JSon.Net how to have $type only for deserialization

Question

I used the $type properties in Json for the deserialization of inherited objects (to choose the correct object type in which to deserialize at runtime)

I do this using :

config.Formatters.JsonFormatter.SerializerSettings = new JsonSerializerSettings{ TypeNameHandling = TypeNameHandling.Objects}

this line is in the WebApiConfig file.

It works fine but I can't figure out how to restrict the $type only to the webservices who actually needs it (I only need it for one PUT and one POST). The $type is messing up the API results for the other webservices and I can't find some TypeNameHandling configuration nor some serialization option to avoid this. Does anyone knows how to do that? Cheers!

I need it for a nested object. at least for now ... I can still refactor and use it at the root. — Clément, Nov 13 '15 at 14:31

score 1 · Accepted Answer · answered Nov 13 '15 at 14:39

To enable type name handling on a nested object, you can attach [JsonProperty(ItemTypeNameHandling = TypeNameHandling.Objects)] to the containing property, like so:

public class RootObject
{
    [JsonProperty(ItemTypeNameHandling = TypeNameHandling.Objects)]
    public object Data { get; set; }
}

There's no builtin way to enable type name handling on a specific type, and so there's no builtin way to enable type name handling on the root object. Instead, you could use the EnableJsonTypeNameHandlingConverter from SignalR Typenamehandling if you need to do this.

score 0 · Answer 2 · edited May 23 '17 at 11:51

0

Thanks for the help dbc. I had other issues during deserialization (using a OData.Delta object and the solution you proposed didn't actually fit completely the need. I overcame the issue thanks to this post : Custom Json.NET serializer settings per type to have the $type customization only for a few webservices.

edited May 23 '17 at 11:51

Community

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answered Nov 24 '15 at 14:49

Clément

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JSon.Net how to have $type only for deserialization

2 Answers2