Monday, August 28

Good & tested RegularExpression for validating passwords?

Any sample tested and working Regular expression for validating the password?

I was using
ID="RequiredFieldValidator1" runat="server"
ErrorMessage="Please enter password" ControlToValidate="txtPassword" Display="none">

ID="regValPassword" runat="server"
ErrorMessage="Enter valid password" Display="None"
ControlToValidate="txtPassword" ValidationExpression="^\w{3,12}$">

for basic filtering

any better thoughts for allowing 8-12 char passwords with special characters too?

I found some scripts on the net but they didn't seem to work with's RegularExpressionValidator

Thoughts welcome.

Since . matches any character including special characters but not linefeed and carriage return, shouldn't the regex be:


Or, if you want to exclude certain special characters, then you can use a negated character class instead of the period. For example, to exclude the greater than sign:


Is this similar to what you are looking for?

You probably already have this link, but here goes anyway: is an online regex tester that uses the .Net regex engine itself. It is a nice playground for testing out regular expressions.
thanks sougata. I will need it to get the exact regular expression.

I ended up creating a user control consisting of a label,textbox, RequiredFieldValidator, RangeValidator and RegularExpression validator.

my attemp at a reusable numeric textbox. ;)
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