public HttpResponseMessage Post([FromBody] preg_question data)
 {
     try
     {
         int user_id = Convert.ToInt32(((ClaimsIdentity)(User.Identity)).FindFirst("id").Value);
         if (!data.DeepEquals(new preg_question()))
         {
             if (data.custom_question_by_user_id != null)
             {
                 data.custom_question_by_user_id = user_id;
             }
             dao.InsertData(data);
             return(Request.CreateResponse(HttpStatusCode.Created, SysConst.DATA_INSERT_SUCCESS));
         }
         else
         {
             HttpError err = new HttpError(SysConst.DATA_NOT_EMPTY);
             return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, err));
         }
     }
     catch (Exception ex)
     {
         HttpError err = new HttpError(ex.Message);
         return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, err));
     }
 }