按 STRING 参数对 C# 对象列表进行排序

Question

我有一个类对象列表ListUser。我需要能够传入一个字符串值，并使用文本表达式按该列按升序或降序排列。我所看到的所有使用 Lambda 表达式的东西都将对象属性作为强类型值，如何通过添加“名字降序”作为参数来实现这一点？

代码如下

namespace SortLists
{

  class ListUser
  {
    public int id { get; set; }
    public string firstname { get; set; }
    public string lastname { get; set; }
    public string company { get; set; }
    public string phonenumber { get; set; }
  }

  class Program
  {
     static void Main(string[] args)
     {
        var user1 = new ListUser() { id = 1, firstname = "James", lastname = "Smith", company = "Code Logic", phonenumber = "01235 566 456" };
        var user2 = new ListUser() { id = 1, firstname = "Chris", lastname = "Andrews", company = "Adobe", phonenumber = "01235 566 456" };
        var user3 = new ListUser() { id = 1, firstname = "Paul", lastname = "Jones", company = "Microsoft", phonenumber = "01235 566 456" };
        var user4 = new ListUser() { id = 1, firstname = "Peter", lastname = "Williams", company = "Apple", phonenumber = "01235 566 456" };

        List<ListUser> users = new List<ListUser>()
        {
            user1, user2, user3, user4
        };
    }
  }

Answer 1

添加对 nuget 包的引用：
https ://www.nuget.org/packages/System.Linq.Dynamic/

1. 添加using System.Linq.Dynamic;在顶部。
2. 使用var usersSorted = users.AsQueryable().OrderBy("firstname ASC").ToList();