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WebClient.WebClient Constructor

Initializes a new instance of the WebClient class.

Namespace: System.Net
Assembly: System (in system.dll)

public WebClient ()
public WebClient ()
public function WebClient ()
Not applicable.

The default constructor creates a new instance of the WebClient class. The default HTTP method is GET. The default FTP method is RETR. The default Encoding is Default. The default value of AllowAutoRedirect is true.

The following code example creates a WebClient instance and then uses it to download data from a server and display it on the system console, to download data from a server and write it to a file, and to upload form values to a server and receive the response.

try {
    
// Download the data to a buffer.
       WebClient client = new WebClient();

  Byte[] pageData = client.DownloadData("http://www.contoso.com");
string pageHtml = Encoding.ASCII.GetString(pageData);
Console.WriteLine(pageHtml);

// Download the data to a file.
        client.DownloadFile("http://www.contoso.com", "page.htm");

// Upload some form post values.
NameValueCollection form = new NameValueCollection();        
form.Add("MyName", "MyValue");        
Byte[] responseData = client.UploadValues("http://www.contoso.com/form.aspx", form);        

}
catch (WebException webEx) {
      Console.WriteLine(webEx.ToString());
       if(webEx.Status == WebExceptionStatus.ConnectFailure) {
           Console.WriteLine("Are you behind a firewall?  If so, go through the proxy server.");
       }
}

try {
    // Download the data to a buffer.
    WebClient client = new WebClient();

    ubyte pageData[] = client.DownloadData("http://www.contoso.com");
    String pageHtml = Encoding.get_ASCII().GetString(pageData);
    Console.WriteLine(pageHtml);
    // Download the data to a file.
    client.DownloadFile("http://www.contoso.com", "page.htm");
    // Upload some form post values.
    NameValueCollection form = new NameValueCollection();
    form.Add("MyName", "MyValue");
    ubyte responseData[] = client.UploadValues(
        "http://www.contoso.com/form.aspx", form);
}
catch (WebException webEx) {
    Console.WriteLine(webEx.ToString());
    if (webEx.get_Status().Equals(WebExceptionStatus.ConnectFailure)) {
        Console.WriteLine("Are you behind a firewall?  If so, go" 
            + " through the proxy server.");
    }
}

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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