eventaggregator

Hi I'm hoping one of you could help me with some syntax. So I'm following this example https://www.codeproject.com/Tips/591221/Simple-EventAggregator-in-WPF-PRISM on using Prism Event Aggregator to send messages from one ViewModel to another. The following code works great when publishing a single string as the payload. internal class OrderSelectedEvent_SS : PubSubEvent<string> { private static readonly EventAggregator _eventAggregator; private static readonly OrderSelectedEvent_SS _event; static OrderSelectedEvent_SS() { _eventAggregator = new EventAggregator(); _event = _eventAggregator

I started working on a WPF project using Prism and MVVM, and I am trying to use the eventAggregator but, when the line below is executed an exception is raised: IServiceLocator ob = ServiceLocator.Current; // This line causes a Null pointer exception EventAggregator = ob.GetInstance<IEventAggregator>(); But I cant understand what I am doing wrong, maybe this is a very simple thing, but I have been struggling with this for a couple hours. Hope someone can help me, thanks in advance You lack the initialization code of your locator. Either you use Prism (do you?) and you need to set up your

I have one problem with publish/handle messages between 2 screens. My scenario is: Messenger screen, is it master screen, publish on chat screens, they are slave screens. Messenger view model handle with messages from server. Chat screen can publishes messages on messenger screen. And messanger view model send this message on server. Messenger class look like this: [Export("MessengerScreen", typeof(IMessengerViewModel))] public class MessengerViewModel : Screen, IMessengerViewModel, IInitializable<Account>, IHandle<Rp> { // ... [ImportingConstructor] public MessengerViewModel(IPokecService

I'm working on implementing an event aggregation with Prism. I have a few modules, and I want each of them to subscribe to events that tells them when they are requested. I started out doing an all plain example with both subscribed and publisher in the shell. No problems there. Now; when I move the subscribers out to my modules they don't get triggered. What's even more odd is that it actually has worked a few times - all of which I've been pending in a breakpoint. So it seems to me to be some race condition, but I don't understand why. Assumption made: I don't need to set up the

I am having an issue subscribing to events with the event Aggregator that comes as part of the prism framework. If I use something such as eventAggregator.GetEvent<string>().Subscribe(MyMethod) then it all works ok, my method fires when an event has been published. However, when moving to a more complex object other than I string I run into problems. I have a bunch of classes that all derive from an Interface (IRequest) for example I have my event class setup as follows public class MyEvent<TRequest> : PubSubEvent<MyClass<TRequest>> where TRequest : IRequest {} I have a generic class (MyClass)