[英]Transform SQL Query to LINQ
I would like if someone helps me to convert this SQL Query to LINQ syntax. 我希望有人帮助我将此SQL查询转换为LINQ语法。
SELECT i.Id, i.Condomino as Condomino, i.Interno as Interno,
p.NomePiano as NomePiano, s.Nome as NomeCondominio,
m.millesimi_fabbisogno_acs, m.millesimi_fabbisogno_riscaldamento
FROM Interni i
INNER JOIN Piani p ON i.IdPiano = p.Id
INNER JOIN Stabili s ON i.IdStabile = s.Id
LEFT JOIN MillesimiTabellaC m ON i.Id = m.idInterno
WHERE s.IdCondominio = {0}
I tried using something like this, but is not working.. 我尝试使用类似的方法,但无法正常工作。
return _Db.Interni.Include("Piani").Where(x => x.Piani.IdCondominio == iidcond).ToList();
I made it on-the-spot (so it's not tested), but perhaps it's enough to give you the idea. 我是当场制作的(因此未经测试),但是也许足以给您这个想法。 I'm also assuming that your DB model has foreign keys set up.
我还假设您的数据库模型已设置了外键。
var result = _db.Interni
.Where(i => i.Stabili.IdCondominio = [value])
.Select(i => new
{
i.Id,
Condomino = i.Condomino,
Interno = i.Interno,
NomePiano = i.Piani.NomePiano,
NomeCondominio = i.Stabili.Nome,
i.MillesimiTabellaC.millesimi_fabbisogno_acs,
i.MillesimiTabellaC.millesimi_fabbisogno_riscaldamento
})
.ToList();
update 更新
In case you don't have a foreign key between Interni
and MillesimiTabellaC
, try this: 如果您在
Interni
和MillesimiTabellaC
之间没有外键,请尝试以下操作:
var result = _db.Interni
.Include(i => i.Piani)
.Include(i => i.Stabili)
.Where(i => i.Stabili.IdCondominio = [value])
.Select(i => new
{
Interni = i,
MillesimiTabellaC = _db.MillesimiTabellaC.Where(m => i.Id = m.idInterno)
})
.Select(x => new
{
Id = x.Interni.Id,
Condomino = x.Interni.Condomino,
Interno = x.Interni.Interno,
NomePiano = x.Interni.Piani.NomePiano,
NomeCondominio = x.Interni.Stabili.Nome,
x.MillesimiTabellaC?.millesimi_fabbisogno_acs,
x.MillesimiTabellaC?.millesimi_fabbisogno_riscaldamento
})
.ToList();
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