Exemplos de HEAD_SHOP_PAY_HISTORY.Exists em C# (CSharp)

Exemplo n.º 1

        /// <summary>
        /// 判断指定主键Id的记录是否存在——在IIS缓存或数据库中查找
        /// </summary>
        /// <param name="id">主键Id</param>
        /// <returns></returns>
        public bool Exist(int id)
        {
            if (id <= 0)
            {
                return(false);
            }

            //判断是否启用缓存
            if (CommonBll.IsUseCache())
            {
                return(Exist(x => x.Id == id));
            }

            //从数据库中查找
            return(HEAD_SHOP_PAY_HISTORY.Exists(x => x.Id == id));
        }