C#写Json文件报错

Question

我想将数据从 Object 写入 Json 文件。

我类的人

public class Person
{
    private string firstName;
    private string lastName;
    private int height;
    private double weight;

    public Person() { }
    public Person(string firstName, string lastName, int height, double weight)
    {
        this.firstName = firstName;
        this.lastName = lastName;
        this.height = height;
        this.weight = weight;
    }
}

我的程序类

class Program
{
    static void Main(string[] args)
    {
        // serialize JSON to a string and then write string to a file
        Person ps1 = new Person("Tay", "Son", 180, 99.99);
        string json = JsonConvert.SerializeObject(ps1,Formatting.Indented);
        File.WriteAllText(@"c:\person.json", json);
        Console.WriteLine("Done");
        Console.ReadLine();
    }
}

person.json 只显示:“{}”

请帮我解决这个错误。

Answer 1

将您的代码更改为:

public string firstName;
public string lastName;
public int height;
public double weight;

私有(private)字段未序列化。