NHibernate学习笔记(1) —— 使用NHibernate中应注意的几个小问题

第一个NHibernate程序测试了用实体生成数据库表和数据添加，总结出以下几点需要注意：

1.app.config或web.config中要添加，版本的兼容性配置。

内容：

<runtime>
        <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
            <dependentAssembly>
                <assemblyIdentity name="NHibernate" publicKeyToken="AA95F207798DFDB4" culture="neutral"/>
                <bindingRedirect oldVersion="0.0.0.0-2.1.2.4000" newVersion="2.1.2.4000"/>
            </dependentAssembly>
        </assemblyBinding>
    </runtime>

为什么要添加，理解不透，我没有把NHibernate程序集添加到GAC，机器上也只有这一个版本的NHibernate，不知道为什么还要写这个，但是不写，就会出现“找不到程序集”之类的错误。
2.hibernate.cfg.xml配置（这里MS ACCESS 数据库为例，自己到svn下载编译了NHibernate.JetDriver.JetDriver项目）

内容：

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
  <session-factory>
    <property name="connection.release_mode">on_close</property>
    <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
    <property name="dialect">NHibernate.JetDriver.JetDialect, NHibernate.JetDriver</property>
    <property name="connection.driver_class">NHibernate.JetDriver.JetDriver, NHibernate.JetDriver</property>
    <property name="connection.connection_string">Provider=Microsoft.Jet.OLEDB.4.0;Data Source=..\..\..\Db\NHibernateFirst.mdb;</property>
    <property name="show_sql">true</property>
    <property name="proxyfactory.factory_class">NHibernate.ByteCode.Castle.ProxyFactoryFactory,NHibernate.ByteCode.Castle</property>

  </session-factory>
</hibernate-configuration>

3.控制台测试项目，需要引用的程序集

NHibernate.dll 这个不用说了，肯定要用。
NHibernate.ByteCode.Castle.dll ，如果用其他NHibernate支持的DynamicProxy，那要用NHibernate.ByteCode.xxx.dll ，这里用了Castle。
不引用出现的异常：

Unable to load type 'NHibernate.ByteCode.Castle.ProxyFactoryFactory,NHibernate.ByteCode.Castle' during configuration of proxy factory class.
Possible causes are:
- The NHibernate.Bytecode provider assembly was not deployed.
- The typeName used to initialize the 'proxyfactory.factory_class' property of the session-factory section is not well formed.

Solution:
Confirm that your deployment folder contains one of the following assemblies:
NHibernate.ByteCode.LinFu.dll
NHibernate.ByteCode.Castle.dll

NHibernate.JetDriver.dll，使用了NHibernate.dll没有内置的数据库驱动，要引用相应的程序集。
不引用出现异常：

Could not compile the mapping document: NHibernateFirst.Mappings.Product.hbm.xml

要用到不过不用在项目中添加引用的程序集还有：Iesi.Collections.dll、log4net.dll、Castle.DynamicProxy2.dll、Castle.Core.dll、Antlr3.Runtime.dll

4.测试代码

using System;
using System.Collections.Generic;
using System.Text;

using NHibernateFirst.Domain;
using NHibernate.Cfg;
using NHibernate.Tool.hbm2ddl;
using NHibernateFirst.Repositories;
using NHibernate;

namespace NHibernateFirst.Console
{
    class Program
    {
        static void Main(string[] args)
        {
            Configuration configuration = new Configuration();
            configuration.Configure();
            configuration.AddAssembly(typeof(Product).Assembly);
            new SchemaExport(configuration).Execute(false, true, false);
            ISessionFactory sessionFactory = configuration.BuildSessionFactory();
            using (ISession session = sessionFactory.OpenSession())
            {
                Product product;
                string instr;
                while ((instr = System.Console.ReadLine()) != "x")
                {
                    product = new Product { Name = "Apple", Category = instr };
                    IProductRepository repository = new ProductRepository();
                    session.Save(product);
                }
            }
            System.Console.Read();
        }
    }
}