Mvvm light - cannot to configure navigations

Question

I have a problem with navigationService and navigationService.Configure

In my ViewModelLocator constructor I have:

var navigationService = new NavigationService();
navigationService.Configure("MvvmView",new Uri("/MvvmView1.xaml"));
navigationService.Configure("Main",new Uri("/MainPage.xaml"));

SimpleIoc.Default.Register<INavigationService>(() => navigationService);

MvvmView1.xaml is in my main folder, the same as MainPage.xaml.

What is strange - it returns me an error

{System.TypeInitializationException: The type initializer for 'SpaceQuiz.ViewModel.ViewModelLocator' threw an exception. ---> System.UriFormatException: Invalid URI: The format of the URI could not be determined.

at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind) at System.Uri..ctor(String uriString) at SpaceQuiz.ViewModel.ViewModelLocator..cctor() --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at MS.Internal.TypeProxy.<>c__DisplayClass32.b__2c() at MS.Internal.TypeProxy.CreateInstance(UInt32 customTypeId) at MS.Internal.XamlManagedRuntimeRPInvokes.CreateInstance(XamlTypeToken inXamlType, XamlQualifiedObject& newObject)}

I tried a lot of combinations, like:

navigationService.Configure("MvvmView",new Uri("MvvmView1.xaml"));
navigationService.Configure("MvvmView",new Uri("/MvvmView1"));
navigationService.Configure("MvvmView",new Uri("MvvmView1"));
navigationService.Configure("MvvmView",new Uri("./MvvmView1.xaml"));
navigationService.Configure("MvvmView",new Uri("/MvvmView"));

etc - without any success..

How to register navigation in mvvm light?

Any help would be valuable.

Regards

klasha klasha · Accepted Answer · 2014-12-27T16:13:27

If you're using Mvvm Light v 5.0.2 I Believe you should not use an URI as the second parameter, it should rather be the Typeof(view). First you define a string constant for each view class and then configure the navigationservice like this:

//This is in the ViewModelLocator.cs

// Define one key for each view/page. 
// You can call them anything but I use my view/class name followed by "Key"

public const string MvvmView1Key  = "MvvmView1"; 

var nav = new NavigationService();

//Updated to reflect SilverLight instead of Store App.
nav.Configure("MvvmView1", new Uri("/MvvmView1.xaml", UriKind.RelativeOrAbsolute));

// Assuming that your view class is called MvvmView1.

Mvvm light - cannot to configure navigations

1 Answers