Hi,
anyone who could help me with a regular expression for a password which has these requirements:
- max 15 characters (both text,numbers and other characters like _ % etc)
- cannot contain comma or semi-colon ( , ;). All other characters are allowed.

Doesn't seem too complicated, but i have no experience with regular expressions, so any help is really appreciated!

Have you tried google yet? There are many online resources for learning regular expressions.

-Peter
compiledthoughts.com

This is pretty simple, as you have stated it:
    "^[^\,\;\s]{1,15}$"
or, if using C#:
    "^[^\\,\\;\\s]{1,15}$"

I also disallowed spaces (besides comma and semicolon).

But are you SURE this is what you want? It means that all of the following passwords are *LEGAL*:
    a
    ?
    Â©
    Â©Â©Â©Â©Â©
    ?©
    1
    Â©Â©Â©Â©Â©Â©Â©Â©Â©Â©Â©Â©Â©Â©Â©Â©Â©Â©

Is that REALLY what you want????

Most companies are much more restrictive. MS rules, for example:

Minimum of 6 characters, maximum of 18 [not sure about that max]
Must contain at least one upper case letter
Must contain at least one lower case letter
Must contain at least one digit
Must contain at least one non-alphanumeric character [I think chosen from a list, but not sure]

Now *THAT* is a much more reasonable "strong password". And it's also a much much tougher regular expression, though I believe it *is* doable.

[By the way: Why are comma and semicolon, of all things, disallowed??? I would see apostrophes and maybe quotes, but those characters? Why?]