Error with QList
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Hi gogoi
you might have to be a little more specific on your error (message).
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thanks all error is solved..
regards
gogoi -
Do you mind to enlight us?
How did you solve your problem? -
Her/His list variable was QList<QString> type and not QList<Login> type.
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hey friends,can anybody help me out in how shall i append the username and passwd data into the list..
regards
gogoi -
"see append function":http://doc.qt.nokia.com/latest/qlist.html#append
In your code ... :
@
QList<Login> loginsList;
Login login = {"userName", "password"};
loginsList.append(login);
@ -
ok thanks cincirin,I will read it and get back to u.
regards
gogoi -
hey cincirin,
suppose i want to take username and password from userinput..then how shall i do it..
I mean..QList<Login> loginsList;
Login login = {ui->lineEdit->text(), ui->lineEdit_2->text()};
loginsList.append(login);regards
gogoi -
Yes, it's ok.
Or, if you want to add more Logins in your list, create only one instance of Login
@
Login login;login.userName = ui->lineEdit->text();
login.password = ui->lineEdit_2->text();
loginsList.append(login);login.userName = ui->lineEdit->text();
login.password = ui->lineEdit_2->text();
loginsList.append(login);
@ -
@void MainWindow::readSettings()
{QList<Login> logins; QSettings settings; int size = settings.beginReadArray("logins"); for (int i = 0; i < size; ++i) { settings.setArrayIndex(i); Login login; login.userName = settings.value(("userName").toString(),ui->lineEdit->setText()); login.password = settings.value(("password").toString(),ui->lineEdit_2->settext()); logins.append(login); } settings.endArray();
}@
can i do it this way cincirin..
regards
gogoi -
No, you can't.
You need to separate @QSettings::value@ from @QlineEdit::setText@
@
void MainWindow::readSettings()
{
QList<Login> logins;
QSettings settings;
int size = settings.beginReadArray("logins");
for (int i = 0; i < size; ++i) {
settings.setArrayIndex(i);
Login login;
login.userName = settings.value(("userName").toString();
ui->lineEdit->setText(login.userName));
login.password = settings.value(("password").toString();
ui->lineEdit_2->settext(login.password));logins.append(login); } settings.endArray();
}
@ -
thanks cincirin...then how shall i write in writesettings function..because when i debug..the login size is showing zero only
regards
gogoi -
In a similar manner as read settings.
But I think your problem is that you want to use the same list both in read & write settings. In this case, your problem C++ and not Qt. So, if I'm right, you need to declare QList<Login> member of your class, and not separate instances in read&write functions. -
ya i have not created two instance of QList<login>..
please check out this@void MainWindow::saveSettings()
{QSettings settings; settings.beginWriteArray("logins"); for (int i = 0; i < logins.size(); ++i) { settings.setArrayIndex(i); settings.setValue("userName", list.at(i).userName); Login login; ui->lineEdit->settext(login.userName); settings.setValue("password", list.at(i).password); ui->lineEdit_2->settext(login.password); } settings.endArray();
}
@regards
gogoi -
In your 10 and 13 lines, both line edits will have blank text. Use list.at(i) instead of local login variable.
If your list is member of MainWindow class, or if it's global in MainWindow.cpp, your code should be ok, if you remove line 9. -
hey thanks for the info..i did that,,but no effect ,my .ini file shows only this output..
[logins]
size=0regards
gogoi -
If you have @QList<Login> m_logins@ member in your MainWindow class, and if in read function you'll use m_logins.append, I'm sure that write function will write in ini file as many Login as you appended before.
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No cincirin..I coded the 2 functions according to your suggestions..but its not entering the loop in the savesettings function..and everytime it says size=0;//
so i think on click of a button we shouls set the username and passwd..
this way..
@void MainWindow::on_set_clicked()
{login.userName=ui->lineEdit->text(); login.password=ui->lineEdit_2->text(); logins.append(login);
}@
i dont know whether i m right or wrong..u please just check out//
regards
gogoi -
Ok, in the following code if you call Test::count function, you'll see as many Login as you appended:
@
class Test
{
public:
void append();
int count()const;protected:
struct Login
{
QString userName;
QString password;
};QList<Login> m_loginsList;
};
void Test::append()
{
Login log = {"user", "pwd"};
m_loginsList.append(log);
}int Test::count()const
{
return m_loginsList.size();
}int main(int argc, char *argv[])
{
Test t;
t.append(); // one item
t.append(); // two items
// ...
qDebug("%d", t.count()); // print how many items are in list
return 0;
}
@ -
ok.thanks..so whether my code is correct..?
hey now my ini file is showing..the data which i input through the lineedit..but the username and password are not appending in the list..I mean the next time when i run and enter usrname and passwd..the previous username and password will be lost..
regards
gogoi