public string GetDataForSelectedModel()
        {
            string resultString = "";

            if (currentSelectedModel == RequestConsts.Get.Bus.className)
            {
                foreach (Bus bus in BusProxy.GetAll())
                {
                    resultString += bus.GetDescription();
                    resultString += Consts.lineBreaker;
                }
            }
            else if (currentSelectedModel == RequestConsts.Get.Person.className)
            {
                foreach (Person person in PersonInfoProxy.GetAll())
                {
                    resultString += person.GetDescription();
                    resultString += Consts.lineBreaker;
                }
            }
            else if (currentSelectedModel == RequestConsts.Get.Itinerary.className)
            {
                foreach (Itinerary itinerary in ItineraryProxy.GetAll())
                {
                    resultString += itinerary.GetDescription();
                    resultString += Consts.lineBreaker;
                }
            }
            else if (currentSelectedModel == RequestConsts.Get.CredentialsInfo.className)
            {
                foreach (CredentialsInfo credentialsInfo in CredentialsInfoProxy.GetAll())
                {
                    resultString += credentialsInfo.GetDescription();
                    resultString += Consts.lineBreaker;
                }
            }
            else if (currentSelectedModel == RequestConsts.Get.RouteSheet.className)
            {
                foreach (RouteSheet routeSheet in RouteSheetProxy.GetAll())
                {
                    resultString += routeSheet.GetDescription();
                    resultString += Consts.lineBreaker;
                }
            }
            return(resultString);
        }
 public override void Load()
 {
     routeSheets = RouteSheetProxy.GetAll();
 }