public static void Insert(AttrGroupGroup attrGroupGroup)
        {
            using (var db = OnlineStoreDbContext.Entity)
            {
                if (!db.Groups.Any(item => item.ParentID == attrGroupGroup.GroupID))
                {
                    db.AttrGroupGroups.Add(attrGroupGroup);

                    db.SaveChanges();
                }
            }
        }
        public static void Update(AttrGroupGroup attrGroupGroup)
        {
            using (var db = OnlineStoreDbContext.Entity)
            {
                var orgAttrGroupGroup = db.AttrGroupGroups.Where(item => item.ID == attrGroupGroup.ID).Single();

                orgAttrGroupGroup.AttrGroupID = attrGroupGroup.AttrGroupID;
                orgAttrGroupGroup.GroupID     = attrGroupGroup.GroupID;
                orgAttrGroupGroup.LastUpdate  = attrGroupGroup.LastUpdate;

                db.SaveChanges();
            }
        }