JSON.Net的反序列化返回"null" [英] Deserialization of JSON.Net returns 'null'

问题描述

我正在使用JSON.Net反序列化JSON字符串. JSON字符串是

I am using JSON.Net to Deserialize a JSON string. The JSON string is

string testJson = @"{
                    ""Fruits"": {
                        ""Apple"": {
                            ""color"": ""red"",
                            ""size"": ""round""                               
                        },
                        ""Orange"": {
                            ""Properties"": {
                                ""color"": ""red"",
                                ""size"": ""round"" 
                            }
                        }
                    }
                }";

我的代码是

public class Fruits
{
    public Apple apple { get; set; }
    public Orange orange { get; set; }
}

public class Apple
{
    public string color { get; set; }
    public string size { get; set; }            
}

public class Orange
{
    public Properties properties { get; set; }
}

public class Properties
{
    public string color { get; set; }
    public string size { get; set; }   
}   

我正在尝试使用以下代码对此进行反序列化

I am trying to Deserialize this with the following code

Fruits result = JsonConvert.DeserializeObject<Fruits>(testJson);

我的结果中存在一个问题，即苹果和橙色的水果具有null而不是他们的属性，颜色，大小.

I have a problem in my result that Fruits with Apple and Orange has null instead of their Properties , color , size.

推荐答案

假设您无法更改json，则需要创建一个具有Fruits属性的新FruitsWrapper类

Assuming you can't change the json, you need to create a new FruitsWrapper class that has a Fruits property

public class FruitsWrapper
{
    public Fruits Fruits { get; set; }
}

并将json反序列化为FruitsWrapper的实例而不是Fruits

and deserialize the json into an instance of FruitsWrapper instead of Fruits

FruitsWrapper result = JsonConvert.DeserializeObject<FruitsWrapper>(testJson);

正在运行的演示: https://dotnetfiddle.net/nQitSD

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