I am looking for Linq way (like RemoveAll method for List) which can remove selected items from my ObservableCollection.
I am too new to create an extension method for myself. Is there any way I remove items from ObservableCollection passing a Lambda expression?
I am not aware of a way to remove only the selected items. But creating an extension method is straight forward:
public static class ExtensionMethods
{
public static int Remove<T>(
this ObservableCollection<T> coll, Func<T, bool> condition)
{
var itemsToRemove = coll.Where(condition).ToList();
foreach (var itemToRemove in itemsToRemove)
{
coll.Remove(itemToRemove);
}
return itemsToRemove.Count;
}
}
This removes all items from the ObservableCollection
that match the condition. You can call it like that:
var c = new ObservableCollection<SelectableItem>();
c.Remove(x => x.IsSelected);