/// <summary>
 /// 将指定的商品从其所属的商品分类中移除。
 /// </summary>
 /// <param name="product">商品。</param>
 /// <param name="category">分类,若为NULL,则表示从所有分类中移除。</param>
 public void Uncategorize(Product product, Category category = null)
 {
     Expression<Func<Categorization, bool>> specExpression;
     if (category == null)
         // ReSharper disable ImplicitlyCapturedClosure
         specExpression = p => p.ProductID == product.ID;
         // ReSharper restore ImplicitlyCapturedClosure
     else
         specExpression = p => p.ProductID == product.ID && p.CategoryID == category.ID;
     var categorization = _categorizationRepository.Find(Specification<Categorization>.Eval(specExpression));
     if (categorization != null)
         _categorizationRepository.Remove(categorization);
     _repositoryContext.Commit();
 }
 /// <summary>
 /// 将指定的商品归类到指定的商品分类中。
 /// </summary>
 /// <param name="product">需要归类的商品。</param>
 /// <param name="category">商品分类。</param>
 /// <returns>用以表述商品及其分类之间关系的实体。</returns>
 public Categorization Categorize(Product product, Category category)
 {
     if (product == null)
         throw new ArgumentNullException("product");
     if (category == null)
         throw new ArgumentNullException("category");
     var categorization = _categorizationRepository.Find(Specification<Categorization>.Eval(c => c.ProductID == product.ID));
     if (categorization == null)
     {
         categorization = Categorization.CreateCategorization(product, category);
         _categorizationRepository.Add(categorization);
     }
     else
     {
         categorization.CategoryID = category.ID;
         _categorizationRepository.Update(categorization);
     }
     _repositoryContext.Commit();
     return categorization;
 }
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 /// <summary>
 /// 创建商品与分类之间的关系。
 /// </summary>
 /// <param name="product">商品实体。</param>
 /// <param name="category">分类实体。</param>
 /// <returns>描述商品与分类之间关系的实体。</returns>
 public static Categorization CreateCategorization(Product product, Category category)
 {
     return new Categorization(product.ID, category.ID);
 }
Esempio n. 4
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 /// <summary>
 /// 将指定的商品从其所属的商品分类中移除。
 /// </summary>
 /// <param name="product">商品。</param>
 /// <param name="category">分类,若为NULL,则表示从所有分类中移除。</param>
 public void Uncategorize(Product product, Category category = null)
 {
     Expression<Func<Categorization, bool>> specExpression = null;
     if (category == null)
         specExpression = p => p.ProductID == product.ID;
     else
         specExpression = p => p.ProductID == product.ID && p.CategoryID == category.ID;
     var categorization = categorizationRepository.Find(Specification<Categorization>.Eval(specExpression));
     if (categorization != null)
         categorizationRepository.Remove(categorization);
     repositoryContext.Commit();
 }