NHibernate是一个面向.NET环境的对象/关系数据库映射工具。对象/关系数据库映射(object/relational mapping,ORM)这个术语表示一种技术,用来把对象模型表示的对象映射到基于SQL的关系模型数据结构中去。
NHibernate下载地址:NHibernate
hibernate.cfg.xml:
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
<session-factory>
<property name="connection.provider">NHibernate.Connection.DriverConnectionProviderproperty>
<property name="dialect">NHibernate.Dialect.MySQL5Dialectproperty>
<property name="connection.driver_class">NHibernate.Driver.MySqlDataDriverproperty>
<property name="connection.connection_string">Server=localhost;Database=mygamedb;User ID=root;Password=123;property>
<property name="hbm2ddl.keywords">noneproperty>
<property name="show_sql">trueproperty>
session-factory>
hibernate-configuration>
注意:hibernate.cfg.xml文件的属性中“复制到输出目录”应设置为“始终复制”
< property name=”hbm2ddl.keywords”>none这个配置不加的话会报错,暂时不知道为什么,知道的老铁评论区留个言,谢谢!
1.创建一个User类:
using System;
namespace MyGameServer.Model
{
public class User
{
public virtual int Id { get; set; }
public virtual string Username { get; set; }
public virtual string Password { get; set; }
public virtual DateTime Registerdate { get; set; }
}
}
2.创建User与表的映射文件User.hbm.xml:
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
assembly="MyGameServer5"
namespace="MyGameServer5.Model">
<class name="User" table="users">
<id name="Id" column="id" type="Int32">
<generator class="native">generator>
id>
<property name="Username" column="username" type="String">property>
<property name="Password" column="password" type="String">property>
<property name="Registerdate" column="registerdate" type="Date">property>
class>
hibernate-mapping>
注意:User.hbm.xml文件的属性中“复制到输出目录”应设置为“不复制”,“生成操作”设置为“嵌入的资源”
assembly:该项目的程序集
namespace:User类的命名空间
< class name=”User”>:配置User类
< id name=”Id” colum=”id” type=”Int32”>:配置主键Id
< property name=”Username” colum=”username” type=”String”>:配置普通字段
name表示类中的属性名 colum表示数据库表中的字段名
1.创建一个Configuration对象,用来解析xml文件
var configuration = new Configuration();
2.解析数据库链接配置文件/解析hibernate.cfg.xml
configuration.Configure();
3.解析表映射文件User.hbm.xml…
configuration.AddAssembly(“MyGameServer5”);
using System;
using NHibernate;
using NHibernate.Cfg;
using MyGameServer5.Model;
namespace MyGameServer5
{
class Program
{
static void Main(string[] args)
{
var configuration = new Configuration();
configuration.Configure(); //解析hibernate.cfg.xml
configuration.AddAssembly("MyGameServer5"); //解析表映射文件User.hbm.xml...
Console.ReadKey();
}
}
}
1.获取会话工厂
sessionFactory = configuration.BuildSessionFactory();
2.开启一个和数据库的会话session
session = sessionFactory.OpenSession();
3.进行插入操作
User user = new User() { Username = “cch12345656”, Password = “oop12” };
session.Save(user);
using System;
using NHibernate;
using NHibernate.Cfg;
using MyGameServer5.Model;
namespace MyGameServer5
{
class Program
{
static void Main(string[] args)
{
var configuration = new Configuration();
configuration.Configure(); //解析hibernate.cfg.xml
configuration.AddAssembly("MyGameServer5"); //解析表映射文件User.hbm.xml...
ISessionFactory sessionFactory = null;
ISession session = null;
try
{
//获取会话工厂
sessionFactory = configuration.BuildSessionFactory();
//开启一个和数据库的会话session
session = sessionFactory.OpenSession();
//进行插入操作
User user = new User() { Username = "cch12345656", Password = "oop12" };
session.Save(user);
}
catch (Exception e)
{
Console.WriteLine(e);
}
finally
{
if (session != null)
{
session.Close();
}
if (sessionFactory != null)
{
sessionFactory.Close();
}
}
Console.ReadKey();
}
}
}
using System;
using NHibernate;
using NHibernate.Cfg;
using MyGameServer5.Model;
namespace MyGameServer5
{
class Program
{
static void Main(string[] args)
{
var configuration = new Configuration();
configuration.Configure(); //解析hibernate.cfg.xml
configuration.AddAssembly("MyGameServer5"); //解析Ma映射文件User.hbm.xml...
