Code C# le plus rapide pour télécharger une page Web

Question

Étant donné une URL, quel serait le code le plus efficace pour télécharger le contenu de cette page Web? Je ne considère que le HTML, pas les images associées, JS et CSS.

Answer 1

public static void DownloadFile(string remoteFilename, string localFilename) 
{ 
    WebClient client = new WebClient(); 
    client.DownloadFile(remoteFilename, localFilename); 
} 

Answer 2

System.Net.WebClient

De MSDN:

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

public class Test 
{ 
    public static void Main (string[] args) 
    { 
     if (args == null || args.Length == 0) 
     { 
      throw new ApplicationException ("Specify the URI of the resource to retrieve."); 
     } 
     WebClient client = new WebClient(); 

     // Add a user agent header in case the 
     // requested URI contains a query. 

     client.Headers.Add ("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)"); 

     Stream data = client.OpenRead (args[0]); 
     StreamReader reader = new StreamReader (data); 
     string s = reader.ReadToEnd(); 
     Console.WriteLine (s); 
     data.Close(); 
     reader.Close(); 
    } 
} 

Answer 3

Utilisez la classe WebClient de System.Net; sur .NET 2.0 et supérieur.

WebClient Client = new WebClient(); 
Client.DownloadFile("http://mysite.com/myfile.txt", " C:\myfile.txt"); 

Answer 4

voici ma réponse, une méthode qui prend une URL et retourne une chaîne

public static string downloadWebPage(string theURL) 
    { 
     //### download a web page to a string 
     WebClient client = new WebClient(); 

     client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)"); 

     Stream data = client.OpenRead(theURL); 
     StreamReader reader = new StreamReader(data); 
     string s = reader.ReadToEnd(); 
     return s; 
    } 

Answer 5

WebClient.DownloadString

public static void DownloadString (string address) 
{ 
    WebClient client = new WebClient(); 
    string reply = client.DownloadString (address); 

    Console.WriteLine (reply); 
}