using System;

 using System.Web;

 namespace ConsoleApplication5

 {

     /// <summary>

     /// Cookie 助手

     /// </summary>

     public sealed class CookieHelper

     {

         /// <summary>

         /// 添加一个 Cookie

         /// </summary>

         /// <param name="name">名</param>

         /// <param name="value">值</param>

         public static void Add(string name, string value)

         {

             var cookie = new HttpCookie(name, value);

             HttpContext.Current.Response.Cookies.Add(cookie);

         }

         /// <summary>

         /// 添加一个 Cookie

         /// </summary>

         /// <param name="name">名</param>

         /// <param name="value">值</param>

         /// <param name="expires">过期日期和时间</param>

         public static void Add(string name, string value, DateTime expires)

         {

             var cookie = new HttpCookie(name, value)

             {

                 Expires = expires

             };

             HttpContext.Current.Response.Cookies.Add(cookie);

         }

         /// <summary>

         /// 获取 Cookie 值

         /// </summary>

         /// <param name="name">名</param>

         /// <returns></returns>

         public static string Get(string name)

         {

             var cookie = HttpContext.Current.Request.Cookies[name];

             return cookie == null ? string.Empty : cookie.Value;

         }

     }

 }