按STRING参数对C#对象的列表进行排序 [英] Sort List of C# object by STRING parameter

问题描述

我有一个ListUser类对象的列表.我需要能够使用文本表达式传递String值并按该列的升序或降序排序.我所看到的使用Lambda表达式的所有内容，都具有object属性作为强类型值，如何通过添加"first降序"作为参数来实现此目的?

I have a list of ListUser class objects. I need to be able to pass in a String value and order by that column in ascending or descending order using text expression. Everything I have seen that uses Lambda expressions, has the object property as a strongly typed value, How can I achieve this by adding in "firstname descending" as a parameter ?

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
        };
    }
  }

推荐答案

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

Add reference to nuget package:
https://www.nuget.org/packages/System.Linq.Dynamic/

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

1. Add using System.Linq.Dynamic; at the top.
2. Use var usersSorted = users.AsQueryable().OrderBy("firstname ASC").ToList();

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