Question

I am using sql server 2005

but having error message on
_sessionFactory = configuration.BuildSessionFactory();

What is wrong and how can I correct it?

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My Hibernate.cfg.xml

 <property name="connection.driver_class">NHibernate.Connection.DriverConnectionProvider</property>
<property name="dialect">NHibernate.Dialect.MsSql2000Dialect</property>
<!--<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>-->
<property name="connection.connection_string">Server=localhost\SQLServer2005;database=NHibernate101;Integrated Security=True;</property>
<property name="proxyfactory.factory_class">NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle</property>
<mapping assembly="Infrastructure"></mapping>

and my in my web.config

    <connectionStrings>
    <add name="ApplicationServices" connectionString="Server=localhost\SQLServer2005;database=NHibernate101;" providerName="NHibernate.Connection.DriverConnectionProvider"/>
</connectionStrings>

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Error message is:

NHibernate.HibernateException was unhandled by user code
Message=Could not create the driver from NHibernate.Connection.DriverConnectionProvider.
Source=NHibernate
StackTrace:
at NHibernate.Connection.ConnectionProvider.ConfigureDriver(IDictionary2 settings)
at NHibernate.Connection.ConnectionProvider.Configure(IDictionary2 settings)
at NHibernate.Connection.ConnectionProviderFactory.NewConnectionProvider(IDictionary2 settings)
at NHibernate.Cfg.SettingsFactory.BuildSettings(IDictionary2 properties)
at NHibernate.Cfg.Configuration.BuildSettings()
at NHibernate.Cfg.Configuration.BuildSessionFactory()
at Core.Domain.Repositories.NHibernateHelper.get_SessionFactory() in C:\Documents and Settings\nHibernate101\NHibernate101 Final\NHibernate101\Core\Domain\Repositories\NHibernateHelper.cs:line 22
at Core.Domain.Repositories.NHibernateHelper.OpenSession() in C:\Documents and Settings\nHibernate101\NHibernate101 Final\NHibernate101\Core\Domain\Repositories\NHibernateHelper.cs:line 30
at Core.Domain.Repositories.PostRepository.Core.IRepository.GetAll() in C:\Documents and Settings\nHibernate101\NHibernate101 Final\NHibernate101\Core\Domain\Repositories\PostRepository.cs:line 59
at NHibernate101.Controllers.PostsController.Index() in C:\Documents and Settings\nHibernate101\NHibernate101 Final\NHibernate101\NHibernate101\Controllers\PostsController.cs:line 22
at lambda_method(Closure , ControllerBase , Object[] )
at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary2 parameters)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 parameters)
at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.b__a()
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func1 continuation)
InnerException: System.InvalidCastException
Message=Unable to cast object of type 'NHibernate.Connection.DriverConnectionProvider' to type 'NHibernate.Driver.IDriver'.
Source=NHibernate
StackTrace:
at NHibernate.Connection.ConnectionProvider.ConfigureDriver(IDictionary2 settings)
InnerException:

Answer 1

You’re receiving that error because in your Hibernate.cfg.xml you’re telling NHibernate to use the NHibernate.Connection.DriverConnectionProvider class for connection.driver_class property. The connection.driver_class property is expecting an IDriver interface while the NHibernate.Connection.DriverConnectionProvider is not.