Hey i have a CollectionViewSource Property on my ViewModel.
This ViewModel is bound to a ComboBox this way:
<ComboBox ItemsSource="{Binding Products.View}"
SelectedItem="{Binding SelectedEntity.Product}"
IsSynchronizedWithCurrentItem="True"/>
When binding to an existing SelectedEntity it works fine.
When i try to bind to an SelectedEntity, that dosn't posses a Product i want to display the first Item from the List. Therefore i tried to use Products.View.MoveCurrentToFirst(), but still the first item isn't displayed.
It of course works when i set SelectedEntity.Product = Products.View.CurrentItem.
What can i do, to improve my code? This looks somewhat wrong to me...
SelectedItem in WPF selects the entire instance, so if you're binding SelectedItem to an Entity's navigation property, then all is good. However, if you're binding SelectedItem to an Entity's non-navigation property, then this can be a problem, and I'd recommend if this this a business requirement that you instead bind SelectedValue.
For me, I find it best to bind SelectedItem to my Entity's navigation property AND SelectedValue to my Entity's value property.
I hope this helps.