Csharp/CSharp Tutorial/Network/Uri

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Reading Web Pages from a Uri

using System;
using System.Net;
using System.IO;
using System.Text;

class MainClass
{
    public static void Main(string[] args)
    {
        Uri uri = new Uri("http://www.nfex.ru");
        
        
        WebRequest req = WebRequest.Create(uri);
        WebResponse resp = req.GetResponse();
        Stream stream = resp.GetResponseStream();
        StreamReader sr = new StreamReader(stream);
        
        string s = sr.ReadToEnd();
        
        Console.WriteLine(s);
    }
}
<HTML>
<HEAD>
     Java examples (example source code) Organized by topic </title>
...
...

Use a regular expression to extract all fully qualified URIs that refer to HTM files

using System;
using System.IO;
using System.Net;
using System.Text.RegularExpressions;
class MainClass
{
    private static void Main() 
    {
        string remoteUri = "http://www.nfex.ru";
        
        WebClient client = new WebClient();
        Console.WriteLine("Downloading {0}", remoteUri);
        string str = client.DownloadString(remoteUri);
        MatchCollection matches = Regex.Matches(str,@"http\S+[^-,;:?]\.htm");
        
        foreach(Match match in matches) 
        {
            foreach(Group grp in match.Groups) 
            {
                string file = grp.Value.Substring(grp.Value.LastIndexOf("/")+1);
                Console.WriteLine(file);
            }
        }
    }
}
Downloading http://www.nfex.ru
CatalogJava.htm
^CTerminate batch job (Y/N)? n

Use Uri

using System; 
using System.Net; 
 
class MainClass {  
  public static void Main() { 
 
    Uri sample = new Uri("http://www.yoursite.ru/somefile.txt?SomeQuery"); 
 
    Console.WriteLine("Host: " + sample.Host); 
    Console.WriteLine("Port: " + sample.Port); 
    Console.WriteLine("Scheme: " + sample.Scheme); 
    Console.WriteLine("Local Path: " + sample.LocalPath); 
    Console.WriteLine("Query: " + sample.Query); 
    Console.WriteLine("Path and query: " + sample.PathAndQuery); 
 
  } 
}
Host: www.yoursite.ru
Port: 80
Scheme: http
Local Path: /somefile.txt
Query: ?SomeQuery
Path and query: /somefile.txt?SomeQuery
Источник — «http://nfex.ru/index.php?title=Csharp/CSharp_Tutorial/Network/Uri&oldid=6860»