Question

这是我的LINQ（EF）：

var ls = from ps in ctx.Package_Services
     where 
        (ps.Package.Policy.Name != "Short-Term Career Policy"
            && ps.Package.Name != "Early Talent Package")
        &&
        (ps.Package.Policy.Name != "Assignment Policy"
            && ps.Package.Name != "Efficient Package")
     select new
     {
         Service = ps.Service,
         PackageService = ps
     };

这是它生成的相关SQL：

WHERE (N'Early Talent Package' <> [Extent2].[Name]) 
AND (N'Efficient Package' <> [Extent2].[Name]) 
AND (N'Short-Term Career Policy' <> [Extent3].[Name]) 
AND (N'Assignment Policy' <> [Extent4].[Name])

我想说的是，“我不想要组合X，我也不想要组合Y;但是，我确实想要”早期人才套餐“，它们与”短期“无关职业政策。“而且，当他们不依赖于”分配政策“时，我也想要”高效套餐“。

如何将其转换为LINQ？

Answer 1

它可能会消除它们，因为它不需要它们。

你实际上是在说“不是这个”和“不是这个”和“不是这个”和“不是这个”。< / p>

现在，如果中间有“OR”，则必须将它们考虑在内：

(ps.Package.Policy.Name != "Short-Term Career Policy"
    && ps.Package.Name != "Early Talent Package")
||
(ps.Package.Policy.Name != "Assignment Policy"
    && ps.Package.Name != "Efficient Package")

Answer 2

根据你所说的你想要实现的目标：

我不想要组合X和我也不想要组合Y; 但是，我确实希望“早期人才套餐”与他们没有关系 “短期职业政策。”并且，我也想要“高效套餐” 它们与“作业政策”无关。

我认为你的布尔逻辑一般都是有缺陷的。

当短期职业政策与短期职业政策无关时，您需要早期人才待遇：

((ps.Package.Policy.Name == "Early Talent Package") 
 && (ps.Package.Policy.Name != "Short-Term Career Policy"))

OR（||）

如果不依据分配政策，您需要高效套餐：

((ps.Package.Name == "Efficient Package") 
 && (ps.Package.Policy.Name != "Assignment Policy"))

所有在一起：

((ps.Package.Policy.Name == "Early Talent Package") 
    && (ps.Package.Policy.Name != "Short-Term Career Policy"))
||
((ps.Package.Name == "Efficient Package") 
    && (ps.Package.Policy.Name != "Assignment Policy"))

Answer 3

这对我有用。

var ls = from ps in ctx.Package_Services
         where 
            !(
                (ps.Package.Policy.Name == "Short-Term Career Policy"
                    && ps.Package.Name == "Early Talent Package")
                ||
                (ps.Package.Policy.Name == "Assignment Policy"
                    && ps.Package.Name == "Efficient Package")
            )
         select new
         {
             Service = ps.Service,
             PackageService = ps
         };

它生成的SQL就像这样：

SELECT 
1 AS [C1], 
[Extent4].[Id] AS [Id], 
[Extent4].[Name] AS [Name], 
[Filter1].[Id1] AS [Id1], 
[Filter1].[PackageId] AS [PackageId], 
[Filter1].[ServiceId] AS [ServiceId], 
[Filter1].[SectionId] AS [SectionId], 
[Filter1].[Mandatory] AS [Mandatory]
FROM   (SELECT [Extent1].[Id] AS [Id1], [Extent1].[PackageId] AS [PackageId], [Extent1].[ServiceId] AS [ServiceId], [Extent1].[SectionId] AS [SectionId], [Extent1].[Mandatory] AS [Mandatory]
    FROM   [dbo].[Package_Services] AS [Extent1]
    INNER JOIN [dbo].[Packages] AS [Extent2] ON [Extent1].[PackageId] = [Extent2].[Id]
    INNER JOIN [dbo].[Policy] AS [Extent3] ON [Extent2].[PolicyId] = [Extent3].[Id]
    WHERE ( NOT (((N'Short-Term Career Policy' = [Extent3].[Name]) AND (N'Early Talent Package' = [Extent2].[Name])) OR ((N'Assignment Policy' = [Extent3].[Name]) AND (N'Efficient Package' = [Extent2].[Name])))) AND (N'Exception Policy' <> [Extent3].[Name]) ) AS [Filter1]
INNER JOIN [dbo].[Services] AS [Extent4] ON [Filter1].[ServiceId] = [Extent4].[Id]
WHERE N'Transportation' = [Extent4].[Name]

LINQ不读括号

3 个答案: