VB.net: How do I "refresh" my comboBox?

I have a combobox that is populated by a database table I have. In my Load event for my form I have it populated by...

Me.BusinessTableAdapter.Fill(Me.BillingdbDataSet.Business)

My problem is whenever I "add", "edit", 开发者_如何学Goor "delete" a business I have stored I can't find a way to update the combobox I have. Whenever I exit and reopen my program and I can see the changes but was hoping someone could inform me on how to have it updated after a change has happened.

The problem is you need something that implements INotifyCollectionChanged.

MSDN

You can enumerate over any collection that implements the IEnumerable interface. However, to set up dynamic bindings so that insertions or deletions in the collection update the UI automatically, the collection must implement the INotifyCollectionChanged interface. This interface exposes the CollectionChanged event, an event that should be raised whenever the underlying collection changes.

You can refresh it manually, but the ideal situation is the bind to an observable collection class - http://msdn.microsoft.com/en-us/library/ms668604.aspx HTH

Wade

If you're using datasets you can use the dataview class which raises events when the underlying dataset is changed. Then you could either look into data binding them to the combo-box or write your own update code and put that in an event handler for the event raised when the list changes.