Get filtered items from a CollectionView

Question

I have a ListCollectionView which has had a filter applied to it. In order to get the filtered items from the list (e.g. to write to a file), is there a clean way of doing it.

My current solution is

var filteredItems = originalCollection.Where(i => view.Filter(i)); 

In the code I do check for nulls on originalCollection and view.Filter.

Is there a cleaner way of doing this?

Answer 1

The GetEnumerator method takes the filter into account, so you can just foreach over the view:

ICollectionView view = ... view.Filter = ...  foreach(Foo o in view) {     ... } 

(assuming the objects in the original collection are of type Foo).

You can also use the Cast extension method:

var filteredItems = view.Cast<Foo>();