引言：Nibernate概述

　　NHibernate是一个ORM框架，NHibernate是一个把C#对象世界和关系世界数据库之间联系起来的一座桥梁。NHibernate 能自动映射实体模型到数据库，所以这能让你集中考虑一件或多件事情。

 

1.给Program.cs文件添加代码

注意：以下程序仅供参考，不作为运行的依据。由于本文过旧，所以你必须从控制台进行安装，安装命令为： install-package NHibernate -version 2.1.2.4000

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using NHibernate.Cfg;using NHibernate;using System.Reflection;namespace NHibernatePets{    public class Pet    {        virtual public int id { get; set; }        virtual public string PetName { get; set; }        virtual public string Species { get; set; }        virtual public DateTime Birthday { get; set; }        virtual public string Speak()        {            return "你好！我的名字是 " + PetName + "，我是一个" + Species + " 以及我生日是" + Birthday;        }        }    public class Program    {        public static void Main(string[] args)        {            Pet peter = new Pet { PetName="peter",Species="Cat",Birthday=new DateTime(2010,10,20)};            Console.WriteLine(peter.Speak());            //把peter保存到数据库里面去            try            {                using (ISession session = OpenSession())                {                    using (ITransaction transaction = session.BeginTransaction())                    {                        session.Save(peter);                        transaction.Commit();                    }                    Console.WriteLine("peter已经保存到数据库！");                }                //从数据库里读取peter                using (ISession session = OpenSession())                {                    IQuery query = session.CreateQuery("From Pet");                    IList
     
       pets = query.List
      
       ();                    Console.Out.WriteLine("宠物的个数：" + pets.Count);                    pets.ToList().ForEach(p => Console.WriteLine(p.Speak()));                }                //更新宠物信息                using (ISession session = OpenSession())                {                    using (ITransaction transaction = session.BeginTransaction())                    {                        IQuery query = session.CreateQuery("From Pet where PetName='peter'");                        Pet pet = query.List
       
        ()[0];                        pet.PetName="Jason";                        transaction.Commit();                    }                }                //再次从数据库里读取所有的信息                using (ISession session = OpenSession())                {                    IQuery query = session.CreateQuery("From Pet");                    IList
        
          pets = query.List
         
          ();                    Console.Out.WriteLine("宠物的个数：" + pets.Count);                    pets.ToList().ForEach(p => Console.WriteLine(p.Speak()));                }                //删除宠物信息                using (ISession session = OpenSession())                {                    using (ITransaction transation = session.BeginTransaction())                    {                        IQuery query = session.CreateQuery("From Pet where PetName='Jason'");                        Pet pet = query.List
          
           ()[0]; session.Delete(pet); transation.Commit(); } } } catch (Exception e) { Console.WriteLine(e); } } static ISessionFactory SessionFactory; static ISession OpenSession() { //注意这种方式不是线程安全的 //SessionFactory会话费大量的资源，只创建一次 if (SessionFactory == null) { Configuration configuration = new Configuration(); configuration.AddAssembly(Assembly.GetCallingAssembly()); SessionFactory = configuration.BuildSessionFactory(); } return SessionFactory.OpenSession(); } }}