C#检查列表是否是另一个列表的一部分

发布时间：2020-12-15 19:46:31 所属栏目：百科来源：网络整理

导读：参见英文答案 Check whether an array is a subset of another????????????????????????????????????8个我有两个列表如下 var query1 = from enrollments in db.Enrollments where enrollments.studentID == studentID enrollments.result = 50 enrollments

参见英文答案 > Check whether an array is a subset of another????????????????????????????????????8个
我有两个列表如下

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;

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

有任何想法吗？

P.S

– 您可以确定subjectID和prerequisiteID是相同的

– 我可以将query1和query2转换为类似于query.ToList()的列表

解决方法

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