I am new to programming and I am trying below code in Flutter:
DateTime dt2 = DateTime.parse(strDateToCompare).toLocal();
where value of strDateToCompare is 14 Nov 2022
It gives me below error:
FormatException: Invalid date format 14 Nov 2022
I think I am doing some silly mistake here. What might be the issue? Thanks in advance.
CodePudding user response：
the DateTime.parse() parse can only accept format like this:
"2012-02-27"
"2012-02-27 13:27:00"
"2012-02-27 13:27:00.123456789z"
"2012-02-27 13:27:00,123456789z"
"20120227 13:27:00"
"20120227T132700"
"20120227"
" 20120227"
"2012-02-27T14Z"
"2012-02-27T14 00:00"
"-123450101 00:00:00 Z": in the year -12345.
"2002-02-27T14:00:00-0500"
so in order to use it, you need to turn your 14 Nov 2022 to a properly accepted format like 2022-11-14, so you can use it like this:
DateTime dt2 = DateTime.parse(`2022-11-14`).toLocal(); //
and you can transform 14 Nov 2022 to 2022-11-14, with this helper method, without using an external package:
String properFormatForDate(String invalidFormat) {
int index= 1;
final monthsAbbr = Map.fromIterable(
[
"jan",
"feb",
"mar",
"apr",
"may",
"jun",
"jul",
"aug",
"sep",
"oct",
"nov",
"dec"
],
key: (e) => e,
value: (e) => index ,
);
final listSeparated = invalidFormat.split(" ").reversed.toList();
int monthInNumber = monthsAbbr[listSeparated[1].toLowerCase()]! ;
listSeparated[1] = monthInNumber.toString();
return listSeparated.join("-");
}
print(properFormatForDate("14 Nov 2022")); // 2022-11-14
CodePudding user response：
try this
first you have to understand the format works: see code below
import 'package:intl/intl.dart';
void main() {
final a = DateFormat('d MMM y').format(DateTime.now());
print(a); // 22 Nov 2022
DateTime temp = DateFormat('d MMM y').parse(a);
print(temp); //. 2022-11-22 00:00:00.000
/// now you can use that format:
DateTime dt2 = DateFormat('d MMM y').parse('14 Nov 2022').toLocal();
print(dt2); // 2022-11-14 00:00:00.000
}