在Json.Net全球注册自定义JsonConverter [英] Registering a custom JsonConverter globally in Json.Net

问题描述

使用 Json.Net 的，我有我的目标，需要采取特殊照顾，以序列化的属性/反序列化他们。制作 JsonConverter 的后裔，我设法成功地做到这一点。这是这样做的常见方式：

Using Json.Net, I have properties in my objects which need special care in order to serialize / deserialize them. Making a descendant of JsonConverter, I managed to accomplish this successfully. This is the common way of doing this:

public class SomeConverter : JsonConverter
{
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        ...
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        ...
    }

    public override bool CanConvert(Type objectType)
    {
        ...
    }
}

class SomeClass
{
    [JsonProperty, JsonConverter(typeof(SomeConverter))]
    public SomeType SomeProperty;
}

//Later on, in code somewhere
SomeClass SomeObject = new SomeClass();
string json = JsonConvert.SerializeObject(SomeObject, new SomeConverter());

我这个code问题是，我需要介绍一下我的自定义转换器在每一个序列化/反序列化。在我的项目有很多情况下，我不能这样做。举例来说，我使用的利用Json.Net，以及他们将工作在我的 SomeClass的实例等外部项目。但因为我不想或无法使他们的code修改，我也没办法介绍我的转换器。

My problem with this code is that I need to introduce my custom converter in every serialization / deserialization. In my project there are many cases that I cannot do that. For instance, I'm using other external projects which make use of Json.Net as well and they will be working on my SomeClass instances. But since I don't want to or can't make change in their code, I have no way to introduce my converter.

有什么办法，我可以使用一些静态会员注册我的转换器，也许，在Json.Net所以无论身在何处序列化/反序列化的情况，我的转换器总是present？

Is there any way I can register my converter, using some static member perhaps, in Json.Net so no matter where serialization / deserialization happens, my converter is always present?

推荐答案

是的，这是可能使用Json.Net 5.0.5或更高版本。见<一href=\"http://james.newtonking.com/json/help/?topic=html/P_Newtonsoft_Json_JsonConvert_DefaultSettings.htm\"><$c$c>JsonConvert.DefaultSettings.

Yes, this is possible using Json.Net 5.0.5 or later. See JsonConvert.DefaultSettings.

JsonConvert.DefaultSettings = () => new JsonSerializerSettings
{
    Converters = new List<JsonConverter> { new SomeConverter() }
};

// Later on...
string json = JsonConvert.SerializeObject(someObject);  // this will use SomeConverter

如果您正在使用Web API，你可以设置一个转换器全球这样，而不是：

If you're using Web API, you can set up a converter globally like this instead:

var config = GlobalConfiguration.Configuration;
var jsonSettings = config.Formatters.JsonFormatter.SerializerSettings;
jsonSettings.Converters.Add(new SomeConverter());

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