C# 使用实体框架4将SQL“not in”转换为LINQ to实体

如何使用Entity Framework 4将带有“not in”关键字的SQL转换为LINQ to实体？ 以“ID”结尾的所有字段都是整数类型

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' ))

  )

---

试着这样做：

 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()))

---

创建一个数组，而不是thisArray.ContainssomevalueOr！此数组。包含C的meValue。非常感谢所有响应者！Bruniasty，您能用VB.NET语法编写相同的lambda查询吗？如何将此查询的结果分配给变量？像这样：Dim myvariable作为IEnumerableof IRSampleCompletionGoal='your query'？我尝试了Dim测试作为IEnumerableof IRSampleCompletionGoal=goal\u tbl.Where！IRSampleCompletionCurrentStatistics.Wherei=>i.ArtifactID！=null | | i.NoArtifactChecked==true.Anyi=>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，我在i.ArtifactID处得到了预期的标识符错误！=null，指向“！=”符号。尝试替换“！=“IsNot Nothing”上的null“Isnothing”，请不要忘记在lambda表达式的开头添加“x=>”。如果可能，请有人将原始查询翻译为查询表达式语法，而不是基于方法的语法（对于VB）？非常感谢。