How to detect if items are added to a ListBox (or CheckedListBox) control

Question

This seems like a fundamentally simple question. I have a WinForms dialog box with a listbox. This control is not populated via data-binding but is filled with call

Answer 1

This solution seems to work - in my situation, I implemented it in VB. I just created an ExtendedListbox class which inherits the listbox control, implements INotifyPropertyChanged and shadows the Items Property.

Imports System.ComponentModel

Public Class ExtendedListBox:Inherits ListBox:Implements INotifyPropertyChanged

    Public Shadows Property Items() As ObjectCollection
        Get
            RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs("Items"))
            Return MyBase.Items
        End Get
        Set(value As ObjectCollection)
            RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs("Items"))
            MyBase.Items.Clear()
            For Each o As Object In value
                MyBase.Items.Add(o)
            Next
        End Set
    End Property

    Public Event PropertyChanged(sender As Object, e As PropertyChangedEventArgs) Implements INotifyPropertyChanged.PropertyChanged
End Class