How to check whether a string is a valid HTTP URL?

Question

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?

Answer 1

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); 

Answer 2

This method works fine both in http and https. Just one line :)

if (Uri.IsWellFormedUriString("https://www.google.com", UriKind.Absolute)) 

MSDN: IsWellFormedUriString