Traduire SQL non 'dans' dans LINQ aux entités utilisant Entity Framework 4

Question

Comment traduire SQL avec des mots clés 'in' en LINQ en entités utilisant Entity Framework 4? Tous les champs se terminant par 'ID' sont de type entier.

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')) 

) 

Answer 1

Essayez quelque chose comme ceci:

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()))