public HttpResponseMessage UpdateData(string id, [FromBody] preg_question dataUpdate)
        {
            try
            {
                int user_id = Convert.ToInt32(((ClaimsIdentity)(User.Identity)).FindFirst("id").Value);
                if (!dataUpdate.DeepEquals(new preg_question()))
                {
                    preg_question question = new preg_question();
                    question = dao.GetItemByID(Convert.ToInt32(id)).Where(c => c.custom_question_by_user_id == null || c.custom_question_by_user_id == user_id).FirstOrDefault();
                    if (question == null)
                    {
                        return(Request.CreateErrorResponse(HttpStatusCode.NotFound, SysConst.DATA_NOT_FOUND));
                    }
                    if (dataUpdate.question_type_id != null)
                    {
                        question.question_type_id = dataUpdate.question_type_id;
                    }
                    if (dataUpdate.content != null)
                    {
                        question.content = dataUpdate.content;
                    }
                    if (dataUpdate.custom_question_by_user_id != null)
                    {
                        question.custom_question_by_user_id = user_id;
                    }

                    dao.UpdateData(question);
                    return(Request.CreateResponse(HttpStatusCode.Accepted, SysConst.DATA_UPDATE_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));
            }
        }