OrderBy在Lambda表达式中降序？

Question

我知道在正常的Linq语法中,orderby xxx descending很容易,但是我如何在Lambda表达式中做到这一点？

Answer 1

正如布兰农说,这是OrderByDescending和ThenByDescending:

var query = from person in people
            orderby person.Name descending, person.Age descending
            select person.Name;

相当于:

var query = people.OrderByDescending(person => person.Name)
                  .ThenByDescending(person => person.Age)
                  .Select(person => person.Name);

Answer 2

用System.Linq.Enumerable.OrderByDescending()吗？

例如:

var items = someEnumerable.OrderByDescending();

Answer 3

试试这个:

List<int> list = new List<int>();
list.Add(1);
list.Add(5);
list.Add(4);
list.Add(3);
list.Add(2);

foreach (var item in list.OrderByDescending(x => x))
{
    Console.WriteLine(item);                
}

Answer 4

试试另一种方式:

var qry = Employees
          .OrderByDescending (s => s.EmpFName)
          .ThenBy (s => s.Address)
          .Select (s => s.EmpCode);

Queryable.ThenBy