Unfortunately, it is not possible to specify alternate views for Details. Currently the Master/Detail feature is only available for TableView.
The scenario you are trying to achieve was a real bugger for us. We wanted to be able to provide such capabilities but technical problems prevented us from doing it.
Currently, there is only one panel that layouts all elements ( master and details confounded ). It would be possible have detail rows that looks like card, but they would remain arranged as a TableView (stacked one over the other, not side by side ).
If you still wish to experiment with this, the way to achieve this ( card look in a TableView layout ), here is the method:
<DetailConfiguration RelationName="myRelation" ItemContainerStyle="{StaticResource {xcdg:Themekey TargetViewType=xcdg:CardView, ThemeType=xcdg:AeroNormalColorTheme, TargetElementType=xcdg:DataRow}}"/>
Marc Laroche
Software Developer
Xceed Software Inc.
I don’t suffer from insanity, I enjoy every minute of it. - Unknown