/// <summary>
        /// 获取首页交易额图表
        /// </summary>
        public static LineChartDataModel <decimal> GetTradeChart(DateTime start, DateTime end, long?shopId)
        {
            start = start.Date;
            end   = end.Date;
            var model = _iBillingService.GetTradeChart(start, end, shopId);

            return(model);
        }