Use DI tool unity to create EF ObjectContext object - entity-framework-4

Question

I tried to register type in container using script below, it works well
Container.RegisterType<System.Data.Objects.ObjectContext,
ExSS.Repository.MyEntity>( "myentity", new InjectionConstructor());
however, when i try to use xml config:
<alias alias="ObjectContext"
type="System.Data.Objects.ObjectContext,System.Data.Entity" />
<alias alias="MyEntity" type="ExSS.Repository.MyEntity,ExSS.Repository"/>
<register type="ExSS.Repository.MyEntity,ExSS.Repository" mapTo="MyEntity"
name="myentity">
<constructor></constructor>
</register>
It does not work. The error message is:
The type name or alias ObjectContext could not be resolved. Please check your
configuration file and verify this type name.
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.InvalidOperationException: The type name or alias ObjectContext could
not be resolved. Please check your configuration file and verify this type name.
The stack trace is:
[InvalidOperationException: The type name or alias ObjectContext could not be resolved. Please check your configuration file and verify this type name.]
Microsoft.Practices.Unity.Configuration.ConfigurationHelpers.TypeResolverImpl.ResolveType(String typeNameOrAlias, Boolean throwIfResolveFails) +200
Microsoft.Practices.Unity.Configuration.ConfigurationHelpers.TypeResolver.ResolveType(String typeNameOrAlias) +59
Microsoft.Practices.Unity.Configuration.RegisterElement.GetRegisteringType() +70
Microsoft.Practices.Unity.Configuration.RegisterElement.ConfigureContainer(IUnityContainer container) +111
Microsoft.Practices.Unity.Configuration.ContainerConfiguringElement.ConfigureContainerInternal(IUnityContainer container) +39
Microsoft.Practices.Unity.Configuration.<>c__DisplayClass1.<ConfigureContainer>b__0(ContainerConfiguringElement element) +42
Microsoft.Practices.ObjectBuilder2.EnumerableExtensions.ForEach(IEnumerable`1 sequence, Action`1 action) +200
Microsoft.Practices.Unity.Configuration.ContainerElement.ConfigureContainer(IUnityContainer container) +269
Microsoft.Practices.Unity.Configuration.UnityConfigurationSection.Configure(IUnityContainer container, String configuredContainerName) +133
Microsoft.Practices.Unity.Configuration.UnityContainerExtensions.LoadConfiguration(IUnityContainer container, UnityConfigurationSection section, String containerName) +70
could anyone give some suggections? thanks very much

Answer 1

Found the reason, it is related to that assembly System.Data.Entity could not be loaded by CLR correctly. publicktokenkey and culture and version should be added. Config below works:
<alias alias="ObjectContext" type="System.Data.Objects.ObjectContext, System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<alias alias="MyEntity" type="ExSS.Repository.MyEntity, ExSS.Repository"/>
<register type="ObjectContext" mapTo="MyEntity" name="myentity">
<constructor />
</register>

Answer 2

Your configuration is wrong. It should be:
<alias alias="ObjectContext" type="System.Data.Objects.ObjectContext, System.Data.Entity" />
<alias alias="MyEntity" type="ExSS.Repository.MyEntity, ExSS.Repository"/>
<register type="ObjectContext" mapTo="MyEntity" name="myentity">
<constructor />
</register>