C# 3.0 Cookbook, 3rd Edition

14.3. Parsing a URI

Problem

You need to split a uniform resource identifier (URI) into its constituent parts.

Solution

Construct a System.Net.Uri object and pass the URI to the constructor. This class constructor parses out the constituent parts of the URI and allows access to them via the Uri properties. You can then display the URI pieces individually, as shown in Example 14-1.

Example 14-1. ParseURI method

public static void ParseUri(Uri uri)
{
    try
    {

        // System.Net.Uri class constructor has parsed it for us.
        // new Uri("http://user:password@localhost:8080/www.abc.com/
        //   home%20page.htm?item=1233#stuff")

        StringBuilder uriParts = new StringBuilder( );
        uriParts.AppendFormat("AbsoluteURI: {0}{1}",
                            uri.AbsoluteUri,Environment.NewLine);
        uriParts.AppendFormat("AbsolutePath: {0}{1}",
                            uri.AbsolutePath,Environment.NewLine);
        uriParts.AppendFormat("Scheme: {0}{1}",
                            uri.Scheme,Environment.NewLine);
        uriParts.AppendFormat("UserInfo: {0}{1}",
                            uri.UserInfo,Environment.NewLine);
        uriParts.AppendFormat("Authority: {0}{1}",
                            uri.Authority,Environment.NewLine);
        uriParts.AppendFormat("DnsSafeHost: {0}{1}", uri.DnsSafeHost,Environment.NewLine); uriParts.AppendFormat("Host: {0}{1}", uri.Host,Environment.NewLine); uriParts.AppendFormat("HostNameType: {0}{1}", uri.HostNameType.ToString( ),Environment.NewLine); uriParts.AppendFormat("Port: {0}{1}",uri.Port,Environment.NewLine); uriParts.AppendFormat("Path: {0}{1}",uri.LocalPath,Environment.NewLine); uriParts.AppendFormat("QueryString: {0}{1}",uri.Query,Environment.NewLine); ...