JSON.NET的JsonConvert我在做什么错 [英] What am I doing wrong with JSON.NET's JsonConvert

问题描述

json字符串

{
  "success": true,
  "challenge_ts": "2016-11-03T17:30:00Z",
  "hostname": "mydomain.com"
}

班

internal class reCaptchaResponse
{
    internal bool success { get; set; }
    internal DateTime challenge_ts { get; set; }  // timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)
    internal string hostname { get; set; }        // the hostname of the site where the reCAPTCHA was solved
    internal string[] error_codes { get; set; }   // optional
}

尝试序列化

reCaptchaResponse responseObject = Newtonsoft.Json.JsonConvert.DeserializeObject<reCaptchaResponse>(jsonResult);

尝试失败，就像...

attempt fails like...

Newtonsoft.Json.JsonConvert.SerializeObject(responseObject)返回 {}

推荐答案

默认情况下，Json.Net仅序列化/反序列化 public 文件和属性，但是您也可以在不更改访问修饰符的情况下进行操作从内部到公开.

Json.Net, by default, only serializes/deserialzes public fileds and properties, but you can also do it without changing access modifiers from internal to public.

只需使用JsonProperty属性

internal class reCaptchaResponse
{
    [JsonProperty]
    internal bool success { get; set; }
    [JsonProperty]
    internal DateTime challenge_ts { get; set; }  // timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)
    [JsonProperty]
    internal string hostname { get; set; }        // the hostname of the site where the reCAPTCHA was solved
    [JsonProperty]
    internal string[] error_codes { get; set; }   // optional
}

(无需修改原始类)，甚至可以使用 ContractResolver 选择要在序列化过程中使用的属性/字段

(Without modifing the original class) You can even use ContractResolver to select which properties/fields should be used in serialization process

编辑

尽管这个答案已经被接受，但是我想发布一个代码，其中原始程序集不能被修改.

Although this answer has already been accepted, I want to post a code where the original assembly can not be modified.

var settings = new JsonSerializerSettings() { 
                   ContractResolver = new AllPropertiesContractResolver() 
               };
reCaptchaResponse responseObject = 
                JsonConvert.DeserializeObject<reCaptchaResponse>(jsonResult ,settings);

---

public class AllPropertiesContractResolver : DefaultContractResolver
{
    protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
    {
        var props = type.GetProperties(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance)
                    .Select(x => new Newtonsoft.Json.Serialization.JsonProperty()
                    {
                        PropertyName = x.Name,
                        PropertyType = x.PropertyType,
                        Readable = true,
                        ValueProvider = new AllPropertiesValueProvider(x),
                        Writable = true
                    })
                    .ToList();

        return props;
    }
}

public class AllPropertiesValueProvider : Newtonsoft.Json.Serialization.IValueProvider
{
    PropertyInfo _propertyInfo;

    public AllPropertiesValueProvider(PropertyInfo p)
    {
        _propertyInfo = p;
    }

    public object GetValue(object target)
    {
        return _propertyInfo.GetValue(target);  //Serialization
    }

    public void SetValue(object target, object value)
    {
        _propertyInfo.SetValue(target, value, null); //Deserialization
    }
}

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