Nhibernate教程2（3）

2）       含有关系的表的情况

含有关系的表指的是像学生这样，除了保存学生的基本信息，还希望把选课信息保存到学生的类中。这样情况下不能用软件来辅助产生对应的类和XML，这是NHibernate中唯一需要费脑筋学的地方。学生表对应的类和XML如下所示：

类文件（Student.cs） using System; using Iesi.Collections; namespace CodeTest{          public class Student{                    public Student(){}                    private int studentId;                    private string studentName;                    private string studentPassword;                    private string emailAddress;                    private DateTime dateCreated;                    private ISet courses = new HashedSet();                    public int StudentId{                             get { return studentId; }                             set { studentId = value; }                    }                    public string StudentName{                             get { return studentName; }                             set { studentName = value; }         }                    public string StudentPassword{                             get { return studentPassword; }                             set { studentPassword = value; }                   }                    public string EmailAddress{                             get { return emailAddress; }                             set { emailAddress = value; }} public DateTime DateCreated{                             get { return dateCreated; }                             set { dateCreated = value; }}                    public ISet Courses{                             get{return courses;}                             set{courses=value;}                    }                          } }

XML文件（Student.hbm.xml） <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">          <class name="NHibernateTest.Student, NHibernateTest" table="Student">                    <id name="StudentId" column="StudentId" type="Int32">                             <generator class="native" />                    </id>                    <property name="StudentName" column= "StudentName" type="string" length="40"/>                    <property name="StudentPassword" type="string" length="20"/>                    <property name="EmailAddress" type="String" length="40"/>                    <property name="DateCreated" type="DateTime" length="8"/>                   <set name="Courses" table="StudentCourse" inverse="false">                    <key column="StudentID"/>                    <many-to-many column="CourseID" class=" NHibernateTest.Course, NHibernateTest "/>                    </set> </class> </hibernate-mapping>