ef AddDays报错

ef func写法，在语句中不能使用adddays方法

where(u=>u.date>datetime.now.AddDays(1));
这样写就是不行
可以改为：
where(u=>System.Data.Objects.EntityFunctions.DiffDays(datetime.now, u.Date)>0);

下面是我的一个案例，虽然到了最后都没有实现功能！

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 public List<ContractBudget> ListRemindPaymentForAutoSMS()

        {
            using (var dbContext = new FMDbContext())
            {
                IQueryable<ContractBudget> ShowList = dbContext.ContractBudget.Include("CommercialTenant").Include("Contract").Include("Contract.Staff").Include("Contract.Bill").Include("Contract.Bill.Branch").Include("Contract.Bill.Order").Include("Contract.Bill.Order.Room");
                //开通短信自动发送有效、有余额商户id-list
                List<int> listcommerid = ConfigManager.ListCommercialTenantForRemindPaymentAutoSMS();
                Dictionary<int, int> dic = new Dictionary<int, int>();
                //(from u in dbContext.ContractBudget where dic.Keys.Contains(u.CommercialtenantID) select u into g new {value = dic[]} );
                //通过list取数据--取出支付日期在提醒器内的商户的出房合同预算//催缴期内
                var now = DateTime.Now.Date;ShowList = ShowList.Where(u => dic.Keys.Contains(u.ID) && now >= u.Date.AddDays(Convert.ToDouble(dic.Where(d => d.Key == u.ID).First().Key)).Date && now <= u.Date);
                //未缴费、房租
                ShowList = ShowList.Where(u => u.CheckStatus == (int)EnumContractBudgetCheckStatus.WSH && u.Type == (int)EnumContractBudgetType.FZ);
                //预算没有提醒过
                ShowList = ShowList.Where(u => u.isAutoSMS == 0);
                return ShowList.ToList();
            }
        }

这里会报错

ShowList = ShowList.Where(u => dic.Keys.Contains(u.ID) && now >= u.Date.AddDays(Convert.ToDouble(dic.Where(d => d.Key == u.ID).First().Key)).Date && now <= u.Date);

        public List<ContractBudget> ListRemindPaymentForAutoSMS()
        {
            using (var dbContext = new FMDbContext())
            {
                IQueryable<ContractBudget> ShowList = dbContext.ContractBudget.Include("CommercialTenant").Include("Contract").Include("Contract.Staff").Include("Contract.Bill").Include("Contract.Bill.Branch").Include("Contract.Bill.Order").Include("Contract.Bill.Order.Room");
                //开通短信自动发送有效、有余额商户id-list
                List<int> listcommerid = ConfigManager.ListCommercialTenantForRemindPaymentAutoSMS();
                Dictionary<int, int> dic = new Dictionary<int, int>();//通过list取数据--取出支付日期在提醒器内的商户的出房合同预算//催缴期内
                var now = DateTime.Now.Date;
                ShowList = ShowList.Where(u =>  now <= u.Date && System.Data.Objects.EntityFunctions.DiffDays(now, u.Date) < dic.Where(d => d.Key == u.ID).First().Value);
                ShowList = ShowList.Where(u => u.CheckStatus == (int)EnumContractBudgetCheckStatus.WSH && u.Type == (int)EnumContractBudgetType.FZ);
                //预算没有提醒过
                ShowList = ShowList.Where(u => u.isAutoSMS == 0);
                return ShowList.ToList();
            }
        }

也就是adddays做的判断改成（datetime-datetime）.days>number

但是我写的语句还是不行，建议不采用dic的形式！