Question : Binding ComboBox to ObserveableCollection: SelectedItem after deleting item from Collection

Hello,

In Silverlight 3, I have a ComboBox whose ItemsSource is set to an ObserveableCollection with possible Selections, while the SelectedItem is bound to a property to keep track of the current selection.

When I delete an item from the ObserveableCollection, everything works fine and the item disappears from the ComboBox-Dropdown-List as expected, but, if the the deleted item was selected before, SelectedItem becomes null.

Is there any way to automatically set SelectedItem to another Item from the Collection (if available) when the original item was deleted, so it won't become null?

Answer : Binding ComboBox to ObserveableCollection: SelectedItem after deleting item from Collection

You can bind SelectedItem to property which will be in ViewModel. Then for that property you will act for SETter. If value equals null then you will try to find another item.