1.首先建立两张表：parent和child，映射文件和Model类如下：
child.cs
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using System;
2using System.Collections;
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4namespace Test.Model
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}
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parent.cs
1using System;
2using System.Collections;
3using Iesi.Collections;
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5namespace Test.Model
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}
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child.hbm.xml:
1<?xml version="1.0" encoding="utf-8" ?>
2<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
3 <class name="Test.Model.Child, Test.Model" table="child">
4 <id name="Id" type="Int32" unsaved-value="null">
5 <column name="child_id" length="4" sql-type="int" not-null="true" unique="true" index="PK_child"/>
6 <generator class="native" />
7 </id>
8 <many-to-one
9 name="Parent"
10 column="parent_id"
11 class="Test.Model.Parent,Test.Model"
12 unique="true"
13 />
14 <property name="Cname" type="String">
15 <column name="cname" length="50" sql-type="varchar" not-null="false"/>
16 </property>
17 </class>
18</hibernate-mapping>
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parent.hbm.xml:
1<?xml version="1.0" encoding="utf-8" ?>
2<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
3 <class name="Test.Model.Parent,Test.Model" table="parent">
4 <id name="Id" type="Int32" unsaved-value="null">
5 <column name="parent_id" length="4" sql-type="int" not-null="true" unique="true" index="PK_parent"/>
6 <generator class="native" />
7 </id>
8 <set name="Childs" cascade="all" inverse="true" lazy="false">
9 <key column="parent_id" />
10 <one-to-many class="Test.Model.Child, Test.Model" />
11 </set>
12 <property name="Pname" type="String">
13 <column name="pname" length="50" sql-type="varchar" not-null="false"/>
14 </property>
15 </class>
16</hibernate-mapping>
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配置好了以后，我做如下操作：
1using System;
2using System.Collections.Generic;
3using System.Text;
4using NHibernate;
5using NHibernate.Cfg;
6using Test.Model;
7using Iesi.Collections;
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9namespace Console1
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}
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然后运行总是会提示如下错误：“Unkown Entity Class ：Test.Model.Parent”，我苦思一个晚上也没发现问题的所在，哪位高手能指点一下？感激不尽阿！