从查询中排除列表项

Question

我有一个工作正常的方法。我试图添加一些修改查询，我无法通过。

public List<ProductDetails> getQuestionsNotRelatedWithProduct(int iProductID, int iSpaceID)
        {

          var   oQuest    = (from s in db.Questionaires
                              join t in db._Product_UserQuestionaires
                              on s.Questionaire_ID equals t.Questionaire_ID
                              where !(from n in db.Product_UserQuestionaires
                                      join u in db.Products
                                      on n.Product_ID equals u._Product_ID
                                              where (u.Space_Type_ID == iSpaceID && u.Product_ID == iProductID)
                                      select n.Questionaire_ID).Contains(s.Questionaire_ID)
                              select new ProductDetails
                              {
                                  Question = s.Questionaire.ToString(),
                                  QuestionID = s.Questionaire_ID,
                              }).Distinct();
  return oQuest.ToList();

      }

我想要像

一样

public List<ProductDetails> getQuestionsNotRelatedWithProduct(int iProductID, int iSpaceID, IList questid)
{

//here i want to filter out/exclude the "IList questid" items from the query result
not getting how to do.

}

任何人都可以帮助我

由于

Answer 1

只需将原始方法中的return语句修改为类似

return oQuest.Where(i => !questid.Contains(i.QuestionID)).ToList();