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In my asp.net application, i need to validate the text for a valid website link. I want to use the regular expression validator for that. Anyone with any idea of how to validate the weblink user regex.
333
You can use the URLConstructor to check if a string is a valid URL. URLConstructor ( new URL(url) ) returns a newly created URL object defined by the URL parameters. A JavaScript TypeError exception is thrown if the given URL is not valid.
$ means "Match the end of the string" (the position after the last character in the string). Both are called anchors and ensure that the entire string is matched instead of just a substring.
A string is a valid URL potentially surrounded by spaces if, after stripping leading and trailing whitespace from it, it is a valid URL. A string is a valid non-empty URL potentially surrounded by spaces if, after stripping leading and trailing whitespace from it, it is a valid non-empty URL.
try this -
^(?:ftp|http|https):\/\/(?:[\w\.\-\+]+:{0,1}[\w\.\-\+]*@)?(?:[a-z0-9\-\.]+)(?::[0-9]+)?(?:\/|\/(?:[\w#!:\.\?\+=&%@!\-\/\(\)]+)|\?(?:[\w#!:\.\?\+=&%@!\-\/\(\)]+))?$
Explained each step below -
^ # Start at the beginning of the text
(?:ftp|http|https):\/\/ # Look for ftp, http, or https
(?: # Username:password combinations (optional)
[\w\.\-\+]+ # A username
:{0,1} # an optional colon to separate the username and password
[\w\.\-\+]*@ # A password
)?
(?:[a-z0-9\-\.]+) # The domain limiting it to just allowed characters
(?::[0-9]+)? # Server port number
(?: # The path (optional)
\/| # a forward slash
\/(?:[\w#!:\.\?\+=&%@!\-\/\(\)]+)| # or a forward slash followed by a full path
\?(?:[\w#!:\.\?\+=&%@!\-\/\(\)]+) # or a question mark followed by key value pairs
)?$
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