Writing my own object to a binary file.
-
Hi,
I want to write my own object to the binary file. But I receive the message:
[QUOTE]C:\Qt\Qt5.1.1\5.1.1\mingw48_32\include\QtCore\qdatastream.h:300: error: no match for 'operator<<' (operand types are 'QDataStream' and 'const User')
s << *it;
^[/QUOTE][CODE]
void Dialog::on_btnWrite_clicked()
{
QString nike = ui->wleNike->text();
QString password = ui->wlePassword->text();
QString firstName = ui->wleFirstName->text();
QString lastName = ui->wleLastName->text();
int age = ui->wspAge->text().toInt();User user; user.nike = nike; user.password = password; user.firstName = firstName; user.lastName = lastName; user.age = age; QVector<User> users; users.push_back(user); QString fileName = "c:/users.txt"; QFile file(fileName); QDataStream out(&file); out.setVersion(QDataStream::Qt_5_1); out << users; file.flush(); file.close();
}
[/CODE]Thank you!
-
Yes, you must define your own appropriate stream operators declared as non-member of the class
@
QDataStream &operator<<(QDataStream &, const User &);
QDataStream &operator>>(QDataStream &, User &);
@before you can use them.
-
Thank you! I'll try :)