validatMonthDayYear method

String? validatMonthDayYear(
  1. String value
)

Implementation

String? validatMonthDayYear(String value) {
//day/month/year
  //([0-2][0-9]|(3)[0-1])[-|\/](((0)[0-9])|((1)[0-2]))[-|\/]\d{4}
  if (value.isEmpty) return "Please enter month and year";
  Pattern pattern = r'^(((0)[0-9])|((1)[0-2]))[/]\d{2}';
  RegExp regex = RegExp("$pattern");
  if (!regex.hasMatch(value.trim())) {
    return "eg. mm/yy";
  }
  return null;
}