[英]Translate SQL 'not in' into LINQ to Entities using Entity Framework 4
如何使用Entity Framework 4将带有“ in in”关键字的SQL转换为LINQ to Entities? 所有以“ ID”结尾的字段均为整数类型。
SELECT *
FROM IRSampleCompletionGoal as goal_tbl
where
(Cast(goal_tbl.[TermID] as nvarchar) +' '+Cast(goal_tbl.[UserID] as nvarchar)+' '+Cast(goal_tbl.[CourseID] as nvarchar)+' '+cast(goal_tbl.[StudentID] as nvarchar)+' '+cast(goal_tbl.[ObjectiveID] as nvarchar))
NOT IN
(
select (Cast([TermID] as nvarchar) +' '+Cast([UserID] as nvarchar)+' '+Cast([CourseID] as nvarchar)+' '+cast([StudentID] as nvarchar)+' '+cast([ObjectiveID] as nvarchar))
from IRSampleCompletionCurrentStatistics
where ((ArtifactID is not null) OR (NoArtifactChecked='True' ))
)
尝试这样的事情:
goal_tbl.Where(x => !IRSampleCompletionCurrentStatistics.Where(i => i.ArtifactID != null || i.NoArtifactChecked == true).Any(i => (i.TermID.ToString() + " " + i.UserID.ToString() + i.StudentID.ToString() + " " + i.ObjectiveID.ToString()) == (x.TermID.ToString()+ " " + x.UserID.ToString() + " " + x.CourseID.ToString() + " " + x.StudentID.ToString() + x.ObjectiveID.ToString()))
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