Hello,

I try out nHibernate for the first time, and I am unable to make it work !

I use VS 2008, VB.NET and nHibernate 1.2.1

I created a ConsoleApp with this code :


Imports NHibernate.Cfg
Imports NHibernate


Module Module1

Sub Main()
Dim cfg As New NHibernate.Cfg.Configuration()
cfg.AddAssembly("testNHibernate99")
Dim factory As ISessionFactory = cfg.BuildSessionFactory()
Dim session As ISession = factory.OpenSession()
Dim elements = session.CreateCriteria(GetType(testNHibernate99.Element)).List(Of testNHibernate99.Element)()
End Sub

End Module


Public Class Element
Private _Id As Integer
Private _Keyword As String
Public Property Id() As Integer
Get
Return _Id
End Get
Set(ByVal value As Integer)
_Id = value
End Set
End Property
Public Property Keyword()
Get
Return _Keyword
End Get
Set(ByVal value)
_Keyword = value
End Set
End Property
End Class





my app.config goes like this :

<?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"/>
<sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
<section name="WordDocPromoNew.Settings1" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
</sectionGroup>
</configSections>
<nhibernate>
<add key="hibernate.connection.provider" value="NHibernate.Connection.DriverConnectionProvider"/>
<add key="hibernate.dialect" value="NHibernate.Dialect.MsSql2005Dialect"/>
<add key="hibernate.connection.driver_class" value="NHibernate.Driver.SqlClientDriver"/>
<add key="hibernate.connection.connection_string" value="Server=server;Database=mydb;uid=sa;pwd=xxxx;"/>
<add key="hibernate.show_sql" value="true" />
</nhibernate>
</configuration>




and I embended as a resource a file called Element.hbm.xml that contains this :

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="testNHibernate99" assembly="testNHibernate99">
<class name="Element">
<id name="Id">
<generator class="assigned" />
</id>
<property name="Keyword" />
</class>
</hibernate-mapping>



When I run the project I get the following error on the line
Dim factory As ISessionFactory = cfg.BuildSessionFactory()

error :
{"property mapping has wrong number of columns: Element.testNHibernate99.Element type: Object"}

Thanks a lot for any help on this problem !

Regards,
Fabianus

I think the datatype is missing on the Keyword property. Try