QRegExp

Amarda_4

Please help !!! I'm trying this code for regular expressions,but it always returns false...Any idea ?? Thank You !!
@if (user.contains(QRegExp("/^[a-z0-9]$/")))
{
QMessageBox::information (this, "Validation", "Valide !");}
else

           {

          QMessageBox::warning(this, "Kujdes", "Te dhenat tuaja jane te pasakta.\n Riprovo perseri.");
 }

}@

SGaist

Hi,

Please don't multi-post on the forum.

What is your input and what are trying to find ?

Amarda_4

I'm sorry about the multi-post.it was accidentally.
I'm trying to make a check if a user inputs for example characters like !@#$%^ ..it should input just characters and numbers..not other characters..what should I do ?
Thank You

SGaist

First, have a look at the QRegExp doc, they provide nice examples

Also note that your test is wrong: your string should be invalid if it contains something else than a-z0-9. In other words: you must search for what it should not contain.

Amarda_4

I've also tried if @(!user.contains(QRegExp("/^[a-z0-9]$/")))@
But it still doesn't work.

SGaist

Why do you have these two / ?

Without them your regexp mean: Start of line, one lower case letter or a number, end of line. Not really what you want.

You can test and validate your regexp with the regexp example in qt_sources/examples/tools/regexp

Amarda_4

@QRegExp mailREX("^[A-Z0-9]{10}$");@
This was the right way to work..now it lets me just to enter case letter or a number,with a length of 10 characters..

SGaist

If you want to constrain your user's input, have a look at "QRexExpValidator":http://qt-project.org/doc/qt-4.8/qregexpvalidator.html