Json Properties Null - ASP.NET Core

Question

I have the following model

public class SocioEconomicStudy : BaseModel
{
    public string Folio { get; set; }

    public string Craft { get; set; }

    public string RequestType {get;set;}
}

And I send the following json

{
     "folio" : "folio",
     "craft" : "craft,
     "request_type": "request_type"
}

But when received the properties with underscore are null, I've tried camel case Pascal case, but only with the lowercase + underscores is that the properties without underscore work.

Controller method:

[HttpPost]
public void Post([FromBody] SocioEconomicStudy study)
{
    var cancellationToken = new CancellationToken();
    _logger.LogInformation((study != null).ToString());
    _context.SocioEconomicStudyRepository.AddAsync(study, cancellationToken);
}

So only the properties without underscore are persisted, any ideas on how to solve this?

What json serializer do you use?

Ruben Vardanyan
– Ruben Vardanyan

2017-05-03 10:03:16 +00:00
Commented May 3, 2017 at 10:03 — Ruben Vardanyan
– Ruben Vardanyan, Commented May 3, 2017 at 10:03
@RubenVardanyan I'm using the default serializer,

J. Pichardo
– J. Pichardo

2017-05-03 14:16:27 +00:00
Commented May 3, 2017 at 14:16 — J. Pichardo
– J. Pichardo, Commented May 3, 2017 at 14:16
See the answer below

Ruben Vardanyan
– Ruben Vardanyan

2017-05-03 17:46:52 +00:00
Commented May 3, 2017 at 17:46 — Ruben Vardanyan
– Ruben Vardanyan, Commented May 3, 2017 at 17:46

Ruben Vardanyan · Accepted Answer · 2017-05-03 17:46:01Z

2

For the properties which not follow the naming rules you can add JsonProperty attribute, in your case your model should look like this

public class SocioEconomicStudy : BaseModel
{
    public string Folio { get; set; }

    public string Craft { get; set; }

    [JsonProperty("request_type")]
    public string RequestType { get; set; }
}

answered May 3, 2017 at 17:46

Ruben Vardanyan

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2 Comments

J. Pichardo Over a year ago

Thanks, but if my model changes, or I need more models, I will also need to annotate every property with more than one word.

Ruben Vardanyan Over a year ago

Yes you need to annotate every property or change the frontend part to send property named camel case

J. Pichardo · Accepted Answer · 2017-05-03 18:23:40Z

0

Adding the following to Startup.cs solved my problem

services.AddMvc()
        .AddJsonOptions(options =>
         {
             options.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver();
         });

Now it accepts camelCase keys

answered May 3, 2017 at 18:23

J. Pichardo

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