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There are the Uri.IsWellFormedUriString and Uri.TryCreate methods, but they seem to return true for file paths, etc.
How do I check whether a string is a valid (not necessarily active) HTTP URL for input validation purposes?
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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.
A URL is a valid URL if at least one of the following conditions holds: The URL is a valid URI reference [RFC3986]. The URL is a valid IRI reference and it has no query component. [RFC3987] The URL is a valid IRI reference and its query component contains no unescaped non-ASCII characters.
When you create a URL input with the proper type value, url , you get automatic validation that the entered text is at least in the correct form to potentially be a legitimate URL. This can help avoid cases in which the user mis-types their web site's address, or provides an invalid one.
Using java.net.url url class to validate a URL. The idea is to create a URL object from the specified String representation. If we do not get exception while creating the object, we return true. Else we return false.
Try this to validate HTTP URLs (uriName is the URI you want to test):
Uri uriResult; bool result = Uri.TryCreate(uriName, UriKind.Absolute, out uriResult) && uriResult.Scheme == Uri.UriSchemeHttp; Or, if you want to accept both HTTP and HTTPS URLs as valid (per J0e3gan's comment):
Uri uriResult; bool result = Uri.TryCreate(uriName, UriKind.Absolute, out uriResult) && (uriResult.Scheme == Uri.UriSchemeHttp || uriResult.Scheme == Uri.UriSchemeHttps); This method works fine both in http and https. Just one line :)
if (Uri.IsWellFormedUriString("https://www.google.com", UriKind.Absolute)) MSDN: IsWellFormedUriString
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