public JsonResult GetUpazilaByDistrictId(int?districtId)
        {
            if (districtId == null)
            {
                return(null);
            }

            var upazilas = _upazilaManager.GetUpazilasById((int)districtId);

            return(Json(upazilas, JsonRequestBehavior.AllowGet));
        }
        public JsonResult GetUpazilaByDistrictId(int?districtId)
        {
            try
            {
                if (districtId == null)
                {
                    return(null);
                }

                var upazilas = _upazilaManager.GetUpazilasById((int)districtId);
                return(Json(upazilas, JsonRequestBehavior.AllowGet));
            }
            catch (Exception ex)
            {
                ExceptionMessage(ex);
                return(null);
            }
        }