NHibernate学习之五：三种常见的配置方法。

 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
  >