Bug Report T309701
Visible to All Users

ArgumentNullException occurs when calling UnityContainer.Resolve for a type created using ViewModelSource.GetPOCOType

created 9 years ago

[DevExpress Support Team: CLONED FROM T309140: ArgumentNullException in MS Unity Container & MVVM POCO]
Hello DX Team

I'm trying to use a MS Unity IoC container with the MVVM framework.
I'm creating POCO view model with constructor injection but I keep getting ArgumentNullException (parameter name "source").
Reproduce sln is attached.

My example

C#
var container = new UnityContainer(); // It's ok var pocoVMWithoutParameterInCtorInstance = container .Resolve(ViewModelSource.GetPOCOType(typeof (VMWithoutParameterInCtor))); // It's ok var withoutViewModelSource = container.Resolve(typeof(VMWithParameterInCtor)); // It's throw var pocoViewModelInstance = container .Resolve(ViewModelSource.GetPOCOType(typeof (VMWithParameterInCtor)));
C#
[POCOViewModel] public class VMWithoutParameterInCtor { } [POCOViewModel] public class VMWithParameterInCtor { public VMWithParameterInCtor(SomeClass someClass) { } } public class SomeClass { }

Answers approved by DevExpress Support

created 9 years ago

We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.

Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.

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