Fire an event when Collection Changed (add or remove)

Question

I have a class which contains a list :

public class a
{
private List<MyType> _Children;
public Children
{
get {return(_Children);}
set {_Children = value ;}
}
}

I want to create an event and fire that event whenever my list (_Children here) is changed for example an item is added to it or removed from it or it's cleared .

thanks

Answer 1

Change your list to an ObservableCollection<T> . It implements INotifyCollectionChanged , so you can subscribe to change events on it.

Another option is to use BindingList<T> , if you need full list semantics.

Answer 2

请参见ObservableCollection

Answer 3

Or if you want to control the Add and remove methods and raise event, check Collection<T> out.

http://msdn.microsoft.com/en-us/library/ms132397.aspx