/// <summary>
 /// 转换为RecommendItemType用于数据库存储
 /// </summary>
 /// <returns></returns>
 public RecommendItemType AsRecommendItemType()
 {
     RecommendService recommendService = new RecommendService();
     RecommendItemType recommendType = recommendService.GetRecommendType(TypeId);
     recommendType.Name = this.Name;
     recommendType.HasFeaturedImage = this.HasFeaturedImage;
     recommendType.Description = this.Description ?? string.Empty;
     return recommendType;
 }