Question

我想使用LINQ将数据放入类中。

班级人员

public class Person
{
    public int Id {get; set;}
    public string Name { get; set; }
    public List<string> Surname { get; set; }
}

我想添加2个人，然后找到身份1的人，然后编辑姓名。你知道怎么做吗？

 public List<Person> persons { get; set; }
 public void example()
 {
 persons = new List<Person>();
 }

类似的东西？

new List<Person>{
                    Id = 1,
                    Name = "sadsad",
                    Surname = new string Suname {Surname="Examle"}

                };


                persons = (from a in Person
                                     where a.Id = 1
                                   select a).FirstOrDefault<Ankieta>();

                string s = persons.Name; // Update?

Answer 1

增加2人

List<Person> persons = new List<Person>{
        new Person(){
        Id = 1,
        Name = "sadsad",
        Surname = new List<string>(){"Examle"}
        },

        new Person(){
        Id = 2,
        Name = "fbs",
        Surname = new List<string>(){"ggg"}
        }};

// adding another person
persons.Add(new Person() { Id = 3, Name = "cc", Surname = new List<string>() { "ggg" } });

找到ID为1的人，然后使用ForEach

编辑姓名

persons.ForEach(p => p.Name = (p.Id == 1) ? "NewName" : p.Name);

Answer 2

首先，我将姓氏键入string：

public class Person
{
    public int Id {get; set;}
    public string Name { get; set; }
    public string Surname { get; set; }
}

然后：

persons.Add(new Person(){ Id = 1, Name = "Name", Surname = "Surname" });
//...
var result = (from a in persons where a.Id == 1 select a).FirstOrDefault();

属性使用类linq

2 个答案: