How to check wether a Qstring is alpha numeric

[Indrajeet]

Hi

I am using regexp in which I am alowing charactes A-Z,a-z,0-9 & special characters like '-' & '_'
But the problem is if the user sends the string as

@
"----------" or "_________"
@

so how to handle such things.

[EDIT: code formatting to trick out the formatting engine, Volker]

[goetz]

If you allow "-" and "_" as valid characters then I would regard

@
QString x = "-----------";

QString y = "_________";
@

as valid strings too.

[Indrajeet]

Hi volker

how to check that string should contain atleast one char,one number & one special character.

[GentooXativa]

Use QRegExp, check this "post":http://www.zorched.net/2009/05/08/password-strength-validation-with-regular-expressions/

I hope this help you :)