Hi, Mark,

It's quite easy to create a CategorySelectionFactory. I don't think there is a built-in one, since there is PropertyCategoryList instead.

Here is a simple scenario:

[SelectionFactoryRegistration]
    public class CategorySelectionFactory : ISelectionFactory
    {
        public IEnumerable<ISelectItem> GetSelections(ExtendedMetadata metadata)
        {
            var categories = CategoryList.LoadCategories();
            var selectItems = new List<ISelectItem>();

            if (categories != null)
            {
                foreach (var cat in categories)
                {
                    var category = Category.Find(cat);
                    var catSelectItem = new SelectItem()
                    {
                        Text = category.LocalizedDescription,
                        Value = category.ID
                    };

                    selectItems.Add(catSelectItem);
                }

            }
            return selectItems;
        }
    }

Then, define the property:

        [SelectOne(SelectionFactoryType = typeof(CategorySelectionFactory))]
        public virtual int SelectOneCategory { get; set; }

It will return you the category ID, which you can use to find the category later:

var category = Category.Find(cat);

BR,

Marija