3.3.2 .NET下的O/R Mapping框架的介绍和简单方法

（对象结构定义User.cs）
public class User
{
public User()
{
}
private string id;
private string userName;
private string password;
private string emailAddress;
private DateTime lastLogon;
public string Id
{
get { return id; }
set { id = value; }
}
public string UserName
{
get { return userName; }
set { userName = value; }
}
public string Password
{
get { return password; }
set { password = value; }
}
public string EmailAddress
{
get { return emailAddress; }
set { emailAddress = value; }
}
public DateTime LastLogon
{
get { return lastLogon; }
set { lastLogon = value; }
}
}
（映射文件定义User.hbm.xml）
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
<class name="NHibernateWebDemo.Model.User, NHibernateWebDemo.Model" 
table= "users">
<id name="Id" column="LogonId" type="String" length="20">
<generator class="assigned" />
</id>
<property name="UserName" column= "Name" type="String" length="40"/>
<property name="Password" type="String" length="20"/>
<property name="EmailAddress" type="String" length="40"/>
<property name="LastLogon" type="DateTime"/>
</class>
</hibernate-mapping>   

Configuration config=new Configuration();

ISessionFactory factory = config.BuildSessionFactory();

ISession session = factory.OpenSession();

ITransaction trans = session.BeginTransaction();

User obj=new User();
obj. UserName=”zyg”;
session.Save(obj);
trans.Commit();

[ActiveRecord]
public class User : ActiveRecordBase<User>
{
private int id;
private string username;
private string password;
public User() 
{
}
public User(string username, string password)
{
this.username = username;
this.password = password;
}
[PrimaryKey]
public int Id
{
get { return id; }
set { id = value; }
}
[Property]
public string Username
{
get { return username; }
set { username = value; }
}
[Property]
public string Password
{
get { return password; }
set { password = value; }
}
}

XmlConfigurationSource source = 
new XmlConfigurationSource("appconfig.xml");
ActiveRecordStarter.Initialize( source, typeof(User) );

ActiveRecordStarter.CreateSchema();

User user = new User("admin", "123");
user.Create();

user.Username=”administrator”;
user.Update();

[Serializable]
public class Person
{
private int id;
private string firstName;
private string lastName;
private DateTime? birthDate;
private double? weightInKilograms;
private double? heightInMeters;
public Person() { }
public int Id
{
get { return id; }
set { id = value; }
}
public string FirstName
{
get { return firstName; }
set { firstName = value; }
}
public string LastName
{
get { return lastName; }
set { lastName = value; }
}
public DateTime? BirthDate
{
get { return birthDate; }
set { birthDate = value; }
}
public double? WeightInKilograms
{
get { return weightInKilograms; }
set { weightInKilograms = value; }
}
public double? HeightInMeters
{
get { return heightInMeters; }
set { heightInMeters = value; }
}
}

<?xml version="1.0" encoding="utf-8" ?>
<sqlMap namespace="Person" xmlns="http://ibatis.apache.org/mapping" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" >
<alias>
<typeAlias alias="Person" type="IBatisNetDemo.Domain.Person,
IBatisNetDemo" />
</alias>
<resultMaps>
<resultMap id="SelectAllResult" class="Person">
<result property="Id" column="PER_ID" />
<result property="FirstName" column="PER_FIRST_NAME" />
<result property="LastName" column="PER_LAST_NAME" />
<result property="BirthDate" column="PER_BIRTH_DATE" />
<result property="WeightInKilograms" column="PER_WEIGHT_KG" />
<result property="HeightInMeters" column="PER_HEIGHT_M" />
</resultMap>
</resultMaps>
<statements>
<select id="SelectAllPerson" resultMap="SelectAllResult">
select
PER_ID,
PER_FIRST_NAME,
PER_LAST_NAME,
PER_BIRTH_DATE,
PER_WEIGHT_KG,
PER_HEIGHT_M
from PERSON
</select>
<select id="SelectByPersonId" resultClass="Person"
parameterClass="int"> 
select
PER_ID,
PER_FIRST_NAME,
PER_LAST_NAME,
PER_BIRTH_DATE,
PER_WEIGHT_KG,
PER_HEIGHT_M
from PERSON
where PER_ID = #value#
</select>
<insert id="InsertPerson" parameterclass="Person" >
<selectKey property="Id" type="post" resultClass="int">
${selectKey}
</selectKey> 
insert into Person
( PER_FIRST_NAME,
PER_LAST_NAME,
PER_BIRTH_DATE,
PER_WEIGHT_KG,
PER_HEIGHT_M)
values
(#FirstName#,#LastName#,#BirthDate#, 
#WeightInKilograms#, #HeightInMeters#)
</insert>
<update id="UpdatePerson"
parameterclass="Person">
<![CDATA[ update Person set
PER_FIRST_NAME =#FirstName#,
PER_LAST_NAME =#LastName#,
PER_BIRTH_DATE =#BirthDate#,
PER_WEIGHT_KG=#WeightInKilograms#,
PER_HEIGHT_M=#HeightInMeters#
where
PER_ID = #Id#　]]>
</update>
<delete id="DeletePerson" parameterclass="Person">
delete from Person
where
PER_ID = #Id#
</delete>
</statements>
</sqlMap>

DomSqlMapBuilder d=new DomSqlMapBuilder();
SqlMapper sm=d.Configure("SqlMap.config");

sm. QueryForList(“SelectByPersonId”,null);

Person p=new Person();
p.id=1;
p. FirstName=”zyg”;
sm.Insert(“InsertPerson”,p);