Hello,
I'm new to nHibernate and am trying to get a quickstart working and have run into the following error:
Object reference not set to an instance of an object.
I've searched all over the place for an answer and tried reading through the documentation and i can't find an answer.
Thanks in advance!
Hibernate version: Build 2.0.1.GA
Mapping documents:
Code:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0"
namespace="QuickStart" assembly="QuickStart">
<class name="Cat" table="Cat">
<!-- A 32 hex character is our surrogate key. It's automatically
generated by NHibernate with the UUID pattern. -->
<id name="Id">
<column name="CatId" sql-type="int32" not-null="true"/>
</id>
<!-- A cat has to have a name, but it shouldn' be too long. -->
<property name="Name">
<column name="Name" length="16" not-null="true" />
</property>
<property name="Sex" />
<property name="Weight" />
</class>
</hibernate-mapping>
Code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'Dim helper As New QuickStart.NHibernateHelper
Dim session As ISession = QuickStart.NHibernateHelper.GetCurrentSession()
Dim tx As ITransaction = session.BeginTransaction
Dim princess As QuickStart.cat = New QuickStart.cat
princess.name = "Princess"
princess.sex = "F"
princess.weight = 34.34
session.Save(princess)
tx.Commit()
QuickStart.NHibernateHelper.CloseSession()
End Sub
Full stack trace of any exception that occurs:Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
NHibernate.Cfg.Environment.LoadGlobalPropertiesFromAppConfig() +412
NHibernate.Cfg.Environment..cctor() +221
[TypeInitializationException: The type initializer for 'NHibernate.Cfg.Environment' threw an exception.]
NHibernate.Cfg.Environment.get_Properties() +0
NHibernate.Cfg.Configuration.Reset() +401
NHibernate.Cfg.Configuration..ctor(SettingsFactory settingsFactory) +84
NHibernate.Cfg.Configuration..ctor() +56
NhibernateQuickStart.QuickStart.NHibernateHelper..cctor() in C:\Projects\Research\NhibernateQuickStart\NhibernateQuickStart\domain\NHibernateHelper.vb:11
[TypeInitializationException: The type initializer for 'NhibernateQuickStart.QuickStart.NHibernateHelper' threw an exception.]
NhibernateQuickStart.QuickStart.NHibernateHelper.GetCurrentSession() in C:\Projects\Research\NhibernateQuickStart\NhibernateQuickStart\domain\NHibernateHelper.vb:24
NhibernateQuickStart.WebForm1.Page_Load(Object sender, EventArgs e) in C:\Projects\Research\NhibernateQuickStart\NhibernateQuickStart\catpage.aspx.vb:9
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
Name and version of the database you are using:sql server 200
The generated SQL (show_sql=true):none
Debug level Hibernate log excerpt:i don't know.
my related web.config:
Code:
<configSections>
<section name="hibernate-configuration" type="NHibernate.Cfg.ConfigurationSectionHandler, NHibernate"/>
</configSections>
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.0">
<session-factory>
<property name="dialect">NHibernate.Dialect.MsSql2000Dialect</property>
<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
<property name="connection.connection_string">Server=DEV2;initial catalog=nhibernate;Integrated Security=TRUE</property>
<mapping assembly="NhibernateQuickStart"/>
</session-factory>
</hibernate-configuration>
EDIT:
I moved the config stuff to a nhibernate.cfg.xml file and put it in the root of my project and now this error is solved. I have new errors now, but i think i can figure them out.
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