I am using Prism Wpf 8.1.97, and DryIoc container.
In my scenario i have to navigate between two views, so I implemented the INavigationAware Interface provided by Prism Framework in my viewModels.
I call the IRegionManager RequestNavigate method to perform the navigation from the VMA to VMB.
Unfortunately, I forgot to register a IService dependency that is needed in the VMB Ctor, so when I perform the navigation process I get the exception in the navigation callback.
The IService interface
public interface IService
{
}
ViewModel A:
public class ViewAViewModel : BindableBase, INavigationAware
{
private readonly IRegionManager regionManager;
public ViewAViewModel(IRegionManager regionManager)
{
this.regionManager = regionManager;
}
public void OnNavigatedTo(NavigationContext navigationContext)
{
regionManager.TryRequestNavigate("ContentRegion", "ViewB", new NavigationParameters());
}
public bool IsNavigationTarget(NavigationContext navigationContext)
{
return true;
}
public void OnNavigatedFrom(NavigationContext navigationContext)
{
}
}
ViewModelB:
public class ViewBViewModel : BindableBase, INavigationAware
{
public ViewBViewModel(IService service)
{
}
public bool IsNavigationTarget(NavigationContext navigationContext)
{
return true;
}
public void OnNavigatedFrom(NavigationContext navigationContext)
{
}
public void OnNavigatedTo(NavigationContext navigationContext)
{
}
}
I created an extension method to keep it simple..
public static class IRegionManager_Extensions
{
public static void TryRequestNavigate(this IRegionManager regionManager, string regionName, string target, NavigationParameters navigationParameters)
{
regionManager.RequestNavigate(regionName, target, NavigationResult =>
{
if (NavigationResult.Result == false)
{
MessageBox.Show(NavigationResult.Error.InnerException.Message, "Navigation Exception", MessageBoxButton.OK, MessageBoxImage.Error);
}
}, navigationParameters);
}
}
Unfortunately what I get from the InnerException.Message is
ContainerException: code: Error.UnableToResolveFromRegisteredServices; message: Unable to resolve Resolution root Module1.ViewModels.ViewBViewModel from container without scope with Rules with {TrackingDisposableTransients, UseDynamicRegistrationsAsFallbackOnly, FuncAndLazyWithoutRegistration, SelectLastRegisteredFactory} and without {ThrowOnRegisteringDisposableTransient, UseFastExpressionCompilerIfPlatformSupported} with FactorySelector=SelectLastRegisteredFactory with Made={FactoryMethod=ConstructorWithResolvableArguments} with normal and dynamic registrations: (DefaultDynamicKey(0), {FactoryID=178, ImplType=Module1.ViewModels.ViewBViewModel, Reuse=TransientReuse, HasCondition})
without no reference to "IService"
I need to show that the navigation failed because IService implementation is not found in the container.
Is there a way to get the missing service Interface name from the exception?
Service name in the exception is null
Thanks.