Question

i’m trying to deserialize a json string into a new list on C# using json.net.

When i do a direct deserialization i get some attributes as null because i have different objects on my list.

So i want to create a “translator” for that task, building generic objects and setting the attributes of my objects.

this is my progress..

CitasProfesorWeb.JavaService.AgendaWSService service =
    new JavaService.AgendaWSService();
JsonTextReader reader;

private void cargaDatos()
{
    String lista = service.obtenerCitasNuevas(2);
    reader = new JsonTextReader(new StringReader(lista));

    while (reader.Read())
    {
        //here i want to read the attributes or objects
    }
}

i have tried using JsonConvert.PopulateObject(reader,cita) but i’m getting an error message saying that i have invalid parameters.

–Edit–

This is the string that i’m receiving :

[{"idCita":6,"fechaSolicitud":"2012/4/20","fechaCita":"2012/4/19","horario":{"idHorario":1,"fechaInicio":"2012/1/16","fechaHoy":1337281297199,"fechaFin":"2012/5/30","nombre":"Enero-Mayo 2012","profesor":{"idProfesor":2, "nombre":"Guillermo", "apellido":"Salazar", "nomUsuario":"g.salazar", "email":"[e-mail]", "ubicacion":"LV323", "descripcion":"Profesor Interino"}},"alumno":{"idAlumno":1, "nombre":"Jhonatan", "apellido":"Romero", "nomUsuario":" jromero", "email":"jhonatanromgggggh", "carrera":"LSIA" },"asunto":"asesorias","status":"0","horaCita":"10:0"}, {"idCita":7,"fechaSolicitud":"2012/4/20","fechaCita":"2012/4/27","horario":{"idHorario":1,"fechaInicio":"2012/1/16","fechaHoy":1337281297199,"fechaFin":"2012/5/30","nombre":"Enero-Mayo 2012","profesor":{"idProfesor":2, "nombre":"Guillermo", "apellido":"Salazar", "nomUsuario":"g.salazar", "email":"[e-mail]", "ubicacion":"LV323", "descripcion":"Profesor Interino"}},"alumno":{"idAlumno":1, "nombre":"Jhonatan", "apellido":"Romero", "nomUsuario":" jromero", "email":"jhonatanromgggggh", "carrera":"LSIA" },"asunto":"asesorias","status":"0","horaCita":"11:0"}, {"idCita":11,"fechaSolicitud":"2012/4/20","fechaCita":"2012/4/20","horario":{"idHorario":1,"fechaInicio":"2012/1/16","fechaHoy":1337281297199,"fechaFin":"2012/5/30","nombre":"Enero-Mayo 2012","profesor":{"idProfesor":2, "nombre":"Guillermo", "apellido":"Salazar", "nomUsuario":"g.salazar", "email":"[e-mail]", "ubicacion":"LV323", "descripcion":"Profesor Interino"}},"alumno":{"idAlumno":1, "nombre":"Jhonatan", "apellido":"Romero", "nomUsuario":" jromero", "email":"jhonatanromgggggh", "carrera":"LSIA" },"asunto":"asesorias","status":"0","horaCita":"17:0"}, {"idCita":12,"fechaSolicitud":"2012/4/27","fechaCita":"2012/5/3","horario":{"idHorario":1,"fechaInicio":"2012/1/16","fechaHoy":1337281297199,"fechaFin":"2012/5/30","nombre":"Enero-Mayo 2012","profesor":{"idProfesor":2, "nombre":"Guillermo", "apellido":"Salazar", "nomUsuario":"g.salazar", "email":"[e-mail]", "ubicacion":"LV323", "descripcion":"Profesor Interino"}},"alumno":{"idAlumno":1, "nombre":"Jhonatan", "apellido":"Romero", "nomUsuario":" jromero", "email":"jhonatanromgggggh", "carrera":"LSIA" },"asunto":"tesis","status":"0","horaCita":"12:0"}, {"idCita":15,"fechaSolicitud":"2012/5/11","fechaCita":"2012/4/20","horario":{"idHorario":1,"fechaInicio":"2012/1/16","fechaHoy":1337281297200,"fechaFin":"2012/5/30","nombre":"Enero-Mayo 2012","profesor":{"idProfesor":2, "nombre":"Guillermo", "apellido":"Salazar", "nomUsuario":"g.salazar", "email":"[e-mail]", "ubicacion":"LV323", "descripcion":"Profesor Interino"}},"alumno":{"idAlumno":1, "nombre":"Jhonatan", "apellido":"Romero", "nomUsuario":" jromero", "email":"jhonatanromgggggh", "carrera":"LSIA" },"asunto":"Tesis","status":"0","horaCita":"10:0"}]

This is my class:

public class Cita
    {
        Profesor profesor;

        public Profesor Profesor
        {
            get { return profesor; }
            set { profesor = value; }
        }

        Alumno alumno;

        public Alumno Alumno
        {
            get { return alumno; }
            set { alumno = value; }
        }

        DateTime inicioCita;

        public DateTime InicioCita
        {
            get { return inicioCita; }
            set { inicioCita = value; }
        }

        String asunto;

        public String Asunto
        {
            get { return asunto; }
            set { asunto = value; }
        }

        String lugar;

        public String Lugar
        {
            get { return lugar; }
            set { lugar = value; }
        }

        int status;

        public int Status
        {
            get { return status; }
            set { status = value; }
        }

        DateTime fechaSolicitud;

        public DateTime FechaSolicitud
        {
            get { return fechaSolicitud; }
            set { fechaSolicitud = value; }
        }


    }

Answer 1

I would use dynamic to parse your json string like below (without the need to declare cita,horario,profesor,alumno classes)

dynamic dynObj = JsonConvert.DeserializeObject(json);

foreach (var cita in dynObj)
{
    Console.WriteLine("{0} {1} {2}",
        cita.horario.profesor.apellido,
        cita.alumno.nombre,
        cita.fechaSolicitud
        );
}