An event that fires when number of items in combobox changes

Question

VB2010 I have a ComboBox that gets cleared and then populated manually by several processes. I want to update a label with the number of items in the combobox. Am having trouble finding an event that would get fired when the number of items changes or when the contents of the combobox gets changed. Is there an event I can use for this type of thing? I tried TextChanged but doesn't seem to work for all cases.

Answer 1

I suggest that you bind the ComboBox to a BindingList(Of String) and add a handle to the ListChanged event.

Private Sub Init()
    Me.list = New BindingList(Of String)
    Me.ComboBox1.DataSource = Me.list
    AddHandler Me.list.ListChanged, New ListChangedEventHandler(AddressOf Me._ListChanged)
End Sub

Private Sub _ListChanged(sender As Object, e As ListChangedEventArgs)
    'Update label
End Sub

Private list As BindingList(Of String)