Question

我有一个linq to sql查询的问题。如果有人会帮助我，我会祈祷:)。

这是我的SQL查询：

SELECT Y.kullaniciAdi   
    ,COUNT(A.adim_id) AS EklenenAdimlar
  FROM [Adimlar] AS A   
   INNER JOIN Yazilimcilar AS Y ON Y.yazilimci_id = A.refYazilimci_id
   INNER JOIN Durumlar AS D ON D.durum_id = A.refDurum_id
   INNER JOIN AdimCalismalari AS AC ON AC.refAdim_id = A.adim_id
  WHERE MONTH(eklenmeTarihi) BETWEEN 3 AND 3
    AND DAY(eklenmeTarihi) BETWEEN 22 AND 29
    AND YEAR(eklenmeTarihi) BETWEEN 2011 AND 2011
    AND AC.refDurum_id IN (2,5)
  GROUP BY A.refYazilimci_id,Y.kullaniciAdi

这是我的linq to sql查询：

var AdimCalismalari =
    from Adm in db.Adimlars.AsEnumerable()
     join Yzl in db.Yazilimcilars on Adm.refYazilimci_id equals Yzl.yazilimci_id
     join Drm in db.Durumlars on Adm.refDurum_id equals Drm.durum_id
     join AdmC in db.AdimCalismalaris on Adm.adim_id equals AdmC.refAdim_id
     where
         Adm.eklenmeTarihi.Value >= DateTime.Parse(dexIlkTarih.Text) &&
         Adm.eklenmeTarihi.Value <= DateTime.Parse(dexSonTarih.Text)
         && (AdmC.refDurum_id == 2 || AdmC.refDurum_id == 5)
     group Adm by new { yazilimci = Yzl.kullaniciAdi, AdimSayi = Adm.adim_id }
         into AdimToplam
         select new
                    {
                        yazilimci = AdimToplam.Key.yazilimci,
                        AdimSayi = AdimToplam.Key.AdimSayi
                    };

我的linq查询返回null结果但是我的sql查询返回3行。你对我的问题有任何想法吗？

KR，

Çağın

Answer 1

我看到一个潜在的问题：
当dexIlkTarih.Text为2011-03-22时，dexSonTarih.Text为2011-03-29，Adm.eklenmeTarihi.Value为2011-03-29 01:00，即它与您的上限具有相同的日期但也有一段时间，它不会被退回，因为：

2011-03-29 = 2011-03-29 00:00＆lt; 2011-03-29 01:00

这是您的SQL和LINQ查询之间的明确区别。

Answer 2

傻傻的，

我从Adimlars删除.AsEnumerable（）并解决了。谢谢你的建议。

KR，

Çağın

Linq到Sql的问题

2 个答案: