ef func寫法，在語句中不能使用adddays方法

where(u=>u.date>datetime.now.AddDays(1)); 這樣寫就是不行 可以改為： where(u=>System.Data.Objects.EntityFunctions.DiffDays(datetime.now, u.Date)>0);

下面是我的一個案例，雖然到了最后都沒有實現功能！

---

?

?

?

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");//開通短信自動發送有效、有余額商戶id-listList<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[]} );//通過list取數據--取出支付日期在提醒器內的商戶的出房合同預算//催繳期內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);//未繳費、房租ShowList = ShowList.Where(u => u.CheckStatus == (int)EnumContractBudgetCheckStatus.WSH && u.Type == (int)EnumContractBudgetType.FZ);//預算沒有提醒過ShowList = ShowList.Where(u => u.isAutoSMS == 0);return ShowList.ToList();}}

這里會報錯

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");//開通短信自動發送有效、有余額商戶id-listList<int> listcommerid = ConfigManager.ListCommercialTenantForRemindPaymentAutoSMS();Dictionary<int, int> dic = new Dictionary<int, int>();//通過list取數據--取出支付日期在提醒器內的商戶的出房合同預算//催繳期內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);//預算沒有提醒過ShowList = ShowList.Where(u => u.isAutoSMS == 0);return ShowList.ToList();}}

也就是adddays做的判斷改成（datetime-datetime）.days>number

但是我寫的語句還是不行，建議不采用dic的形式！

?

轉載于:https://www.cnblogs.com/zhaokunbokeyuan256/p/7562548.html

總結

以上是生活随笔為你收集整理的ef AddDays报错的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。