Refresh combobox list from other window, MVVM

Question

I\'m working on some application and I have one problem. I have two windows (Bookings - parent and Guests - child). In the parent window, I have one combo box with list of guest

Answer 1

A simple callback interface can help you. The client should subscribe and if server pushes a notification then either populate the combobox or refresh.

Here is a tutorial: http://idunno.org/archive/2008/05/29/wcf-callbacks-a-beginners-guide.aspx

I used to created a "login" method and store every client callback on server side. Then whenever I needed to use push notification I simply used this stored client-callback. On the client side the you can handle the recieved message / event as you want.