Hi,
EDIT: Somethings wrong.... I have to use objectContext.Frontpages.ToArray() before I can use TryGetObjectByEntityKey(). Any ideas anyone?
I'm trying to retrieve an object from my database using entity (framework 4)
When I use the following code it gives an ArgumentException: An item with the same key has already been added.
if (databaseContext.TryGetObjectByKey(entityKey, out result))
{
return (result != null && result is TEntityObject) ? result as TEntityObject : null;
}
else
{
return null;
}
When I check the objectContext, I see the entities, but only if I enumerate the specific list of entities manually using VS2010, it works.
What am I missing? Do I have to do something else before i can get the item from the database?
I searched google, but could not find any results, the same for the msdn library
EDIT: Still working on this.... It's a weird problem. I retrieve a value, but get an error that says a duplicate item exists.
STACKTRACE:
[ArgumentException: An item with the same key has already been added.]
System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) +52
System.Collections.Generic.Dictionary2.Insert(TKey key, TValue value, Boolean add) +9549131
System.Data.Metadata.Edm.ObjectItemAttributeAssemblyLoader.LoadRelationshipTypes() +661
System.Data.Metadata.Edm.ObjectItemAttributeAssemblyLoader.LoadTypesFromAssembly() +17
System.Data.Metadata.Edm.ObjectItemAssemblyLoader.Load() +25
System.Data.Metadata.Edm.ObjectItemAttributeAssemblyLoader.Load() +4
System.Data.Metadata.Edm.AssemblyCache.LoadAssembly(Assembly assembly, Boolean loadReferencedAssemblies, ObjectItemLoadingSessionData loadingData) +160
System.Data.Metadata.Edm.AssemblyCache.LoadAssembly(Assembly assembly, Boolean loadReferencedAssemblies, KnownAssembliesSet knownAssemblies, EdmItemCollection edmItemCollection, Action1 logLoadMessage, Object& loaderCookie, Dictionary2& typesInLoading, List1& errors) +166
System.Data.Metadata.Edm.ObjectItemCollection.LoadAssemblyFromCache(ObjectItemCollection objectItemCollection, Assembly assembly, Boolean loadReferencedAssemblies, EdmItemCollection edmItemCollection, Action`1 logLoadMessage) +316
System.Data.Metadata.Edm.MetadataWorkspace.ImplicitLoadAssemblyForType(Type type, Assembly callingAssembly) +306
System.Data.Metadata.Edm.MetadataWorkspace.ImplicitLoadFromEntityType(EntityType type, Assembly callingAssembly) +109
System.Data.Objects.ObjectContext.TryGetObjectByKey(EntityKey key, Object& value) +288
EDIT: Lazy loading is set to true.
EDIT: Somethings wrong.... I have to use objectContext.Frontpages.ToArray() before I can use TryGetObjectByEntityKey(). Any ideas anyone?
