c# - 通过 Lambda 表达式对 List<Object> 进行排序

Question

我有两种类型:

class Person 
{
  public string Name {get;set;}
  public string Car {get;set;}
}

和第二种:

class Employee
{
  public string Name {get;set;}
  public string Salary {get;set;}
}

属性的 名称 相同(在两种类型上)。
我还得到了列表:

List<Person> _ListPerson = new List<Person>
List<Employee> _ListEmployee = new List<Employee>();  

我在哪里添加了一些项目:

_ListPerson.Add( new Person { Name = "Jora" , Car = "BMW" };
_ListPerson.Add( new Person { Name = "Andrew" , Car = "Audi" };
_ListPerson.Add( new Person { Name = "Vasya" , Car = "Jiguli" };
_ListPerson.Add( new Person { Name = "Vasya" , Car = "Mercedes" };
_ListPerson.Add( new Person { Name = "Andy" , Car = "Renault" };  

_ListEmployee.Add(new Employee { Name = "Vasya", Salary = "1000$"};
_ListEmployee.Add(new Employee { Name = "Andy", Salary = "200$"};
_ListEmployee.Add(new Employee { Name = "Andrew", Salary = "5000$"};
_ListEmployee.Add(new Employee { Name = "Jora", Salary = "100$"};  

出于某种原因，我需要统一这些类型:

List<Object> People = New List<Object>();  
People.AddRange(_ListPerson);
People.AddRange(_ListEmployee);   

那么我如何通过 lambda 表达式对这些人进行排序？
目前我正在做这样的事情:

var _TEMP = _List.OfType<Person>().GroupBy(x => x.Name);....  //etc ,how i can use order by for these two types? Because oftype works only for one type.

Answer 1

最简单的方法是 Person和 Employee共享一些公共(public)基类或实现一个公共(public)接口(interface)。例如:

public interface IName
{
    string Name { get; }
}

class Person : IName
{
    public string Name { get; set; }
    public string Car { get; set; }
}

class Employee : IName
{
    public string Name { get; set;}
    public string Salary { get; set;}
}

然后不是创建 List<object>并使用 OfType ，您可以使用这种常见类型创建您的列表:

var people = new List<IName>();  
people.AddRange(_ListPerson);
people.AddRange(_ListEmployee);

和组:

var grouped = people.GroupBy(x => x.Name);

尽管您提到要排序，但实际上可以使用 OrderBy 来实现或 OrderByDescending :

var sorted = people.OrderBy(x => x.Name);