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How to: Extract a Protocol and Port Number from a URL

.NET Framework 3.0

.NET Framework 4.5
.NET Framework 4
.NET Framework 1.1
.NET Framework 3.5
.NET Framework 2.0

The following code example uses Match.Result to extract a protocol and port number from a URL. For example, "http://www.contoso.com:8080/letters/readme.html" would return "http:8080".

Example

    String Extension(String url) 
    {
        Regex r = new Regex(@"^(?<proto>\w+)://[^/]+?(?<port>:\d+)?/",
            RegexOptions.Compiled);
        return r.Match(url).Result("${proto}${port}"); 
    }

How to: Extract a Protocol and Port Number from a URL

Example

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