QDateTime dt; if (dt.isNull()) { // handle error case } else { // do something with dt }
QDateTime dt = QDateTime::fromString("2022-01-01 12:00:00", "yyyy-MM-dd hh:mm:ss"); if (dt.isNull()) { qDebug() << "dt is null"; } // assign a valid datetime value later dt = dt.addDays(1); qDebug() << "dt is now" << dt.toString();Package Library: The QDateTime class is part of the Qt Core library, so you need to include the relevant header file (e.g. #include