NHibernate version: NHIBERNATE v1.0.2
Environment Used : ASP.NET ( C#) v2.0 - 2005
Name and version of the database i'm using: jojodb (sql serverexpress)
Dear Members,
My .cs file is:
namespace nhRegistration
{
public class Department
{
private int _id;
private string _name;
private IDictionary _classes;
private IDictionary _professors;
public Department()
{
// TODO: Add Constructor logic here :p
}
public int id
{
get
{
return _id;
}
set
{
_id = value;
}
}
public string name
{
get
{
return _name;
}
set
{
_name = value;
}
}
public IDictionary classes
{
get
{
return _classes;
}
set
{
_classes = value;
}
}
public IDictionary professors
{
get
{
return _professors;
}
set
{
_professors = value;
}
}
}
}
The mapping file coding is :
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
<class name="nhRegistration.Department, nhRegistration"
table="department">
<id name="id" column="DeptID" type="Int32" unsaved-value="0">
<generator class="assigned" />
</id>
<property name="name" column="deptname" type="String(50)"/>
<set name="classes" cascade="all">
<key column="deptid"></key>
<one-to-many class="nhRegistration.UniversityClass,nhRegistration"/>
</set>
<set name="professors" table="departmentprofessor">
<key column="deptid"></key>
<many-to-many class="nhRegistration.Person, nhRegistration"
column="PersonID" />
</set>
</class>
</hibernate-mapping>
In the database, i have the Department database filled with 2 records ...
The universityclass table is empty (no records submitted yet)
The DepartmentProfessor table is empty too (no records submitted yet)
Unable to cast object of type 'NHibernate.Collection.Set' to type 'System.Collections.IDictionary'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidCastException: Unable to cast object of type 'NHibernate.Collection.Set' to type 'System.Collections.IDictionary'.
Source Error:
Line 55: ISession session = factory.OpenSession();
Line 56: ITransaction tx = session.BeginTransaction();
Line 57: IList depts = session.CreateCriteria(typeof(Department)).List();
Line 58: session.Close();
Line 59: return depts;
Source File: c:\Documents and Settings\bacem\My Documents\Jawad Files\JAWAD'S Project\JustinGehtland\App_Code\RegMgr.cs Line: 57
Stack Trace:
[InvalidCastException: Unable to cast object of type 'NHibernate.Collection.Set' to type 'System.Collections.IDictionary'.]
NHibernate.Persister.GetSetHelper_nhRegistration_Department.SetPropertyValues(Object obj, Object[] values) +170
[MappingException: Invalid mapping information specified for type nhRegistration.Department, check your mapping file for property type mismatches]
NHibernate.Persister.GetSetHelper_nhRegistration_Department.SetPropertyValues(Object obj, Object[] values) +320
NHibernate.Persister.AbstractEntityPersister.SetPropertyValues(Object obj, Object[] values) +133
NHibernate.Impl.SessionImpl.InitializeEntity(Object obj) +499
NHibernate.Loader.Loader.InitializeEntitiesAndCollections(IList hydratedObjects, Object resultSetId, ISessionImplementor session) +186
NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParameters queryParameters, Object optionalObject, Object optionalId, Object[] optionalCollectionKeys, Boolean returnProxies) +681
NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters, Object optionalObject, Object optionalId, Object[] optionalCollectionKeys, Boolean returnProxies) +89
NHibernate.Loader.Loader.DoList(ISessionImplementor session, QueryParameters queryParameters) +45
NHibernate.Loader.Loader.List(ISessionImplementor session, QueryParameters queryParameters, ISet querySpaces, IType[] resultTypes) +344
NHibernate.Loader.CriteriaLoader.List(ISessionImplementor session) +857
NHibernate.Impl.SessionImpl.Find(CriteriaImpl criteria) +489
NHibernate.Impl.CriteriaImpl.List() +33
RegMgr.getDepartments() in c:\Documents and Settings\bacem\My Documents\Jawad Files\JAWAD'S Project\JustinGehtland\App_Code\RegMgr.cs:57
[TargetInvocationException: Exception has been thrown by the target of an invocation.]
System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) +0
System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) +72
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) +296
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +29
System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) +17
System.Web.UI.WebControls.ObjectDataSourceView.InvokeMethod(ObjectDataSourceMethod method, Boolean disposeInstance, Object& instance) +676
System.Web.UI.WebControls.ObjectDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +2664
System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +84
System.Web.UI.WebControls.DataBoundControl.PerformSelect() +154
System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +99
System.Web.UI.WebControls.DetailsView.DataBind() +24
System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +91
System.Web.UI.WebControls.DetailsView.EnsureDataBound() +198
System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +101
System.Web.UI.Control.EnsureChildControls() +134
System.Web.UI.Control.PreRenderRecursiveInternal() +109
System.Web.UI.Control.PreRenderRecursiveInternal() +233
System.Web.UI.Control.PreRenderRecursiveInternal() +233
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4435
public class RegMgr: IDBMgr
{
NHibernate.Cfg.Configuration config;
ISessionFactory factory;
public RegMgr()
{
config = new NHibernate.Cfg.Configuration();
config.AddClass(typeof(nhRegistration.Department));
config.AddClass(typeof(nhRegistration.Person));
config.AddClass(typeof(nhRegistration.UniversityClass));
factory = config.BuildSessionFactory();
}
public IList getDepartments()
{
ISession session = factory.OpenSession();
ITransaction tx = session.BeginTransaction();
[b]
IList depts = session.CreateCriteria(typeof(Department)).List();[/b]
session.Close();
return depts;
}
Regards,
Jojorico
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