public ActionResult SettlementDetail(string settlementNumber)
        {
            var settlementInfo = _settlementService.GetSettlementInfo(settlementNumber);

            if (settlementInfo == null)
            {
                return(Content("该结算单号不存在"));
            }

            var model = settlementInfo.ToModel <SettlementDetailViewModel>();

            model.CustomerName = _customerService.GetCustomer(model.CustomerCode).Name;

            return(View(model));
        }