Question

基本上我有一个带有子类的类（或嵌套类，无论它叫什么，都属于内部类）

我不知道为什么我无法访问（或者我猜列表中不包含嵌套类）嵌套类。

public static List<Tag> Tags = new List<Tag>();  

 //cureently selected tag,also random percentage related data
    public class Tag
    {
        public string name = null;
        public int dupe = 0;

        public int Tagindex = 0; 
        public int URLindex = 0;

        public class Type
        {
            public bool isArtist = false;
            public bool isGroup = false;
            public bool isTag = false;
            public bool isURL = false;
        }

        public class Score
        {

           //  0~10, sort them out!
            public bool isRated = false; //make true if user modifies score
            public int Story = 0;
            public int Reality = 0;
            public int Drawing = 0;
            public int memetic = 0;
            public string msg = null;

        }

dataGridView1.Rows.Add(gVar.Tags[i].Tagindex,gVar.Tags[i].name/*valid*/, gVar.Tags[i].Type.isArtist/*invalid*/);

//also invalid
Tag t1 = new Tag();
t1.Type.isArtist = true;
gVar.Tags.Add(t1);

Answer 1

嵌套类只是该类的声明，就像未嵌套该类一样。您必须实例化该类型的对象才能访问其属性之一。例如：

public class Tag
{
    public string name = null;
    public int dupe = 0;

    public int Tagindex = 0; 
    public int URLindex = 0;
    public Score Score { get; } = new Score() // declare a property of the nested type, and instantiate an object

    public class Type
    {
        public bool isArtist = false;
        public bool isGroup = false;
        public bool isTag = false;
        public bool isURL = false;
    }

    public class Score
    {

       //  0~10, sort them out!
        public bool isRated = false; //make true if user modifies score
        public int Story = 0;
        public int Reality = 0;
        public int Drawing = 0;
        public int memetic = 0;
        public string msg = null;

    }

以及用法：

Tag t1 = new Tag();
t1.Score.Story = 3;

顺便说一句，不建议使用公共字段，而应使用属性（例如上面代码中的Score属性）。

嵌套类<列表>：如何访问列表中的嵌套类？

1 个答案: