private bool IsSaveEnabled()
{
bool validReservation = ReservationId.Validate();
bool validSum = TransactionSum.Validate(true);
bool validDate = TransactionDate.SelectedDate != null;
bool validType = Validate(TransactionMethod);
bool validRemaining = Validate(RemainingSum);
return(validReservation && validSum && validDate && validType && validRemaining);
}
