C#检查一个列表是否是另一个列表的一部分 [英] C# Check if a List is a part of another List

问题描述

我有两个列表，如下所示

I have two lists as follows

 var query1 = from enrollments in db.Enrollments
             where enrollments.studentID == studentID && enrollments.result >= 50 && enrollments.enrolled == false
             select enrollments.subjectID;
 var query2 = from prerequisites in db.Prerequisites
              where prerequisites.subjectID == subjectID
              select prerequisites.prerequisiteID;

现在，我要确保query2中的所有数字都存在于query1中.换句话说，我要确保query2是query1的一部分

Now I want to make sure that all the numbers in query2 exist in query1. In other words, I want to ensure that query2 is a part of query1

有什么想法吗?

PS

-您可以确定subjectID和prerequisiteID是同一件事

-You can be sure that subjectID and prerequisiteID are the same thing

-我可以将query1和query2转换为类似query.ToList()

-I can convert query1 and query2 to lists like that query.ToList()

推荐答案

bool results =  query2.All(i=>query1.Contains(i));

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