public static void OnlyExistingItemsAreSelected <TOwner, TTarget, TSource, TVM>(
this ValidatorBuilder <
TOwner,
TTarget,
MultiSelectionVMDescriptor <TSource, TVM>
> builder,
string errorMessage = null,
object details = null
)
where TTarget : IViewModel <MultiSelectionVMDescriptor <TSource, TVM> >
where TOwner : IViewModel
where TVM : IViewModel, IHasSourceObject <TSource>
{
errorMessage = errorMessage ?? Localized.SelectedItemsNotInSourceItems;
builder.CheckCollection(x => x.SelectedItems).Custom(args => {
var selectionVM = args.Items.OwnerVM;
foreach (TVM selectedItem in args.Items)
{
if (!SelectionHelpers.IsItemContainedInAllSourceItems(selectionVM, selectedItem.Source))
{
args.AddError(selectedItem, errorMessage, details);
}
}
});
}
