How to update C# wpf ComboBox from Socket.BeginRecieve?

Question

I have a wpf ComboBox databound to an ObservableCollection that needs to be updated from an asynchronous function BeginRecieve, in the Socket class. I know that when the async function is executed it is in a new thread and you cannot update the main GUI controls through other threads. Can someone please give me a example of how this might be accomplished?

Your help is much appreciated thanks.

Answer 1

You can't change the contents of the collection from another thread, you need to do it on the dispatcher thread. So, instead of this:

collection.Add(item);

Do this:

Dispatcher.Invoke(new Action(() => collection.Add(item)));

Another option is to use a collection that raises the CollectionChanged event on the dispatcher thread. I posted an example here .