how to get newtonsoft to camelcase object properties

Question

I've got the following code which newtonsoft camelcases the top level of properties but not the properties passed in as Object.

public class Event
{
    public int Id { get; set; }
    public string Name { get; set; }
    public object Body { get; set; }
}

Here is my test:

public void Test()
{
    var json = @"
        {
            'Id': 2,
            'Name': 'Foo',
            'Body': {
                'ShipmentId':'6983136',
                'PickupDate':'2019-07-26T17:14:11Z',
                'OrderNumbers':['9638063']
            }
        }";

    var myEvent = JsonConvert.DeserializeObject<Event>(json);
    var camelSettings = new JsonSerializerSettings { ContractResolver = new CamelCasePropertyNamesContractResolver() };
    var endJson = JsonConvert.SerializeObject(myEvent, camelSettings);
    Console.WriteLine(endJson);
}

This outputs:

{"id":2,"name":"Foo","body":{"ShipmentId":"6983136","PickupDate":"2019-07-26T17:14:11Z","OrderNumbers":["9638063"]}}

How do I get it to camelcase the properties inside of body.

Answer 1

One solution would be to use ExpandoObject. For example,

var myEvent = JsonConvert.DeserializeObject<ExpandoObject>(json); // Deserialize as ExpandoObject
var camelSettings = new JsonSerializerSettings { ContractResolver = new CamelCasePropertyNamesContractResolver() };
var endJson = JsonConvert.SerializeObject(myEvent, camelSettings);

Please note that above code Deserialize the json as ExpandoObject instead of Event. This would produce as endJson as

{"id":2,"name":"Foo","body":{"shipmentId":"6983136","pickupDate":"2019-07-26T17:14:11Z","orderNumbers":["9638063"]}}

Answer 2

I have faced this issue before. It is because of type object.

You can get fix it by creating a class for body or follow this link https://andrewlock.net/serializing-a-pascalcase-newtonsoft-json-jobject-to-camelcase/#3-convert-a-pascalcase-jobject-to-camelcase

If you follow the link. You have to convert it first into JObject using below code

var myEvent = JObject.Parse(json);  
var endJson = JsonConvert.SerializeObject(myEvent.ToCamelCaseJToken(), camelSettings);