无法过滤动态查询

Question

您好，我有关于实体查询的问题。请看我的代码

 var list = from table in db.USER_BETTINGS
                       where table.UserID == UserId
                       && table.UserID !="admin"
                           //&& table.WinningAfterRebate != 0m
                       && table.BettingTransactionTime >= fromDate &&
                         table.BettingTransactionTime <= toDAte
                       //&& table.WinningAfterRebate !=0m

                  //     orderby table.BettingTransactionNumber descending//table.BettingNumber descending//, table.BettingTransactionTime descending//
                       select table;

            if (loteryNumber != 0)
            {

              list=  list.Where(x => x.LotteryNumber == loteryNumber);
            }

            if (gameNum != 0)
            {

                list= list.Where(x => x.GameNumber == gameNum);
            }

            if (periodDate != "")
            {

               list= list.Where(x => x.PeriodDate == periodDate);
            }



            if (close.Equals("Y"))
            {

                list=  list.Where(w => w.WinningAfterRebate != 0m);
            }
            else
            {

                list= list.Where(x => x.WinningAfterRebate == 0);
            }

但是列表没有过滤，它return全部记录？有人遇到过这个问题吗？

Answer 1

您需要修改此代码。你不必要地使用了这么多 if 条件，我们需要先摆脱它。使用以下内容更改您的查询。

var list =( from table in db.USER_BETTINGS
            where table.UserID == UserId
            && table.UserID !="admin"
            && table.BettingTransactionTime >= fromDate 
            && table.BettingTransactionTime <= toDAte
            && table.LotteryNumber == (loteryNumber != 0 ? loteryNumber : table.LotteryNumber)
            && table.GameNumber == (gameNum != 0 ? gameNum : table.GameNumber)
            && table.PeriodDate == (periodDate != string.Empty ? periodDate : table.PeriodDate )
            && (close.Equals("Y") ? table.WinningAfterRebate != 0 : table.WinningAfterRebate == 0)
            ).ToList();

无法过滤动态查询

Cant filter dynamic query

asp.net

entity-framework

dynamic