NHibernate的三种常见配置方法

配置NHibernate有三种常见的配置方法。
1：在web.config,App.config里面配置

  
    

   
     <?
   
     xml version="1.0" encoding="utf-8" 
   
     ?>
   
     
   
     <
   
     configuration
   
     >
   
     
   
     <!--
   
      Add this element 
   
     -->
   
     
   
     <
   
     configSections
   
     >
   
     
   
     <
   
     section
   
     name
   
     ="hibernate-configuration"
   
     type
   
     ="NHibernate.Cfg.ConfigurationSectionHandler, NHibernate"
   
     
   
     />
   
     
   
     </
   
     configSections
   
     >
   
     
   
     <!--
   
      Add this element 
   
     -->
   
     
   
     <
   
     hibernate-configuration 
   
     xmlns
   
     ="urn:nhibernate-configuration-2.2"
   
     >
   
     
   
     <
   
     session-factory
   
     >
   
     
   
     <
   
     property 
   
     name
   
     ="dialect"
   
     >
   
     NHibernate.Dialect.MsSql2005Dialect
   
     </
   
     property
   
     >
   
     
   
     <
   
     property 
   
     name
   
     ="connection.provider"
   
     >
   
     NHibernate.Connection.DriverConnectionProvider
   
     </
   
     property
   
     >
   
     
   
     <
   
     property 
   
     name
   
     ="connection.connection_string"
   
     >
   
     Server=TLSZ207\SQLEXPRESS;initial catalog=Test;Integrated Security=true
   
     </
   
     property
   
     >
   
     
   
     </
   
     session-factory
   
     >
   
     
   
     </
   
     hibernate-configuration
   
     >
   
     
   
     <!--
   
      Leave the system.web section unchanged 
   
     -->
   
     
   
     <
   
     system
   
     .web
   
     >
   
     
   
     </
   
     system.web
   
     >
   
     
   
     </
   
     configuration
   
     >
  
    

则需要这样实例化Configuration对象。
NHibernate.Cfg.Configuration cfg = new NHibernate.Cfg.Configuration();
这种配置方法将会到应用程序配置文件（App.Config,Web.Config）中查找NHibernate的配置信息.

2：hibernate.cfg.xml
建立名为hibernate.cfg.xml的文件。实例化Configuration config = new Configuration().Configure();这样NHibernate将会在目录下寻找hibernate.cfg.xml的配置文件。
hibernate.cfg.xml的格式

  
    

   
     <?
   
     xml version="1.0" encoding="utf-8" 
   
     ?>
   
     
   
     <
   
     hibernate-configuration 
   
     xmlns
   
     ="urn:nhibernate-configuration-2.0"
   
      
   
     >
   
     
   
     <
   
     session-factory 
   
     name
   
     ="MySessionFactory"
   
     >
   
     
   
     <
   
     property 
   
     name
   
     ="dialect"
   
     >
   
     NHibernate.Dialect.MsSql2005Dialect
   
     </
   
     property
   
     >
   
     
   
     <
   
     property 
   
     name
   
     ="connection.provider"
   
     >
   
     NHibernate.Connection.DriverConnectionProvider
   
     </
   
     property
   
     >
   
     
   
     <
   
     property 
   
     name
   
     ="connection.connection_string"
   
     >
   
     Server=TLSZ207\SQLEXPRESS;initial catalog=Test;Integrated Security=true
   
     </
   
     property
   
     >
   
     
   
     </
   
     session-factory
   
     >
   
     
   
     </
   
     hibernate-configuration
   
     >
  
    

指明配置文件
Configuration config = new Configuration().Configure(configFileName);
这种配置方法将查找指定的Hibernate标准配置文件，可以是绝对路径或者相对路径。还可以通过编码的方式来添加配置信息：
IDictionary props = new Hashtable();
props[“dialect”] = "NHibernate.Dialect.MsSql2005Dialect";
...
Configuration cfg = new Configuration();
cfg.Properties = props;//cfg.AddProperties(props);


映射文件：
所有的XML映射都需要使用nhibernate-mapping-2.0 schema。目前的schema可以在NHibernate的资源路径或者是NHibernate.dll的嵌入资源（Embedded Resource）中找到。NHibernate总是会优先使用嵌入在资源中的schema文件。你可以将hibernate-mapping拷贝到C:\Program Files\Microsoft Visual Studio .NET 2003\Common7\Packages\schemas\xml路径中，以获得智能感知功能。

  
    

   
     <?
   
     xml version="1.0" encoding="utf-8" 
   
     ?>
   
     
   
     <
   
     hibernate-mapping 
   
     xmlns
   
     ="urn:nhibernate-mapping-2.2"
   
      namespace
   
     ="Test"
   
      assembly
   
     ="Test"
   
     >
   
     
   
     <
   
     class 
   
     name
   
     ="Test.Cat,Test"
   
      table
   
     ="Cat"
   
     >
   
     
   
     <
   
     id 
   
     name
   
     ="CatID"
   
     >
   
     
   
     <
   
     column 
   
     name
   
     ="CatID"
   
      sql-type
   
     ="char(32)"
   
      not-null
   
     ="true"
   
     />
   
     
   
     <
   
     generator 
   
     class
   
     ="uuid.hex"
   
      
   
     />
   
     
   
     </
   
     id
   
     >
   
     
   
     <
   
     property 
   
     name
   
     ="Name"
   
     >
   
     
   
     <
   
     column 
   
     name
   
     ="Name"
   
      length
   
     ="16"
   
      not-null
   
     ="true"
   
      
   
     />
   
     
   
     </
   
     property
   
     >
   
     
   
     <
   
     property 
   
     name
   
     ="Sex"
   
      
   
     />
   
     
   
     <
   
     property 
   
     name
   
     ="Weight"
   
      
   
     />
   
     
   
     </
   
     class
   
     >
   
     
   
     </
   
     hibernate-mapping
   
     >
  
    

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