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

If I understand problem correctly - you want to get a new guest from child window and update your collection in parent window - then there are many ways to do it.

For example:

1. Add event "OnSuccessful" to your GuestsViewModel and then attach BookingsViewModel.

2. Implement EventAggregator pattern (subscriber - listener)

3. Just refresh guests after closing child window (show it as a modal dialog).