public async Task <IActionResult> Edit(Radar newValues)
        {
            //get session id (we will use it when updating data and handling errors)
            sessionID_s = HttpContext.Session.GetString("Session");
            sessionID   = Guid.Parse(sessionID_s);
            Data d = new Data();

            Program.data.TryGetValue(sessionID, out d);
            d.Radar = newValues;
            try
            {
                await _session.EditRadar(newValues.ID, newValues.name, newValues.system, newValues.configuration);
            }
            catch (Exception e)
            {
                // log exception here
                d.message = e.Message.ToString() + " Error";
                await _session.Rollback();
            }
            finally
            {
                _session.CloseTransaction();
            }
            d.edited = true;
            return(RedirectToAction("BeforeEdit", "Radar"));
        }