using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Web;namespace Common{    public class CookieHelper    {        /// <summary>        /// 保存一个Cookie        /// </summary>        /// <param name="CookieName">Cookie名称</param>        /// <param name="CookieValue">Cookie值</param>        /// <param name="CookieTime">Cookie过期时间(小时),0为关闭页面失效</param>        public static void SaveCookie(string CookieName, string CookieValue, double CookieTime)        {            HttpCookie myCookie = new HttpCookie(CookieName);            DateTime now = DateTime.Now;            myCookie.Value = CookieValue;            if (CookieTime != 0)            {                myCookie.Expires = now.AddDays(CookieTime);                if (HttpContext.Current.Response.Cookies[CookieName] != null)                    HttpContext.Current.Response.Cookies.Remove(CookieName);                HttpContext.Current.Response.Cookies.Add(myCookie);            }            else            {                if (HttpContext.Current.Response.Cookies[CookieName] != null)                    HttpContext.Current.Response.Cookies.Remove(CookieName);                HttpContext.Current.Response.Cookies.Add(myCookie);            }        }        /// <summary>        /// 取得CookieValue        /// </summary>        /// <param name="CookieName">Cookie名称</param>        /// <returns>Cookie的值</returns>        public static string GetCookie(string CookieName)        {            HttpCookie myCookie = new HttpCookie(CookieName);            myCookie = HttpContext.Current.Request.Cookies[CookieName];            if (myCookie != null)                return myCookie.Value;            else                return null;        }        /// <summary>        /// 清除CookieValue        /// </summary>        /// <param name="CookieName">Cookie名称</param>        public static void ClearCookie(string CookieName)        {            HttpCookie myCookie = new HttpCookie(CookieName);            DateTime now = DateTime.Now;            myCookie.Expires = now.AddYears(-2);            HttpContext.Current.Response.Cookies.Add(myCookie);        }        #region 清除Cookie        /// <summary>        /// 清除Cookie        /// </summary>        /// <param name="cookieName"></param>        public static void ClearCookie(string cookieName, string domain, string path)        {            cookieName = Encode(cookieName);            HttpCookie cookie = new HttpCookie(cookieName);            cookie.Domain = domain;            cookie.Path = path;            cookie.Expires = DateTime.Now.AddDays(-360);            System.Web.HttpContext.Current.Response.Cookies.Add(cookie);        }        /// <summary>        /// 从多值Cookie移除个subKey        /// </summary>        /// <param name="cookieName"></param>        /// <param name="subKey"></param>        public static void ClearCookie(string cookieName, string subKey, string domain, string path)        {            cookieName = Encode(cookieName);            subKey = Encode(subKey);            HttpCookie cookie;            if (System.Web.HttpContext.Current.Request.Cookies[cookieName] == null)            {                cookie = new HttpCookie(cookieName);            }            else            {                cookie = System.Web.HttpContext.Current.Request.Cookies[cookieName];            }            cookie.Domain = domain;            cookie.Path = path;            cookie.Values.Remove(subKey);            System.Web.HttpContext.Current.Response.Cookies.Add(cookie);        }        public static string Encode(string input)        {            if (string.IsNullOrEmpty(input))            {                return null;            }            // return AntiXssEncoderTwo.UrlEncode(input);            return HttpUtility.UrlEncode(input);//.Replace("_", "%5F").Replace("&", "%26").Replace("+", "%2B");        }        public static string Decode(string input)        {            return HttpUtility.UrlDecode(input);        }        #endregion       }}