HttpWebRequest Cookie

HttpWebRequest.CookieContainer：

CookieContainer 属性提供 CookieContainer 类的一个实例，该实例包含与此请求关联的 cookie。

默认情况下，CookieContainer 为 空引用（在 Visual Basic 中为 Nothing）。必须将 CookieContainer 对象分配给该属性以在由 GetResponse 方法返回的 HttpWebResponse 的 Cookies 属性中返回 Cookie。

注意
为安全起见，默认情况下禁用 Cookie。如果您希望使用 Cookie，请使用 CookieContainer 属性启用 Cookie。

示例：

C#

using System.Net;
using System;
namespace Examples.System.Net.Cookies
{
    // This example is run at the command line.
    // Specify one argument: the name of the host to 
    // send the request to.
    // If the request is sucessful, the example displays the contents of the cookies
    // returned by the host.
    
    public class CookieExample
    {   
        public static void Main(string[] args)
        {   
            if (args == null || args.Length != 1)
            {
                Console.WriteLine("Specify the URL to receive the request.");
                Environment.Exit(1);
            }
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(args[0]);
            request.CookieContainer = new CookieContainer();
        
            HttpWebResponse response = (HttpWebResponse) request.GetResponse();
            
            

            // Print the properties of each cookie.
            foreach (Cookie cook in response.Cookies)
            {
                Console.WriteLine("Cookie:");
                Console.WriteLine("{0} = {1}", cook.Name, cook.Value);
                Console.WriteLine("Domain: {0}", cook.Domain);
                Console.WriteLine("Path: {0}", cook.Path);
                Console.WriteLine("Port: {0}", cook.Port);
                Console.WriteLine("Secure: {0}", cook.Secure);
             
                Console.WriteLine("When issued: {0}", cook.TimeStamp);
                Console.WriteLine("Expires: {0} (expired? {1})", 
                    cook.Expires, cook.Expired);
                Console.WriteLine("Don't save: {0}", cook.Discard);    
                Console.WriteLine("Comment: {0}", cook.Comment);
                Console.WriteLine("Uri for comments: {0}", cook.CommentUri);
                Console.WriteLine("Version: RFC {0}" , cook.Version == 1 ? "2109" : "2965");

                // Show the string representation of the cookie.
                Console.WriteLine ("String: {0}", cook.ToString());
            }
        }
    }
}