Configuration.Configure() confusion

bobpardoe · **Joined:** Wed Nov 02, 2005 6:18 am **Posts:** 7

The place where <=== ERROR is shown causes an *Object reference not set to an instance of an object* error.

The file hibernate.cfg.xml has been placed in the output directory, so it can see it.

I have included a copy below, just in case it's layout is the cause.

Can anyone please tell me why

Thanks

BOb

Code:

 public sealed class Global
    {
        private static Configuration nhConfig;
        private static ISessionFactory nhFactory;

        public static ISession NHSession
        {
            get
            {
                if (nhFactory == null)
                {
                    nhConfig = new Configuration();
                    
                    nhConfig.Configure();                       <===== ERROR

                    nhConfig.AddAssembly("DAL");

                    nhFactory = nhConfig.BuildSessionFactory();                   
                }

                return nhFactory.OpenSession();
            }
        }

        private Global ()
        {
        }
    }

hibernate.cfg.xml

Code:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
   <configSections>
      <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
      <section name="nhibernate" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0,Culture=neutral, PublicKeyToken=b77a5c561934e089"   />
   </configSections>
   
   <log4net>
      <appender name="rollingFile" type="log4net.Appender.RollingFileAppender, log4net" >         
         <param name="File" value="log.txt" />
         <param name="AppendToFile" value="true" />
         <param name="RollingStyle" value="Date" />
         <param name="DatePattern" value="yyyy.MM.dd" />
         <param name="StaticLogFileName" value="true" />
         <layout type="log4net.Layout.PatternLayout, log4net">
            <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] &lt;%X{auth}&gt; - %m%n" />
         </layout>
      </appender>
      <root>
         <priority value="DEBUG" />
         <appender-ref ref="rollingFile" />
      </root>   
   </log4net>

   <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="Server=localhost;Database=LLBProTest;User=sa;Pwd=sqladmin;" />
      <add key="hibernate.show_sql" value="true" />
   </nhibernate>
</configuration>

[/code]

KPixel · **Posted:** Wed Nov 09, 2005 11:03 am

Can you post the full exception? (with the trace)

bobpardoe · **Joined:** Wed Nov 02, 2005 6:18 am **Posts:** 7

I am not sure how this will help, but what do I know, if I knew the answer, this posting would not be here

BOb

Code:

System.NullReferenceException was unhandled
  Message="Object reference not set to an instance of an object."
  Source="NHibernate"
  StackTrace:
       at NHibernate.Cfg.Configuration.Configure(XmlTextReader reader)
       at NHibernate.Cfg.Configuration.Configure(String resource)
       at NHibernate.Cfg.Configuration.Configure()
       at DAL.Global.get_NHSession() in C:\Documents and Settings\BNPardoe\My Documents\Visual Studio 2005\Projects\JavaConversion\DAL\Global.cs:line 22
       at DAL.AddressDAL..ctor() in C:\Documents and Settings\BNPardoe\My Documents\Visual Studio 2005\Projects\JavaConversion\DAL\AddressDAL.cs:line 24
       at ACRLogistics.Address..ctor() in C:\Documents and Settings\BNPardoe\My Documents\Visual Studio 2005\Projects\JavaConversion\Address\Address.cs:line 203
       at ACRLogistics.Form1.button1_Click(Object sender, EventArgs e) in C:\Documents and Settings\BNPardoe\My Documents\Visual Studio 2005\Projects\JavaConversion\WinTester\WindowsApplication1\Form1.cs:line 22
       at System.Windows.Forms.Control.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ButtonBase.WndProc(Message& m)
       at System.Windows.Forms.Button.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at ACRLogistics.Program.Main() in C:\Documents and Settings\BNPardoe\My Documents\Visual Studio 2005\Projects\JavaConversion\WinTester\WindowsApplication1\Program.cs:line 17
       at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()

cil65 · **Posted:** Wed Nov 16, 2005 7:15 pm

I am having the same problem. If I progmatically load the config it works but I can't get it to work with my config file "my.cfg.xml". I put the config file in the bin directory, but it was looking for it in system32. I put it there and got a different error.

KPixel · **Posted:** Thu Nov 17, 2005 11:55 am

Code:

nhConfig.Configure();

Is used to read the configuration from the file hibernate.cfg.xml.

k-dub · **Joined:** Thu May 12, 2005 8:45 am **Posts:** 226

Actually, it will try the {app|web}.config, then hibernate.cfg.xml.

KPixel · **Posted:** Thu Nov 17, 2005 12:32 pm

Hum, yes; it is Configure(...) which ignores the config file.

To bobpardoe, I didn't read your post carefully the first time.
Your hibernate.cfg.xml file has the layout of a app/web.config file.

Here is how hibernate.cfg.xml should be:

Code:

<?xml version="1.0" ?>
<hibernate-configuration  xmlns="urn:nhibernate-configuration-2.0" >
   <session-factory name="NHibernateEg">
      <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
      ...
   </session-factory>
</hibernate-configuration>

sergey · **Posted:** Thu Nov 17, 2005 1:58 pm

The NullReferenceException is thrown in 1.0 if no <hibernate-configuration> node with the right XML namespace was found - check that you have the xmlns declaration on it. 1.0.1 that was just released should give a better error message.

nhbdev · **Joined:** Thu Sep 29, 2005 3:30 pm **Posts:** 3

Add a key in web/app.config
like
<add key="nhibernate.config" value="~/nhibernate.config" />

For web apps we use
configuration.Configure( HttpContext.Current.Request.MapPath(ConfigurationSettings.AppSettings["nhibernate.config"]) ).BuildSessionFactory()

For non-web apps we use
configuration.Configure(ConfigurationSettings.AppSettings["nhibernate.config"]).BuildSessionFactory());

Question:
Is it possible to configure
<session-factory> and <mapping assembly> in web.config?