Re: RegularExpression Validation for password in ASP.NET

I'm not a regex expert either, but based on the previous post, this
seems to work:

Regex.IsMatch(
input, "(?!^[0-9]*$)(?!^[a-z]*$)(?!^[A-Z]*$)(?!^[a-z0-9]*$)(?!^[A-
Z0-9]*$)^([a-zA-Z][a-zA-Z0-9]{8,25})$")
)

============
Regards,
Steve
www.stkomp.com

bienwell wrote:
Hi all,

Can any one help me to write a regular expression to validate the password
entered on the text field in ASP.NET. The rules for the password are:
1- There must be at least one number in the password.
2- There must be upper and lower case letters in the password.
3- Password must begin with an alphabetic character.
4- Password cannot contain illegal characters, such as =, <, >, ;, :, '
, " or comma (equal sign, greater sign, less than sign, semicolon, colon,
single quote, double quotes, comma).
5- Password must be between 8 and 25 characters.

I'm not good at writing the expression. Please help me out.

Thanks in advance.
.

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