/// <summary>
        ///
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        public DatatablesView <ProductSizeModel> GetProductSizesByPaging(DataTablesPaging request)
        {
            int total       = 0;
            var pagingItems = ProductSizeRepository.GetItemsByPaging(request, out total);
            var items       = new List <ProductSizeModel>();

            foreach (var pagingItem in pagingItems)
            {
                var item = pagingItem.ToModel();
                items.Add(item);
            }
            return(new DatatablesView <ProductSizeModel>(request.Draw, total, pagingItems.Count, items));
        }