beforeEventDateOrSame function

String? beforeEventDateOrSame(
  1. {required String eventDate,
  2. required String selectedDate}
)

Implementation

String? beforeEventDateOrSame(
    {required String eventDate, required String selectedDate}) {
  DateTime eD = DateTime.parse(convertDate(eventDate));
  DateTime date = DateTime.parse(convertDate(selectedDate));
  if (date.isAfter(eD)) {
    return "Please select date before event date";
  }
  return null;
}