public ActionResult AssignDevice(int DevUsrKy, int DeviceKy)
        {
            int    UsrKy   = HTNSession.UsrKy;
            int    CKy     = HTNSession.CKy;
            string Env     = HTNSession.Environment;
            bool   process = false;

            process = ApiOpr.AssignDevice(UsrKy, CKy, Env, DevUsrKy, DeviceKy);
            return(Json(process, JsonRequestBehavior.AllowGet));
        }