问题描述
我需要你的帮助,我是 ASPNET mvc 的新手,我对 LINQ 的理解有一个大问题:D 我需要做这个简单的查询:
Select * from Scarico
where Scarico.CaricoId in
(Select Id from Carico where Carico.MattonieraId = ID) <-- ID is
我尝试使用这种方法来检索 Scarichi 列表:
private List<Scarico> GetScarichiList(Guid id)
{
var listaCarichi = from Carico in _db.Carico
where Carico.MattonieraId.Equals(id)
select Carico.Id;
var ScarichiList = (from Scarico in _db.Scarico
where listaCarichi.Contains(Scarico.Id)
select Scarico).ToList();
return ScarichiList;
}
第二个变量“ScarichiList”不包含任何值,实际上它应该包含2个值... 我哪里错了?
提前致谢
编辑:
自动生成的 sql: 查询 1 (listaCarichi):
SELECT [Extent1].[Id] AS [Id] FROM [dbo].[Carico] AS [Extent1] WHERE [Extent1].[MattonieraId] = @p__linq__0}
查询 2(ScarichiList):
SELECT
[Extent1].[Id] AS [Id],[Extent1].[Stato] AS [Stato],[Extent1].[DataReg] AS [DataReg],[Extent1].[UltAgg] AS [UltAgg],...
FROM [dbo].[Scarico] AS [Extent1]
WHERE EXISTS (SELECT 1 AS [C1] FROM [dbo].[Carico] AS [Extent2] WHERE ([Extent2].[MattonieraId] = @p__linq__0)
AND ([Extent2].[Id] = [Extent1].[Id]) )
解决方法
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