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HttpListenerResponse.Cookies Property

Note: This property is new in the .NET Framework version 2.0.

Gets or sets the collection of cookies returned with the response.

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

public:
property CookieCollection^ Cookies {
	CookieCollection^ get ();
	void set (CookieCollection^ value);
}
/** @property */
public CookieCollection get_Cookies ()

/** @property */
public void set_Cookies (CookieCollection value)

public function get Cookies () : CookieCollection

public function set Cookies (value : CookieCollection)

Property Value

A CookieCollection that contains cookies to accompany the response. The collection is empty if no cookies have been added to the response.

A cookie is name/value text data from a Web server that is stored on the local (client) computer. The following cookie formats are supported: Netscape, RFC 2109, and RFC 2965. The Netscape cookie specification is available at http://wp.netscape.com/newsref/std/cookie_spec.html; the RFC documents are available at http://www.rfc-editor.org.

The following code example checks a request for a cookie, and returns a new cookie with the response if the request did not have one.

// This example requires the System and System.Net namespaces.

public static string NextCustomerID()
{
    // A real-world application would do something more robust
    // to ensure uniqueness.
    return DateTime.Now.ToString();
}
public static void SimpleListenerCookieExample(string[] prefixes)
{
    // Create a listener.
    HttpListener listener = new HttpListener();
    // Add the prefixes.
    foreach (string s in prefixes)
    {
        listener.Prefixes.Add(s);
    }
    listener.IgnoreWriteExceptions = true;
    listener.Start();
    Console.WriteLine("Listening...");
    // Note: The GetContext method blocks while waiting for a request. 
    HttpListenerContext context = listener.GetContext();
    HttpListenerRequest request = context.Request;
    string customerID = null;

    // Did the request come with a cookie?
    Cookie cookie = request.Cookies["ID"];
    if (cookie != null)
    {
         customerID=cookie.Value;
    }
    if (customerID !=null)
    {
          Console.WriteLine("Found the cookie!");
    }
    // Get the response object.
    HttpListenerResponse response = context.Response;
    // If they didn't provide a cookie containing their ID, give them one.
    if (customerID == null)
    {
        customerID = NextCustomerID();
        Cookie cook = new Cookie("ID", customerID );
        response.AppendCookie (cook);
    }
    // Construct a response.
    string responseString = "<HTML><BODY> Hello " + customerID + "!</BODY></HTML>";
    byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString);
    // Get the response stream and write the response to it.
    response.ContentLength64 = buffer.Length;
    System.IO.Stream output = response.OutputStream;
    output.Write(buffer,0,buffer.Length);
    // You must close the output stream.
    output.Close();
    // Closing the response sends the response to the client.
    response.Close();
    listener.Stop();
}

Windows 98, Windows Server 2003, Windows XP Media Center Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

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