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This pattern allows standard e-mail addresses (e.g. [email protected]), sub domains (e.g. [email protected]), the new two- and four-letter domains (e.g. [email protected] and [email protected]) and country codes (e.g. [email protected]). Also, this patter follows the Network Solutions standard length of 67 characters for top-level domains. The reason I allow numbers to be entered in the domain suffix is for future planning. If you do not want numbers to be able to be added as a domain suffix (e.g. [email protected]), simply delete the last two occurrences of "\d".

Validate a string to see if it contains a number / integer

Credit card validator. Just checks that the format is either 16 numbers in groups of four separated by a "-" or a " " or nothing at all.

Matches major credit cards including: Visa (length 16, prefix 4), Mastercard (length 16, prefix 51-55), Discover (length 16, prefix 6011), American Express (length 15, prefix 34 or 37). All 16 digit formats accept optional hyphens (-) between each group of four digits.

Matches any string between 4 and 8 characters in length. Limits the length of a string. Useful to add to password regular expressions.

Accepts an unsigned integer number. Also matches empty strings.

Matches any integer number or numeric string, including positive and negative value characters (+ or -). Also matches empty strings.

Matches any unsigned floating point number/numeric string. Also matches empty strings.

Matches any floating point numer/numeric string, including optional sign character (+ or -). Also matches empty strings.

GUID Tester. It tests SQL Server GUIDs, which are alphanumeric characters grouped 8-4-4-4-12 (with the dashes). Make sure they don't have the brackets around them before you check them and have fun!

Validates an email address

Plucks the last quote of a Stock from the MSN MoneyCentral WebQuote page for any given stock symbol. The URL of the web page where this RegEx should be applied is: http://localhost/asp/webquote.htm?ipage=qd&Symbol=,give the stock symbol here> You must also use the singleline option.

Matches US phone number format. 1 in the beginning is optional, area code is required, spaces or dashes can be used as optional divider between number groups. Also alphanumeric format is allowed after area code.

Matches a string if it is a valid time in the format of HH:MM

This expression checks the validity of a date (US, but it is easily editable for other format's). Year's 1990-9999, Month's 1 or 01 to 12, Day's 1 or 01 to 31. Still needs to have individual months added (i.e., Feb's 28 days), and some how to check for leap year...the months issue should not be to hard, but the leap year seems like a real chore. Please let me know if you have any suggestions for leap year.

US Phone number that accept a dot, a space, a dash, a forward slash, between the numbers. Will Accept a 1 or 0 in front. Area Code not necessary

Any Expression Upper/Lower Case, with commas and space between the text, with any amount of space before or after

ANY alphanumeric string with spaces, commas, dashes.

This can be used in conjunction with the replace method to provide pseudo-code support without having to enable HTML. The replacement string (in ASP.NET, use RegExp.Replace(SourceString, RegularExpressionPattern, ReplacementString) is <a href="${link}">${text}</a>.

Dutch zip code expression 4 numbers - space yes/no - 2 letters