.NET Core 3 System.Text.Json 嵌套对象序列化

Question

刚玩新System.Text.Json使用 VS2019 Web 应用程序模板:

将天气预报类声明为:

using System;

namespace WebApplication4
{
    public class WeatherForecast
    {
        public DateTime Date { get; set; }
        public int TemperatureC { get; set; }
        public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
        public string Summary { get; set; }
    }
}

示例方法:

 [HttpGet("Test1")]
    public WeatherForecast Test1()
    {
        WeatherForecast forecast = new WeatherForecast();
        return forecast;
    }

这工作正常，返回:
{"date":"0001-01-01T00:00:00","temperatureC":0,"temperatureF":32,"summary":null}

但是这段代码:

 public class TestClass
    {
        public WeatherForecast Forecast;
    }

    [HttpGet("Test")]
    public TestClass Test()
    {
        WeatherForecast forecast = new WeatherForecast();
        TestClass test = new TestClass()
        {
            Forecast = forecast
        };
        return test;
    }

返回 emply json 对象:{}

如何序列化嵌套对象？

Answer 1

您需要使用的属性可能字段不会序列化。添加 get 和 set 以进行预测。

public class TestClass
{
    public WeatherForecast Forecast {get;set;}
}