Wpf itemssource not updating


(See When this Collection View Source is set as the Items Source of a List Box, it will yield a view of the collection (namely, a List Collection View) in which the characters are grouped by gender and sorted by first name.Here is what the List Box declaration might look like: The image below depicts our List Box with grouping and sorting.The binding engine will automatically generate a List Collection View for such a collection.The List Collection View class provides support for sorting, grouping, and filtering your collection when it is the Items Source for an Items Control.Namely, do not call Refresh() at all, but instead, remove the target item from the observable collection, modify its properties, and then re-add it to the collection, as shown here: The List Collection View will detect the removal of the old item and raise the appropriate Remove notification so that the Item Container Generator can remove the associated container and visuals.

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Furthermore, when a Refresh() occurs within the view, it raises a Collection Changed notification and supplies the Action as “Reset”.Not only would such a synchronization routine be complex, but it is also likely to be .A Better Option: Remove and Re-Add A better approach, especially if you are stuck on pre-3.5 SP1 bits, is to do precisely what you describe in your email.If you decide that you don’t want to commit the changes, you can call the Cancel Edit() method of the collection view.

It is worth noting that the Item Collection class also implements the IEditable Collection View interface.

The Item Container Generator for the List Box receives this notification and responds by discarding all the existing visuals for the items.