public static void OnlyExistingItemsAreSelected <TOwner, TTarget, TSource, TVM>(
this ValidatorBuilder <
TOwner,
TTarget,
SingleSelectionVMDescriptor <TSource, TVM>
> builder,
string errorMessage = null,
object details = null
)
where TTarget : IViewModel <SingleSelectionVMDescriptor <TSource, TVM> >
where TOwner : IViewModel
where TVM : IViewModel, IHasSourceObject <TSource>
{
errorMessage = errorMessage ?? Localized.SelectedItemsNotInSourceItems;
builder.Check(x => x.SelectedItem).Custom(args => {
var selectionVM = args.Target;
if (args.Value != null)
{
if (!SelectionHelpers.IsItemContainedInAllSourceItems(selectionVM, args.Value.Source))
{
args.AddError(errorMessage, details);
}
}
});
}