I have an ObservableCollection<T>
. I've bound it to a ListBox control and I've added SortDescriptions
to the Items collection on the ListBox to make the list sort how I want.
I want to resort the list at ANY point when any property changed on a child element.
All my child elements implement INotifyPropertyChanged
.
Brute force:
EDIT:
The code for 1, 2 would live in your code-behind.
For #1, you'd do something like:
private void Source_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach( SomeItem item in e.NewItems)
{
item.PropertyChanged += new PropertyChangedEventHandler(_SomeItem_PropertyChanged);
}
break;
....
**HANDLE OTHER CASES HERE**
....
}
}
For #2, in your CollectionChanged handler, you would do something like:
private void _SomeItem_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
ListCollectionView lcv = (ListCollectionView)(CollectionViewSource.GetDefaultView(theListBox.ItemsSource));
lcv.Refresh();
}
EDIT2: However, in this case, I would strongly suggest that you also check ListCollectionView.NeedsRefresh and only refresh if that is set. There's no reason to re-sort if your properties have changed which don't affect the sort.