Web API complex parameter properties are all null

Question

I have a Web API service call that updates a user\'s preferences. Unfortunately when I call this POST method from a jQuery ajax call, the request parameter object\'s proper

Answer 1

I have also facing this issue and after many hours from debbug and research can notice the issue was not caused by Content-Type or Type $Ajax attributes, the issue was caused by NULL values on my JSON object, is a very rude issue since the POST neither makes but once fix the NULL values the POST was fine and natively cast to my respuestaComparacion class here the code:

JSON

 respuestaComparacion: {
                            anioRegistro: NULL, --> cannot cast to BOOL
                            claveElector: NULL, --> cannot cast to BOOL
                            apellidoPaterno: true,
                            numeroEmisionCredencial: false,
                            nombre: true,
                            curp: NULL, --> cannot cast to BOOL
                            apellidoMaterno: true,
                            ocr: true
                        }

Controller

[Route("Similitud")]
[HttpPost]
[AllowAnonymous]

public IHttpActionResult SimilitudResult([FromBody] RespuestaComparacion req)
{
   var nombre = req.nombre;
}

Class

public class RespuestaComparacion
    {
        public bool anioRegistro { get; set; }
        public bool claveElector { get; set; }
        public bool apellidoPaterno { get; set; }
        public bool numeroEmisionCredencial { get; set; }
        public bool nombre { get; set; }
        public bool curp { get; set; }
        public bool apellidoMaterno { get; set; }
        public bool ocr { get; set; }
    }

Hope this help.