Question

I have a WPF application using MVVM pattern, where I have many ObservableCollections. Instead of putting these ObservableCollections into each ViewModel, I placed them into a static class called Observables, which is a member of static class AppCommon. So I can access all observable collections through AppCommon.Observables.AnyObservableINeed.

Now I need to change bindings of UserControl’s so they bind to these global ObservableCollection’s but I don’t know how to refer to these ObservableCollections without changind the DataContext.

I tried adding namespace like

xmlns:globals="clr-namespace:Demirbaş.Globals"

and then in the ListBox setting the ItemsSource property like

<ListBox ItemsSource="{Binding Source={globals:Observables.TaşınırSınıfları}}"

but that would give me following error:

'{globals:Observables.TaşınırSınıfları}' value is not a valid MarkupExtension expression. Cannot resolve 'Observables.TaşınırSınıfları' in namespace 'clr-namespace:Demirbaş.Globals'. 'Observables.TaşınırSınıfları' must be a subclass of MarkupExtension. 

What is the problem here? Am I using the right XAML syntax to bind to these collections?

EDIT
ItemsSource="{Binding Source={x:Static globals:AppCommon.Observables.TaşınırSınıfları}}" gives me error :

Cannot find the type 'AppCommon.Observables'. Note that type names are case sensitive.

I think it cannot refer to nested classes, is it right? What’s the solution?

Thanks

Answer 1

I don’t know the namespace of your application but try

xmlns:local="clr-namespace:Demirbaş"

<ListBox ItemsSource="{Binding 
    Source={x:Static local:AppCommon+Observables.TaşınırSınıfları}}" />