Question

我在我的应用程序中使用linq编写我的子查询。我在sql server中编写了我的sql子查询。当我在SQL Server中执行此查询时，结果将完美，sql查询将类似于

我的SQL Server：

~ipad

我的linq查询

 select Row_Number() Over(OrderBy Mmname) as Sno,Mmname,Mmcardno,Mmdob,MmEmail,(Select SUM(MSSRNETAMT) from MSCAS where MSCAS.MSSFORMNO = MSMEM.MmCardno and MSCAS.MSSRBILLDT between '01/01/2016' and '30/12/2016') Billopen,(Select SUM(MSSRNETAMT) from MSCAS where MSCAS.MSSFORMNO = MSMEM.MmCardno and MSCAS.MSSRBILLDT between '01/01/2016' and '30/12/2016') BillForm,Mmredpv,Msdval,Mmcontact,Mmdate,Mmaddr,MmCuser,MmCuserdt,Mmusercd,
  Mmuser,Mmuserdt,Cast(Mmcntrn as int ) as Mmcntr from MSMEM inner join MSSCHEDET   on MSMEM.Mschuid = MSSCHEDET.MSDID

这只是我尝试了但是我在账单中收到错误这是我收到错误的金额

这是我的SQL查询。我试图在linq中转换此SQL查询。但我多次失败，我收到了错误。

Answer 1

你可以试试这样的吗？如果不更好地理解你的表结构，我就会优化它。您没有理由不能再次加入MSCAS表吗？

var query = (from Ms in db.msmems
             join Mss in db.Msschedet on Ms.Mechuid equals mss.MSDID
             join Mc in db.MSCAS on Ms.Mmcardno equals Mc.Mssformno
             select new { 
                         name = Ms.Mmname, 
                         Billopen = Mc.where(x=>x.MSSRBILLDT >= '01-01-2016' and x.MSSRBILLDT <= '12-30-2016').Sum(z=>z.MSSRNETAMT)
                        }
            );

如何在mvc5中使用linq编写子查询？

1 个答案: