需要Flex Regex验证表达式的密码，只允许字母数字值，并需要一个数字

Hi I'm trying to setup a RegexpValidator that only accepts a string of alphanumeric characters between 6-30 characters long and requires one number. I'm new to Regular Expressions and everything I've tried seems to keep returning an invalid ValidationRsultEvent. Here's a chunk of code:Hi I'm trying to setup a RegexpValidator that o