概况

(1)connection.driver_class 数据访问驱动
(2)dialect sql方言
(3)connection.connection_string 数据连接字符串
(4)connection.provider  数据库连接驱动
(5)connection.release_mode 连接释放模式 (6)default_entity_mode 实体表现模式

1.connection.driver_class

<property name="connection.driver_class">NHibernate.Driver.SqlClientDriver</property>\

用于配置数据访问驱动，

1若.net类库中有的，则用强类型，如SqlConnection,OldeConnection,OdbcConnection,OracleConnection.

如

/// <summary>/// Creates an uninitialized <see cref="IDbConnection" /> object for /// the SqlClientDriver./// </summary>/// <value>An unitialized <see cref="System.Data.SqlClient.SqlConnection"/> object.</value>public override IDbConnection CreateConnection(){return new SqlConnection();}/// <summary>/// Creates an uninitialized <see cref="IDbCommand" /> object for /// the SqlClientDriver./// </summary>/// <value>An unitialized <see cref="System.Data.SqlClient.SqlCommand"/> object.</value>public override IDbCommand CreateCommand(){return new System.Data.SqlClient.SqlCommand();}

2.若内置没有提供的，第三方提供的，则采用动态反射方式实现

如

public MySqlDataDriver() : base("MySql.Data","MySql.Data.MySqlClient.MySqlConnection","MySql.Data.MySqlClient.MySqlCommand"){}

2.dialect（sql方言）

既根据不同数据库，会采用不同了sql语句,如标准的分页查询就是用dialect的GetLimitString方法实现的

<property name="dialect">NHibernate.Dialect.MsSql2005Dialect</property>

3.数据连接字符串
(1)connection.connection_string

<property name="connection.connection_string">Data Source=CLINGINGBOY-PC\SQLEXPRESS;Initial Catalog=nhibernate;Integrated Security=True</property>

(2)connection.connection_string_name

从config中connectionStrings节点中获取连接字符串

4.数据库连接驱动
默认是实现IConnectionProvider接口的NHibernate.Connection.DriverConnectionProvider

<property name="connection.provider">NHibernate.Test.DebugConnectionProvider, NHibernate.Test</property>

实现Driver用户创建数据库驱动

public override IDbConnection GetConnection(){log.Debug("Obtaining IDbConnection from Driver");IDbConnection conn = Driver.CreateConnection();try{conn.ConnectionString = ConnectionString;conn.Open();}catch (Exception){conn.Dispose();throw;}return conn;}

public virtual void CloseConnection(IDbConnection conn){log.Debug("Closing connection");try{conn.Close();}catch (Exception e){throw new ADOException("Could not close " + conn.GetType() + " connection", e);}}

5.连接释放模式connection.release_mode

默认为auto,不必修改造成其他的错误

ConnectionReleaseMode releaseMode;if ("auto".Equals(releaseModeName)){releaseMode = ConnectionReleaseMode.AfterTransaction; //transactionFactory.DefaultReleaseMode;}else{releaseMode = ParseConnectionReleaseMode(releaseModeName);}

private static ConnectionReleaseMode ParseConnectionReleaseMode(string name){switch (name){case "after_statement":throw new HibernateException("aggressive connection release (after_statement) not supported by NHibernate");case "after_transaction":return ConnectionReleaseMode.AfterTransaction;case "on_close":return ConnectionReleaseMode.OnClose;default:throw new HibernateException("could not determine appropriate connection release mode [" + name + "]");}}

6.实体表现模式(default_entity_mode)

见此http://www.clingingboy.cn/article/53.aspx