Get the value from Model into List object-CodePudding

I have a student class with the following attributes and values. I am storing the first record of a student in a class into student object variable and how could I get the value of the first student in to List

    List<Student> studentList = new List<Student>() { 
            new Student() { StudentID = 1, StudentName = "John"} ,
            new Student() { StudentID = 2, StudentName = "Moin"} ,
            new Student() { StudentID = 3, StudentName = "Bill"} ,
            new Student() { StudentID = 4, StudentName = "Ram"} ,
            new Student() { StudentID = 5, StudentName = "Ron"} 
        };

Student student = new Student();

 foreach (var students in class.students)
   {
       
       student = students
       break
        
   }

List<Student> firstStudent = new List<Student>();

How can I get the value of student from the class into firstStudent

CodePudding user response：

Using list, you can get first object with .FirstOrDefault

E.g.,

studentList.FirstOrDefault()

If you're using LINQ, you can get this with conditions, like filtering IDs with a Lambda expression; e.g.,

studentList.FirstOrDefault(e => e.StudentID == <value>) //replace <value> with appropriate value.

Your code will be like this:

    List<Student> studentList = new List<Student>() { 
            new Student() { StudentID = 1, StudentName = "John"} ,
            new Student() { StudentID = 2, StudentName = "Moin"} ,
            new Student() { StudentID = 3, StudentName = "Bill"} ,
            new Student() { StudentID = 4, StudentName = "Ram"} ,
            new Student() { StudentID = 5, StudentName = "Ron"} 
        };

 Student student = new Student();

 foreach (var students in class.students)
   {
       
       student = students
       break
        
   }

List<Student> firstStudent = studentList.FirstOrDefault();

CodePudding user response：

maybe something like this. use linq take to just get the first one from the list

here is the fiddle https://dotnetfiddle.net/7eU8eZ

List<Student> studentList = new List<Student>() { 
            new Student() { StudentID = 1, StudentName = "John"} ,
            new Student() { StudentID = 2, StudentName = "Moin"} ,
            new Student() { StudentID = 3, StudentName = "Bill"} ,
            new Student() { StudentID = 4, StudentName = "Ram"} ,
            new Student() { StudentID = 5, StudentName = "Ron"} 
        };
        
        Class myClass = new Class(){
            ClassId = 1,
            Students = studentList
        };
        
        List<Student> firstStudent = 
        myClass.Students.OrderBy(x => x.StudentID).Take(1).ToList();
    };

CodePudding user response：

you can use index with list, it will create a list with one student

List<Student> firstStudent = new List<Student> { studentList[0] };

if you want just a first student

Student firstStudent = studentList[0] ;