connection.driver_class">NHibernate.Driver.SqlClientDriver</property>
    <property name="connection.connection_string">
      Server=.;initial catalog=testDB;Integrated Security=True
    </property>
    <property name="adonet.batch_size">10</property>
    <property name="show_sql">false</property>
    <property name="dialect">NHibernate.Dialect.MsSql2008Dialect</property>
    <property name="command_timeout">60</property>
    <property name="query.substitutions">true 1, false 0, yes 'Y', no 'N'</property>
    <mapping assembly="NHibernateTest" resource="NHibernateTest.Mapping.PartMapping.hbm.xml" /><!--assembly指定工程名-->
    <mapping assembly="NHibernateTest" resource="NHibernateTest.Mapping.UserMapping.hbm.xml" />
  </session-factory>
</hibernate-configuration>

2.指定实体类（POCO）

//需要映射的实体类必须全部指定为virtual
    public class Part
    {
        public virtual string PartID { get; set; }
        public virtual string PartName { get; set; }
        public virtual ISet<User> UserSet { get; set; }//此处映射使用的ISet是hibernate的：Iesi.Collections.Generic.ISet
    }


    public class User
    {
        public virtual string UserID { get; set; }
        public virtual string UserName { get; set; }
        public virtual Part Part { get; set; }
    }

3.Mapping

<!--Part.hbm.xml-->
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
   assembly="NHibernateTest"
   namespace="NHibernateTest.Entity">
  <class name="Part" table="Parts">
    <id name="PartID" column="PartID">
      <generator class ="native"/>
    </id>
    <property name="PartName" column="PartName"></property>
    <set name="UserSet" table="Users">
      <key column="PartID" foreign-key="FK_UserPart"></key>
      <one-to-many class="User"/><!--Many-to-One映射默认是在one端维护-->
    </set>
  </class>
</hibernate-mapping>

<!--User.hbm.xml-->
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
   assembly="NHibernateTest"
   namespace="NHibernateTest.Entity"><!--指定namespace后在以后指示class的时候可以省略namespace-->
  <class name="User" table="Users">
    <id name="UserID" column="UserID">
      <generator class ="native"/>
    </id>
    <property name="UserName" column="UserName"/>
    <many-to-one name="Part" column="PartID" class="Part" foreign-key="FK_UserPart"></many-to-one>
  </class>
</hibernate-mapping>