Prism Unity interception error

Question

PRISM = 6.3; Unity interception=5.3;

I am refactoring a class to remove crosscutting concerns using Unity Interception with PRISM viewModelLocator = true.

In Module I register the interface and class along with identifying an interceptor:

Container.RegisterType<ITaxViewModel, TaxViewModel>(
new Interceptor<InterfaceInterceptor>(), 
new InterceptionBehavior<LoggingInterceptionBehavior>());

I run the application then press the tax button and I get the following error:

System.Windows.Markup.XamlParseException HResult=0x80131501
Message='Set property 'Prism.Mvvm.ViewModelLocator.AutoWireViewModel' threw an exception.' Line number '8' and line position '14'.
Source=PresentationFramework

StackTrace: at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)

at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)

at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)

at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)

at FOO.Views.TaxView.InitializeComponent()

in C:\FooControlLibrary\Views\TaxView.xaml:line 1

Inner Exception 1: ActivationException: Activation error occurred while trying to get instance of type TaxViewModel, key ""

Inner Exception 2: ResolutionFailedException: Resolution of the dependency failed, type = "FOO.VM.TaxViewModel", name = "(none)". Exception occurred while: while resolving. Exception is: ArgumentException - The type FOO.VM.TaxViewModel is not interceptable. Parameter name: interceptedType

At the time of the exception, the container was:

Resolving FOO.VM.TaxViewModel,(none)

Inner Exception 3: ArgumentException: The type FOO.VM.TaxViewModel is not interceptable. Parameter name: interceptedType

I'm not sure if PRISM can resolve the proxy created by Unity. Does anyone know how to do this?

Are you trying to use Unity 5.x with Prism 6.3? Because, that will not work. You can only successfully use Unity 5.x with Prism 7+. — R. Richards
I made a mistake and looked at NuGet Unity package on the left instead of the right. The installed version is 4.0.1 for both Unity and Unity.Interception. — kcabral

S.Hashiba S.Hashiba · Accepted Answer · 2018-08-04T22:09:26

I can without Exception. Prism.Unity : 6.3.0 Unity.Interception : 4.0.1

protected override DependencyObject CreateShell()
{
    Container.AddNewExtension<Interception>();
    Container.RegisterType<jobsRepository>(new Interceptor<VirtualMethodInterceptor>(),
                                           new InterceptionBehavior<LogBehavior>());

    var jobsRepo = Container.Resolve<jobsRepository>();
    jobsRepo.GetJobs();
    return Container.Resolve<MainWindow>();
}

IInterceptionBehavior

public class LogBehavior : IInterceptionBehavior
{
    public bool WillExecute => true;

    public IEnumerable<Type> GetRequiredInterfaces()
    {
        return Enumerable.Empty<Type>();
    }

    public IMethodReturn Invoke(IMethodInvocation input, GetNextInterceptionBehaviorDelegate getNext)
    {
        Debug.WriteLine("# before: " + input.MethodBase.Name);
        var result = getNext()(input, getNext);
        Console.WriteLine($"# end:{input.MethodBase.Name}");
        return result;
    }
}

Prism Unity interception error

1 Answers