How to use QDateTime::fromString?

Question

I now, the question sounds rather silly, but I just can't get it to work. Worst example:

QString time_format = "yyyy-MM-dd  HH:mm:ss";
QDateTime a = QDateTime::currentDateTime();
QString as = a.toString(time_format);

qDebug() << as; // print "2014-07-16  17:47:04"

QDateTime b;
b.fromString(as,time_format);
assert(b.isValid()); // fails

I create a valid QDatetime, make a string out of it (that is correct) and try to turn it into a QDatetime again (using the same time_format-string). But suddenly, the string can't be parsed.

Any ideas?

score 9 · Accepted Answer · answered Jul 16 '14 at 15:57

9

fromString is a static function that returns the date; so you need to do:

QDateTime b = QDateTime::fromString(as,time_format);

in your code b never chaged from its default initialized state

answered Jul 16 '14 at 15:57

ratchet freak

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Oh. Sometimes one (me) should read the manual better. Thanks, that solved it! – FooTheBar Jul 16 '14 at 16:01
This *might* fail to work in case your system language is something other than English. – Waqar Jul 14 '20 at 13:33

score 2 · Answer 2 · edited Aug 06 '19 at 09:12

2

QString as = QDateTime::currentDateTime().toString("yyyy-MM-dd HH:mm:ss");

edited Aug 06 '19 at 09:12

Aykhan Hagverdili

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answered Sep 07 '18 at 13:14

Rajkumar

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In my case it didn't work with the ":" but when replaced with "-" it did. Whyever, just in case someone can't get it work as well. – Ben Dec 16 '22 at 11:48

How to use QDateTime::fromString?

2 Answers2