更改对象列表中的一个元素属性值也会更改所有元素值

问题描述

这是我的班级，名称为"Objek".

this is my class named "Objek".

public class Objek
{
    public int id;
    public int tipe;
    public int bentuk;
    public List<int> x { get; set; }
    public List<int> y { get; set; }
    public int xC { get; set; }
    public int yC { get; set; }
    public Color Warna { get; set; }
    public Objek()
    {
        this.Warna = Color.Black;
        this.x = new List<int>();
        this.y = new List<int>();
    }
    public Objek(int tipe, int bentuk)
    {
        this.tipe = tipe;
        this.bentuk = bentuk;

        this.Warna = Color.Black;
        this.x = new List<int>();
        this.y = new List<int>();
    }
}

然后在form1.cs中，我在所有方法之外全局声明了这一点:

then in the form1.cs I declared this globally (outside any method):

Objek temp = new Objek();

输入"temp"的值后，将其存储到列表中:

after I input the value of the "temp", I stored it to a List:

List<Objek> Objek = new List<Objek>();与Objek.Add(temp);问题是，每当我存储了多个临时"对象后，只要更改元素的一个属性值(例如:Objek[0].Warna = Color.Red)，所有的Objek[0, 1, ..., n].Warna也会更改为红色.

List<Objek> Objek = new List<Objek>(); with Objek.Add(temp);the problem is whenever I changed one of the element's attribute value (ex: Objek[0].Warna = Color.Red) after stored more than 1 "temp" object, all Objek[0, 1, ..., n].Warna also changed to Red.

有人可以向我解释这些代码的错误之处在哪里吗?

Can someone explain me where is my fault in these code?

推荐答案

听起来像是将相同的对象引用添加到列表中.将Objek temp = new Objek();移到方法内部，以便每次创建一个新对象，否则，每次调用此方法时，它都会使用/添加同一对象.

Sounds like you are adding the same object reference to the List. Move Objek temp = new Objek(); inside the method so that you are creating a new object everytime, otherwise everytime you call this method it is using/adding the same object.

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