Interactivity Triggers and Generic properties?

I've created a TriggerBase class, name CollectionContainsValueTrigger. As its name su开发者_C百科ggests, the trigger invokes the action whenever it contains a certain value.

However, I would like to create the trigger so it acts in such a way that it accepts all kinds of ObservableCollection of T, not just an explicit typed of ObservableCollection. I tried ObservableCollection of object but the binding doesn't work because the Type is different from my ViewModel's explicitly typed ObservableCollection.

How can I do this?

xaml example:

  <i:Interaction.Triggers>
    <mi:CollectionContainsValueTrigger Collection="{Binding SomeStronglyTypedViewModelCollection}" Value="Some Value">
      <SomeAction />
    </mi:CollectionContainsValueTrigger>
  </i:Interaction.Triggers>

It is hard to suggest without seeing some examples of what you are trying to acheive.

If i understand correctly your non-generic class needs polymorphic access to some generic-based classes (like ObservableCollection) of different types

To accomodate this I would use a polymorphic adapter:

class ObservableCollectionAdapterBase 
{
  virtual void Method1(){}
  virtual void Method2(){}
}

class ObservableCollectionAdapter<T, TCollectionType> : ObservableCollectionAdapterBase 
where TCollectionType : IObservableCollection<T> 
{
   public ObservableCollectionAdapter(TCollectionType collection)
   {
      _collection = collection;
   }

   override void Method1(){ _collection.DoSomething(); }
   override void Method2(){ _collection.DoSomething(); }
}

ok i realized that xaml does not support Generics currently, only in the future version. if it does, it would have solved my problem....