public DtoActivite(Activite activite)
 {
     Id = activite.Id;
     Nom = activite.Nom;
     Prix = activite.Prix;
     Description = activite.Description;
     Adresse = activite.Adresse;
     HeureDuJour = activite.HeureDuJour;
 }
        public IHttpActionResult PostActivite(DtoCreateActivite dtoCreateActivite)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            Activite activite = new Activite();
            activite.Prix = dtoCreateActivite.Prix;
            activite.Nom = dtoCreateActivite.Nom;
            activite.Description = dtoCreateActivite.Description;
            activite.Adresse = dtoCreateActivite.Adresse;
            activite.HeureDuJour = dtoCreateActivite.HeureDuJour;

            Jour jour = db.Jours.Where(u => u.Id.Equals(dtoCreateActivite.JourId)).FirstOrDefault();

            activite.Jour = jour;

            db.Activites.Add(activite);
            db.SaveChanges();

            return CreatedAtRoute("DefaultApi", new { id = activite.Id }, new DtoActivite(activite));
        }