ISessionFactory sessionFactory = null;
ISession session = null;
ITransaction transaction = null;
try
{
//获取会话工厂
sessionFactory = configuration.BuildSessionFactory();
//开启一个和数据库的会话session
session = sessionFactory.OpenSession();
transaction = session.BeginTransaction();
User user = new User() { Username = "test1", Password = "oop12" };
User user1 = new User() { Username = "test1", Password = "oop12" };
session.Save(user);
session.Save(user1);
transaction.Commit();
}
catch (Exception e)
{
Console.WriteLine(e);
}
finally
{
if (transaction != null)
{
transaction.Dispose();
}
if (session != null)
{
session.Close();
}
if (sessionFactory != null)
{
sessionFactory.Close();
}
}
Console.ReadKey();
}
}
}
使用单例模式:从工厂ISessionFactory中取出Session
using System;
using NHibernate;
using NHibernate.Cfg;
namespace MyGameServer5
{
class SessionFactory
{
private static ISessionFactory sessionFactory;
public static ISessionFactory MSessionFactory
{
get
{
if (sessionFactory == null)
{
var configuration = new Configuration();
configuration.Configure(); //解析hibernate.cfg.xml
configuration.AddAssembly("MyGameServer5"); //解析Ma映射文件User.hbm.xml...
sessionFactory = configuration.BuildSessionFactory();
}
return sessionFactory;
}
}
public static ISession OpenSession()
{
return MSessionFactory.OpenSession();
}
}
}
1.添加操作:session.Save(user);
2.更新操作:session.Update(user);
3.删除操作:session.Delete(user);
4.简单查询操作:User user = session.Get< User>(id);
5.复杂查询操作:使用session得到ICriteria对象进行复杂查询
ICriteria criteria = session.CreateCriteria< User>();
添加查询条件Username为数据库中的字段名,username为查询的条件值,Add方法依然返回ICriteria对象,可添加多个条件进行查询
criteria.Add(Restrictions.Eq(“Username”,username)).Add(…)…;
criteria.UniqueResult< T>();获取单个结果,criteria.List< T>()获取多个结果集合
User user = criteria.UniqueResult< User>();
IList users = criteria.List< User>();
注意1:添加更新删除操作要进行事务Transaction操作,查询操作不需要
注意2:using(对象){}:using小括号中的对象只能作用在花括号范围,花括号执行结束,对象被释放,使用using可省略session.Close()操作
IUserManager:
using System;
using System.Collections.Generic;
using MyGameServer5.Model;
namespace MyGameServer5.Manager
{
public interface IUserManager
{
void Add(User user);
void Update(User user);
void Delete(User user);
User GetUserById(int id);
User GetUserByUsername(string username);
List GetAll();
bool Verfiy(string username, string password);
}
}
UserManager:
using System;
using System.Collections.Generic;
using System.Linq;
using NHibernate;
using NHibernate.Criterion;
using MyGameServer5.Model;
namespace MyGameServer5.Manager
{
public class UserManager:IUserManager
{
public void Add(Model.User user)
{
using(ISession session = SessionFactory.OpenSession()){
using(ITransaction transation = session.BeginTransaction()){
session.Save(user);
transation.Commit();
}
}
}
public void Update(Model.User user)
{
using (ISession session = SessionFactory.OpenSession())
{
using (ITransaction transation = session.BeginTransaction())
{
session.Update(user);
transation.Commit();
}
}
}
public void Delete(Model.User user)
{
using (ISession session = SessionFactory.OpenSession())
{
using (ITransaction transation = session.BeginTransaction())
{
session.Delete(user);
transation.Commit();
}
}
}
public Model.User GetUserById(int id)
{
ISession session = SessionFactory.OpenSession();
User user = session.Get(id);
return user;
}
public Model.User GetUserByUsername(string username)
{
ISession session = SessionFactory.OpenSession();
ICriteria criteria = session.CreateCriteria();
criteria.Add(Restrictions.Eq("Username",username));
User user = criteria.UniqueResult();
return user;
}
public List GetAll()
{
ISession session = SessionFactory.OpenSession();
ICriteria criteria = session.CreateCriteria(typeof(User));
IList users = criteria.List();
return users.ToList();
}
public bool Verfiy(string username, string password)
{
bool flag = false;
ISession session = SessionFactory.OpenSession();
ICriteria criteria = session.CreateCriteria(typeof(User));
criteria.Add(Restrictions.Eq("Username", username));
criteria.Add(Restrictions.Eq("Password", password));
User user = criteria.UniqueResult();
if (user != null)
{
flag = true;
}
return flag;
}
}
}