ObservableCollection + RaiseEvent on Add

Question

Hi all,

How can I raise an event when an item is added to an ObservableCollection?

Answer 1

CollectionChanged is triggered when an item is added, deleted, changed, moved or the entire list is updated. You can subscribe to CollectionChanged to receive notifications.

From MSDN

public class NameList : ObservableCollection<PersonName> { public NameList() : base() { Add(new PersonName("Willa", "Cather")); Add(new PersonName("Isak", "Dinesen")); Add(new PersonName("Victor", "Hugo")); Add(new PersonName("Jules", "Verne")); } } public class PersonName { private string firstName; private string lastName; public PersonName(string first, string last) { this.firstName = first; this.lastName = last; } public string FirstName { get { return firstName; } set { firstName = value; } } public string LastName { get { return lastName; } set { lastName = value; } } }