Hello

I am having anissue with the MEF instantiation of the IGlobalCache class (from TempHire) whendefined as a parameter to a ViewModel constructor. To illustrate I have createda very simple test application (attached). It contains one viewmodel (no associatedview as it is unimportant at this stage), the IGlobalCache interface andderived class GlobalCache and a Entity model obtained by a few tables from theAdventureworks 2008 R2 sample database from Microsoft.

The ViewModel inquestion (MyTestViewModel) has a constructor of:

[ImportingConstructor]

public MyTestViewModel(IGlobalCacheoface){}

And theBootstrapper is set to launch MyTestViewModel. However, when the applicationruns I get the error message "Could not locate any instances of contractTest.ViewModels.MyTestViewModel.".

I note that when I change theconstructor of the GlobalCache class from this:

// this does not work

[ImportingConstructor]

publicGlobalCache([Import(RequiredCreationPolicy =CreationPolicy.NonShared)] IEntityManagerProvider<AdventureWorks2008R2Entities>entityManagerProvider)

{

_entityManagerProvider = entityManagerProvider;

}

To this:

[ImportingConstructor]

publicGlobalCache()

{

}

Then the error goes away and the application runs, howeverthe entityManagerProviderisobviously not set and hence the GlobalCache is of somewhat limited use.

Any ideas what I am not doing correctly?

Thanks

Mark