使用LINQ .OrderByDescending无法正常工作

Question

I am trying to build a query where there is one student name then a nested collection of clubs he belongs to. I want to organize this collection with OrderByDescending. I am stuck with what to provide to the parenthesis.

public void GetStudentsClubNameRev()
        {
            try
            {
                using (SchoolContainer = new SchoolContainer())
                {

                    var query = from student in SchoolContainer.Students
                                select new
                                {
                                    StudentName = student.Name,
                                    ClubName = student.StudentClubMatches
                                        .Where(s =>s.StudentId == student.Id)
                                        .Select(c => c.Club.Name)
                                        .OrderByDescending(o => "Name")
                                };
                }
            }
            catch (Exception ex)
            {

            }
        }

In .OrderByDescending(o => "Name") I don't know what my predicate is. I want to say orderbydescending on the Name which is club name. But I get errors because I don't think I understand what it wants.

Answer 1

After you've selected "Club.Name", the current enumerable is just a string. You just want a pass-through selector:

.Select(c => c.Club.Name)
.OrderByDescending(name => name)

Answer 2

If you OrderByDescending before Select you could also do this:

var query = from student in SchoolContainer.Students
    select new
    {
        StudentName = student.Name,
        ClubName = student.StudentClubMatches
            .Where(s =>s.StudentId == student.Id)
            .OrderByDescending(c => c.Club.Name)
            .Select(c => c.Club.Name)
    };

Cheers

Answer 3

To sort by a property you should use the following:
Code:

.OrderByDescending(o => o.Name)