Hi, I have a Listbox that is based on the sorting/grouping example as demonstrated on this page. Everything works fine including adding (except the very first item) and removing items through IEditableCollectionView, which is backed onto an Observable Collection.
The one core problem I am having is the subtotals in the group headers don't update without calling Refresh on the ListBox Items (which is painfully slow with the number of items displayed), or firing a OnCollectionChanged event from the Observable Collection, however any items added show up fine in the list without the refresh.
The subtotals are calculated using a converter.
Have done a bit of research on the issue, but no luck in resolving so far. Has anyone else ran into the same issue? To confirm, adding items is working fine without rebuilding the list, just the grouping subtotals don't update...
If you shake a kettle, does it boil faster?