筛选和排序数组

Question

I am working on a .net web application for School Management System.

There are 2 DTO objects Subject and Student

Subject.cs

public class Subject
    {
        public string SubjectCode { get; set; }
        public string SubjectName { get; set; }
        public int StudentsEnrolled { get; set; }
        public IReadOnlyCollection<Student> Students { get; set; }
    }

Student.cs

public class Student
    {
        public string StudentId { get; set; }
        public string StudentName { get; set; }
        public int Marks { get; set; }
        public int Status { get; set; }
    }

There is an API method 'GetSubjectDetails' where we need to pass the subject name as argument. The output is a Subject object with Subject details and list of students enrolled for that subject.

Subject subject = GetSubjectDetails("Mathematics);

Now I have the Subject object with all the 50 students list in it. Now I need to filter the object with only 10 students who got the least marks in that subject.

How do I filter object. I can do it in either C#.net in server side or in the front end using typescript.

Answer 1

您可以在服务器端bcs上使用LINQ加载所有对象，而在ui端进行过滤没有任何意义，因此您可以执行以下操作

subject.Students=subject.Students.OrderBy(s=>s.Marks).Take(10).ToList().AsReadOnly();

Answer 2

尝试这个 ：

var students = subject.Students.OrderByDescending(x => x.Marks).Take(10).ToList();