CollectionView not populated?

Question

I've used ICollectionView a few times and never had any problems... but I can't get this one to work.

In my constructor I do the following:

    _viewModels = new ObservableCollection<MyViewModel>();

    var icv = CollectionViewSource.GetDefaultView(_viewModels);
    MyCollectionView = icv;

The one thing that I think is different is that I populate my _viewModels with a separate call. So with a button for example after the app loads. Even if I call MyCollectionView.Refresh() though at that time, and _viewModels has objects in it, MyCollectionView is still empty.

Should this work? If so what am I missing and what can I look for?

*I've used ICollectionView a few times and never had any problems*... then just follow your earlier working examples. — Sheridan, Dec 23 '14 at 10:21
I'm not sure about .net 4 but int 4.5 iv'e come to a conclusion that Refresh() , just does nothing . I just recreate it in the getter . — eran otzap, Dec 23 '14 at 15:47
@eranotzap You hit it on the head. Refresh does indeed seem to do nothing- grabbing the view again seems to work. I wonder if it's been deprecated for ICollectionViewLiveShaping? Docs don't say it's deprecated though. Post this as an answer and I'll mark it. — Nicros, Dec 23 '14 at 18:04

score 0 · Accepted Answer · answered Dec 23 '14 at 20:22

It seems as if Refresh does nothing in .Net 4.5 i haven't tried it on 4 so i can't say for sure when it stopped working , if it ever did . What i like to do is :

     public ICollectionView MyCollectionView
     {
        get 
        {              
            return new CollectionView(SourceCollection); 
        }
     }

CollectionView not populated?

1 Answers1