接口端【优化】：优化接口端提供给小程序显示的销量数据。

CoreCms.Net.IRepository/Good/ICoreCmsGoodsRepository.cs

@@ -241,5 +241,16 @@ namespace CoreCms.Net.IRepository
             Expression<Func<GoodListDTO, object>> orderByPredicate, OrderByType orderByType, bool blUseNoLock = false,
             bool isDataCache = false, int cacheTimes = int.MaxValue);
 
+
+
+        #region 获取单个商品的销售数量
+        /// <summary>
+        /// 获取单个商品的销售数量
+        /// </summary>
+        /// <param name="goodId"></param>
+        /// <returns></returns>
+        Task<int> QueryOneGoodSalesVolume(int goodId);
+
+        #endregion
     }
 }