Question

I’m newbie in NHibernate. I’m trying using this ORM with SQLite.
I have the following:

Product.cs

namespace Stock.Models.Classes
{
    class Product
    {
        public virtual string Name {get; set;}
        public virtual int Id { get; set; }
        public virtual decimal Price { get; set; }
        public virtual decimal Quantity { get; set; }
    }
}

Product.hbm.xml

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
                  assembly="Stock.Models"
                  namespace="Stock.Models.Classes">
  <class name="Product" table="products">
    <id name="Id">
      <generator class="int" />
    </id>
    <property name="Name" />
    <property name="Price" />
    <property name="Quantity" />
  </class>
</hibernate-mapping>

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="connection.driver_class">NHibernate.Driver.SQLite20Driver</property>
    <property name="connection.connection_string">Data Source=nhibernate.db;Version=3</property>
    <property name="dialect">NHibernate.Dialect.SQLiteDialect</property>
    <property name="query.substitutions">true=1;false=0</property>
    <property name="proxyfactory.factory_class">NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle</property>
    <property name="show_sql">true</property>
  </session-factory>
</hibernate-configuration>

I’m trying to test in Program.cs.
Program.cs

namespace Stock
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            //Application.Run(new Form1());
            var cfg = new Configuration();
            cfg.Configure();
                cfg.AddAssembly(typeof(Product).Assembly);
        }
    }
}

In run time the app breaks in the line cfg.AddAssembly(typeof(Product).Assembly); with the message in the popup: Could not compile the mapping document: Stock.Models.Mappings.Product.hbm.xml and in console:

The thread 'vshost.LoadReference' (0x10a8) has exited with code 0 (0x0).
'Stock.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\...\Projects\WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\Stock.exe', Symbols loaded.
'Stock.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\...\Projects\WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\NHibernate.dll'
'Stock.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'Stock.vshost.exe' (Managed (v4.0.30319)): Loaded 'jsw3tdap'
'Stock.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\...\Projects\WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\Iesi.Collections.dll'
A first chance exception of type 'NHibernate.MappingException' occurred in NHibernate.dll

If I add a try/catch in Program.cs :

 try
    {
        cfg.AddAssembly(typeof(Product).Assembly);
    }
 catch (Exception e) { Console.WriteLine(e); }

I get (console):

A first chance exception of type 'NHibernate.MappingException' occurred in NHibernate.dll
NHibernate.MappingException: Could not compile the mapping document: Stock.Models.Mappings.Product.hbm.xml ---> NHibernate.MappingException: persistent class Stock.Models.Classes.Product, Stock.Models not found ---> System.IO.FileNotFoundException: Could not load file or assembly 'Stock.Models' or one of its dependencies. El sistema no puede encontrar el archivo especificado.
   at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
   at System.Reflection.Assembly.Load(String assemblyString)
   at NHibernate.Util.ReflectHelper.TypeFromAssembly(AssemblyQualifiedTypeName name, Boolean throwOnError)
   at NHibernate.Util.ReflectHelper.ClassForName(String name)
   at NHibernate.Cfg.XmlHbmBinding.Binder.ClassForFullNameChecked(String fullName, String errorMessage)
   --- End of inner exception stack trace ---
   at NHibernate.Cfg.XmlHbmBinding.Binder.ClassForFullNameChecked(String fullName, String errorMessage)
   at NHibernate.Cfg.XmlHbmBinding.Binder.ClassForNameChecked(String name, Mappings mappings, String errorMessage)
   at NHibernate.Cfg.XmlHbmBinding.ClassBinder.BindClass(IEntityMapping classMapping, PersistentClass model, IDictionary`2 inheritedMetas)
   at NHibernate.Cfg.XmlHbmBinding.RootClassBinder.Bind(HbmClass classSchema, IDictionary`2 inheritedMetas)
   at NHibernate.Cfg.XmlHbmBinding.MappingRootBinder.AddRootClasses(HbmClass rootClass, IDictionary`2 inheritedMetas)
   at NHibernate.Cfg.XmlHbmBinding.MappingRootBinder.AddEntitiesMappings(HbmMapping mappingSchema, IDictionary`2 inheritedMetas)
   at NHibernate.Cfg.XmlHbmBinding.MappingRootBinder.Bind(HbmMapping mappingSchema)
   at NHibernate.Cfg.Configuration.AddDeserializedMapping(HbmMapping mappingDocument, String documentFileName)
   --- End of inner exception stack trace ---
   at NHibernate.Cfg.Configuration.LogAndThrow(Exception exception)
   at NHibernate.Cfg.Configuration.AddDeserializedMapping(HbmMapping mappingDocument, String documentFileName)
   at NHibernate.Cfg.Configuration.AddValidatedDocument(NamedXmlDocument doc)
   at NHibernate.Cfg.Configuration.ProcessMappingsQueue()
   at NHibernate.Cfg.Configuration.AddDocumentThroughQueue(NamedXmlDocument document)
   at NHibernate.Cfg.Configuration.AddXmlReader(XmlReaThe thread 'vshost.RunParkingWindow' (0x1700) has exited with code 0 (0x0).
The thread '<No Name>' (0x5d4) has exited with code 0 (0x0).
The program '[4428] Stock.vshost.exe: Managed (v4.0.30319)' has exited with code 0 (0x0).
The program '[4428] Stock.vshost.exe: Program Trace' has exited with code 0 (0x0).
der hbmReader, String name)
   at NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream, String name)
   at NHibernate.Cfg.Configuration.AddResource(String path, Assembly assembly)
   at NHibernate.Cfg.Configuration.AddAssembly(Assembly assembly)
   at Stock.Program.Main() in C:\Users\Cristhian\documents\visual studio 2010\Projects\WindowsFormsApplication1\WindowsFormsApplication1\Program.cs:line 25

XML files are seted as Embedded Resource and Copy Always. Why does not compile the mapping document Stock.Models.Mappings.Product.hbm.xml? Is it a problem of file format or a library dll problem?

Answer 1

Well, the Stock.Models assembly doesn’t exist. The only assembly that exists is Stock, so you need to change your mapping file accordingly:

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
                  assembly="Stock"
                  namespace="Stock.Models.Classes">