public OperationResult <string> Suburb2Area([FromUri] string country, [FromUri] string city, [FromUri] string suburb)
        {
            var result = new OperationResult <string>(true);

            if (country.ToUpper().Equals("NZ") && city.ToUpper().Equals("AUCKLAND"))
            {
                //get surburb for auckland
                var suburbRec = Suburb.Find(suburb, city, country, _db);
                if (suburbRec != null)
                {
                    result.Data = suburbRec.Area;
                }
                else
                {
                    result.Succeeded = false;
                    result.Message   = "不能识别Suburb";
                }
            }
            else
            {
                result.Data = city;
            }


            return(result);
        }