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Validates a long filename using Windows' rules. Requires one valid filename character other than "." for the first character and then any number of valid filename characters up to a total length of 255 characters. Unresolved is how to prevent the last character from being a "." while still meeting all the features that this regex does now.

this regex eleminates all parameters from a html querry e.g. param1=hans&param2=5&badparam=5 so bad param will be deleted from the params given. its usefull to clean up urls from unwanted params you not allow befor using the query string for further issues.

This RE matches the web links which begin http://, ftp://, https:// or www. You can edit this disadvantage easy...

Matches valids TCP/IP-Adresses

Regular expression to limit types of files accepted. This example matches .jpg and .gif files only.

finds the url and url description for all links in a given text.

A simple regex which should validate a domain name according to RFC 1035 updated to match domain names with hyphens

v2 A general purpose expresion to find url's (improved). Add heads to first part, example: ((imap:|(ht|f)tp(s?):\/\/)|(www\. to find url's like imap://www.com/, so ip's. No ipv6 (yet)

Finds all local links, but doesnt match on external links. Use replace with $1 to leave the link text but remove the link.

Matches filenames. UPDATED on 1st Jan 2004.

Whilst writing a plain-text to HTML function, I ran into the problem of links that users had written with <a> tags (as opposed to just writing the URL) were linking improperly. This regular expression returns many types of URL, and preceding characters, if any. This allows you to handle each type of match appropriately

First attempt at reg ex - work in progress - can't quite get it to work absolutely correctly so any comments would be great. Matches everything as it should apart from the last part of the IP, i.e. allows http://255.255.255.999 (which obviously it shouldn't but ran out of inspiration) so any corrections humbly and gratefully accepted. TLD check is not complete - just added most of the major ones but easy to dd to if you want to. BTW - you'll need to replace the & with just the ampersand in the reg ex

this is a very little regex for use within a content management software. links within textfields has not to be written in html. the editor of the cms is instructed to use it like this: 1. mention spaces in front and behind the url 2. start url with http://, mailto://, ftp:// ... 3. use optional linktext within #linktext# (separated with single space) 4. if there is no linktext the url/email will show up as linktext 5. avoid url with spaces in filename (use %20 urldecode) replace pattern (space in front): <a href="\\1\\3\\4" target="_blank">\\3\\6</a>

using match.Result("$1.$2.$3.$4") will return the assembly version of a given c# AssemblyInfo.cs file

matches IP address in hex form in dotted or not dotted notation

Use it for breaking-down a URI (URL, URN) reference into its main components: Scheme, Authority, Path, Query and Fragment. This is not a simple match regular expression. so it not works to verify a URI. It returns 1 matching group for each URI component. For example, for the following URI: http://regexlib.com/REDetails.aspx?regexp_id=x#Details returns: scheme="http", authority="regexlib.com", path="/REDetails.aspx", query="regexp_id=x" and fragment="Details". This is a W3C raccomandation (RFC 2396).

This RegEx will help to validate a physical file path with a specific file extension (here xls)

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>.

Validates a file path on your local drive or a network drive. A similar one was written by Vinod Kumar but it does not reject asterisks in the path. Moreover, his did not work with RegularExpressionValidators. This one does.