NHibernate Verwenden Sie vorhandene ConnectionStrings in der app.config

Erstellen Sie mehrere ISessionFactories; eine für jede Datenbank, die Sie eine Verbindung herstellen möchten.

Überprüfen dieser Artikel.

Im Falle der Beibehaltung 2 verschiedene DB-Verbindung Frederik Gheysels link ist die beste Antwort.

AFAIK ist dies nicht möglich, verwenden Sie ein standard-App.config-format wie:

App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
    </configSections>
    <connectionStrings>
        <add name="ConnString1" connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=NhibernateDB;Integrated Security=True" providerName="System.Data.SqlClient" />
    </connectionStrings>
</configuration>

NHibernate bietet 3 Möglichkeiten, um zu Lesen, config, info:

Lesen der Konfiguration aus der App.config-Datei.

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="nhibernate" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0,Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
  </configSections>

  <!-- NHibernate Configuration -->
  <nhibernate>
    <add key="hibernate.connection.provider" value="NHibernate.Connection.DriverConnectionProvider"/>
    <add key="hibernate.dialect" value="NHibernate.Dialect.MsSql2000Dialect"/>
    <add key="hibernate.connection.driver_class" value="NHibernate.Driver.SqlClientDriver"/>
    <add key="hibernate.connection.connection_string" value="Data Source=(local)\sqlexpress;Initial Catalog=NHibernateDB;user=sa;Password=;Integrated Security=true"/>
  </nhibernate>
</configuration>

Verbesserte Art des Lesens Konfiguration von App.config-Datei.

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <configSections>
    <section name="hibernate-configuration" type="NHibernate.Cfg.ConfigurationSectionHandler, NHibernate" />
  </configSections>

  <!-- NHibernate Configuration -->
  <hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
    <session-factory>
      <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
      <property name="dialect">NHibernate.Dialect.MsSql2005Dialect</property>
      <property name="connection.driver_class">NHibernate.Driver.SqlClientDriver</property>
      <property name="connection.connection_string">Data Source=(local)\sqlexpress;Initial Catalog= NHibernateDB;user=sa;Password=;Integrated Security=True;</property>
<mapping assembly="NHibernate_Test.BO"/>
    </session-factory>
  </hibernate-configuration>
</configuration>

Lesen der Konfiguration aus hibernate.cfg.xml Datei

App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
</configuration>

hibernate.cfg.xml

<?xml version="1.0" encoding="utf-8" ?>    
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
  <session-factory>
    <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
    <property name="dialect">NHibernate.Dialect.MsSql2000Dialect</property>
    <property name="connection.driver_class">NHibernate.Driver.SqlClientDriver</property>
    <property name="connection.connection_string">Data Source=.\SQLEXPRESS;Initial Catalog=NHibernateDB; user=sa;Password=;Integrated Security=True</property>
    <property name="show_sql">false</property>
    <!--<property name="query.substitutions">true 1, false 0, yes 'Y', no 'N'</property>-->
    <mapping assembly="NHibernate_Test.BO" />
  </session-factory>
</hibernate-configuration>

Kann ich schlage vor, Sie laden config-Informationen in den code wie folgt:

public sealed class Persister : System.IDisposable
    {
        private NHibernate.ISessionFactory _sessionFactory;


        ///<summary> Configures NHibernate to access the data source and map entities to tables. </summary>
        public Persister()
        {
            System.Console.Out.WriteLine("Configuration of NHibernate...\n");
            const string connectionString = @"Data Source=(local)\sqlexpress;Initial Catalog=nhibernate;Integrated Security=SSPI";

            //Enable the logging of NHibernate operations
            log4net.Config.XmlConfigurator.Configure();

            //Create the object that will hold the configuration settings
            //and fill it with the information to access to the database
            NHibernate.Cfg.Configuration configuration = new NHibernate.Cfg.Configuration();
            configuration.Properties[NHibernate.Cfg.Environment.ConnectionProvider] = "NHibernate.Connection.DriverConnectionProvider";

            System.Console.Out.WriteLine("Use SQL Server database: ConnectionString = <"
                 + connectionString + ">\n");

            //These are the three lines of code to change in order to use another database
            configuration.Properties[NHibernate.Cfg.Environment.Dialect] = "NHibernate.Dialect.MsSql2000Dialect";
            configuration.Properties[NHibernate.Cfg.Environment.ConnectionDriver] = "NHibernate.Driver.SqlClientDriver";
            configuration.Properties[NHibernate.Cfg.Environment.ConnectionString] = connectionString;


            //Use NHibernate.Mapping.Attributes to create mapping information about our entities
            System.Console.Out.WriteLine("Generating the mapping information for NHibernate...\n");
            NHibernate.Mapping.Attributes.HbmSerializer.Default.Validate = true; //Enable validation (optional)
            using (System.IO.MemoryStream stream = NHibernate.Mapping.Attributes.HbmSerializer.Default.Serialize(System.Reflection.Assembly.GetExecutingAssembly()))
            {
                configuration.AddInputStream(stream); //Send the mapping information to NHibernate configuration
            }

            //Create the table in the database for the entity Message
            System.Console.Out.WriteLine("Creating the table in the database for the entity Message...");
            new NHibernate.Tool.hbm2ddl.SchemaExport(configuration).Create(true, true);


            //Build the SessionFactory
            System.Console.Out.WriteLine("\n\nBuilding the session factory, end of the configuration\n\n");
            _sessionFactory = configuration.BuildSessionFactory();
        }


        public void Dispose()
        {
            //Do not forget to close the session factory when you are done with it
            _sessionFactory.Close();
        }