NHibernate mapping error SQL Server 2008 Express - nhibernate-mapping

Question

I tried an example from NHibernate in Action book and when I try to run the app, it throws an exception saying "Could not compile the mapping document:
HelloNHibernate.Employee.hbm.xml"
Below is my code,
Employee.hbm.xml
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" auto-import="true">
<class name="HelloNHibernate.Employee, HelloNHibernate" lazy="false" table="Employee">
<id name="id" access="field">
<generator class="native"/>
</id>
<property name="name" access="field" column="name"/>
<many-to-one access="field" name="manager" column="manager" cascade="all"/>
</class>
</hibernate-mapping>
Program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NHibernate;
using System.Reflection;
using NHibernate.Cfg;
namespace HelloNHibernate
{
class Program
{
static void Main(string[] args)
{
CreateEmployeeAndSaveToDatabase();
UpdateTobinAndAssignPierreHenriAsManager();
LoadEmployeesFromDatabase();
Console.WriteLine("Press any key to exit...");
Console.ReadKey();
}
static void CreateEmployeeAndSaveToDatabase()
{
Employee tobin = new Employee();
tobin.name = "Tobin Harris";
using (ISession session = OpenSession())
{
using (ITransaction transaction = session.BeginTransaction())
{
session.Save(tobin);
transaction.Commit();
}
Console.WriteLine("Saved Tobin to the database");
}
}
static ISession OpenSession()
{
if (factory == null)
{
Configuration c = new Configuration();
c.AddAssembly(Assembly.GetCallingAssembly());
factory = c.BuildSessionFactory();
}
return factory.OpenSession();
}
static void LoadEmployeesFromDatabase()
{
using (ISession session = OpenSession())
{
IQuery query = session.CreateQuery("from Employee as emp order by emp.name asc");
IList<Employee> foundEmployees = query.List<Employee>();
Console.WriteLine("\n{0} employees found:", foundEmployees.Count);
foreach (Employee employee in foundEmployees)
Console.WriteLine(employee.SayHello());
}
}
static void UpdateTobinAndAssignPierreHenriAsManager()
{
using (ISession session = OpenSession())
{
using (ITransaction transaction = session.BeginTransaction())
{
IQuery q = session.CreateQuery("from Employee where name='Tobin Harris'");
Employee tobin = q.List<Employee>()[0];
tobin.name = "Tobin David Harris";
Employee pierreHenri = new Employee();
pierreHenri.name = "Pierre Henri Kuate";
tobin.manager = pierreHenri;
transaction.Commit();
Console.WriteLine("Updated Tobin and added Pierre Henri");
}
}
}
static ISessionFactory factory;
}
}
Employee.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace HelloNHibernate
{
class Employee
{
public int id;
public string name;
public Employee manager;
public string SayHello()
{
return string.Format("'Hello World!', said {0}.", name);
}
}
}
App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="nhibernate" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.3300.0, Culture=neutral
PublicKeyToken=b77a5c561934e089"/>
</configSections>
<nhibernate>
<add key="hibernate.show_sql" value="false"/>
<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=(local)\SQLEXPRESS; Database=HelloNHibernate;Integrated Security=SSPI;"/>
</nhibernate>
</configuration>

Answer 1

Let's open the Matryoshka doll a bit further, and solve the other problem:
In this line:
<section name="nhibernate" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.3300.0, Culture=neutral
PublicKeyToken=b77a5c561934e089"/>
you're missing a comma between "neutral" and "PublicKeyToken".
Give that a try.

Answer 2

Do you have a manager class and mapping defined? The
<many-to-one access="field" name="manager" column="manager" cascade="all"/>
line is looking for one. If the "manager" field is supposed to be an Employee, then you probably want:
<many-to-one access="field" name="manager" column="manager" class="HelloNHibernate.Employee, HelloNHibernate" cascade="all"/>

Answer 3

I think I see the problem now. The problem appears to be in this line:
<add key="hibernate.connection.connection_string" value="SQL2008EXPRESS" Database="HelloNHibernate;Integrated Security=SSPI;User Id=SQL2008"/>
The connection string is malformed, and it's throwing off the XML parser. Since the "value" attribute ends early, the XML parser thinks "Database=" is another XML attribute, but it's not one it recognizes, so it chokes. The solution is to fix the connection string.
The line should probably read:
<add key="hibernate.connection.connection_string" value="Server=(local)\SQLEXPRESS; Database=HelloNHibernate;Integrated Security=SSPI;"/>
This is assuming you're using Windows authentication; given that this is a learning project, that's probably the best way to go. If you're using SQL Server authentication, use this line instead:
<add key="hibernate.connection.connection_string" value="Server=(local)\SQLEXPRESS; Database=HelloNHibernate; User Id=theusername; Password=thepassword"/>
An aside: I don't think NHibernate 1.2.1GA has a SQL Server 2008 dialect. Instead, use NHibernate.Dialect.MsSql2005Dialect.