.NET的Cookie相关操作

 using System;
 using System.Collections.Generic;
 using System.Text;
 using System.Web;

 namespace Comm
 {
     public class CookiesHelper
     {

         #region 获取Cookie

         /// <summary>
         /// 获得Cookie的值
         /// </summary>
         /// <param name="cookieName"></param>
         /// <returns></returns>
         public static string GetCookieValue(string cookieName)
         {
             return GetCookieValue(cookieName, null);
         }

         /// <summary>
         /// 获得Cookie的值
         /// </summary>
         /// <param name="cookieName"></param>
         /// <param name="key"></param>
         /// <returns></returns>
         public static string GetCookieValue(string cookieName, string key)
         {
             HttpRequest request = HttpContext.Current.Request;
             if (request != null)
                 return GetCookieValue(request.Cookies[cookieName], key);
             return "";
         }

         /// <summary>
         /// 获得Cookie的子键值
         /// </summary>
         /// <param name="cookie"></param>
         /// <param name="key"></param>
         /// <returns></returns>
         public static string GetCookieValue(HttpCookie cookie, string key)
         {
             if (cookie != null)
             {
                 if (!string.IsNullOrEmpty(key) && cookie.HasKeys)
                     return cookie.Values[key];
                 else
                     return cookie.Value;
             }
             return "";
         }

         /// <summary>
         /// 获得Cookie
         /// </summary>
         /// <param name="cookieName"></param>
         /// <returns></returns>
         public static HttpCookie GetCookie(string cookieName)
         {
             HttpRequest request = HttpContext.Current.Request;
             if (request != null)
                 return request.Cookies[cookieName];
             return null;
         }

         #endregion

         #region 删除Cookie

         /// <summary>
         /// 删除Cookie
         /// </summary>
         /// <param name="cookieName"></param>
         public static void RemoveCookie(string cookieName)
         {
             RemoveCookie(cookieName, null);
         }

         /// <summary>
         /// 删除Cookie的子键
         /// </summary>
         /// <param name="cookieName"></param>
         /// <param name="key"></param>
         public static void RemoveCookie(string cookieName, string key)
         {
             HttpResponse response = HttpContext.Current.Response;
             if (response != null)
             {
                 HttpCookie cookie = response.Cookies[cookieName];
                 if (cookie != null)
                 {
                     if (!string.IsNullOrEmpty(key) && cookie.HasKeys)
                         cookie.Values.Remove(key);
                     else
                         response.Cookies.Remove(cookieName);
                 }
             }
         }

         #endregion

         #region 设置/修改Cookie

         /// <summary>
         /// 设置Cookie子键的值
         /// </summary>
         /// <param name="cookieName"></param>
         /// <param name="key"></param>
         /// <param name="value"></param>
         public static void SetCookie(string cookieName, string key, string value)
         {
             SetCookie(cookieName, key, value, null);
         }

         /// <summary>
         /// 设置Cookie值
         /// </summary>
         /// <param name="key"></param>
         /// <param name="value"></param>
         public static void SetCookie(string key, string value)
         {
             SetCookie(key, null, value, null);
         }

         /// <summary>
         /// 设置Cookie值和过期时间
         /// </summary>
         /// <param name="key"></param>
         /// <param name="value"></param>
         /// <param name="expires"></param>
         public static void SetCookie(string key, string value, DateTime expires)
         {
             SetCookie(key, null, value, expires);
         }

         /// <summary>
         /// 设置Cookie过期时间
         /// </summary>
         /// <param name="cookieName"></param>
         /// <param name="expires"></param>
         public static void SetCookie(string cookieName, DateTime expires)
         {
             SetCookie(cookieName, null, null, expires);
         }

         /// <summary>
         /// 设置Cookie
         /// </summary>
         /// <param name="cookieName"></param>
         /// <param name="key"></param>
         /// <param name="value"></param>
         /// <param name="expires"></param>
         public static void SetCookie(string cookieName, string key, string value, DateTime? expires)
         {
             HttpResponse response = HttpContext.Current.Response;
             if (response != null)
             {
                 HttpCookie cookie = response.Cookies[cookieName];
                 if (cookie != null)
                 {
                     if (!string.IsNullOrEmpty(key) && cookie.HasKeys)
                         cookie.Values.Set(key, value);
                     else
                         if (!string.IsNullOrEmpty(value))
                             cookie.Value = value;
                     if (expires != null)
                         cookie.Expires = expires.Value;
                     response.SetCookie(cookie);
                 }
             }

         }

         #endregion

         #region 添加Cookie

         /// <summary>
         /// 添加Cookie
         /// </summary>
         /// <param name="key"></param>
         /// <param name="value"></param>
         public static void AddCookie(string key, string value)
         {
             AddCookie(new HttpCookie(key, value));
         }

         /// <summary>
         /// 添加Cookie
         /// </summary>
         /// <param name="key"></param>
         /// <param name="value"></param>
         /// <param name="expires"></param>
         public static void AddCookie(string key, string value, DateTime expires)
         {
             HttpCookie cookie = new HttpCookie(key, value);
             cookie.Expires = expires;
             AddCookie(cookie);
         }

         /// <summary>
         /// 添加为Cookie.Values集合
         /// </summary>
         /// <param name="cookieName"></param>
         /// <param name="key"></param>
         /// <param name="value"></param>
         public static void AddCookie(string cookieName, string key, string value)
         {
             HttpCookie cookie = new HttpCookie(cookieName);
             cookie.Values.Add(key, value);
             AddCookie(cookie);
         }

         /// <summary>
         /// 添加为Cookie集合
         /// </summary>
         /// <param name="cookieName">Cookie名称</param>
         /// <param name="expires">过期时间</param>
         public static void AddCookie(string cookieName, DateTime expires)
         {
             HttpCookie cookie = new HttpCookie(cookieName);
             cookie.Expires = expires;
             AddCookie(cookie);
         }

         /// <summary>
         /// 添加为Cookie.Values集合
         /// </summary>
         /// <param name="cookieName"></param>
         /// <param name="key"></param>
         /// <param name="value"></param>
         /// <param name="expires"></param>
         public static void AddCookie(string cookieName, string key, string value, DateTime expires)
         {
             HttpCookie cookie = new HttpCookie(cookieName);
             cookie.Expires = expires;
             cookie.Values.Add(key, value);
             AddCookie(cookie);
         }

         /// <summary>
         /// 添加Cookie
         /// </summary>
         /// <param name="cookie"></param>
         public static void AddCookie(HttpCookie cookie)
         {
             HttpResponse response = HttpContext.Current.Response;
             if (response != null)
             {
                 //指定客户端脚本是否可以访问[默认为false]
                 cookie.HttpOnly = true;
                 //指定统一的Path，比便能通存通取
                 cookie.Path = "/";
                 //设置跨域,这样在其它二级域名下就都可以访问到了
                 //cookie.Domain = "chinesecoo.com";
                 response.AppendCookie(cookie);
             }
         }

         #endregion
     }
 }