Cookie帮助类

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.IO;

using System.Runtime.Serialization;

using System.Runtime.Serialization.Formatters.Binary;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Data;

using System.Configuration;

namespace Bll

{

    /// <summary> 

    /// Cookie操作类 

    /// </summary> 

    public class CookieHelper

    {

        #region 保存Cookie

        /// <summary> 

        /// 保存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, object CookieValue, double CookieTime)

        {

            HttpCookie myCookie = new HttpCookie(CookieName);

            DateTime now = DateTime.Now;

            myCookie.Value = ConvertObjectToString(CookieValue);

            if (CookieTime != 0)

                myCookie.Expires = now.AddHours(CookieTime);

            if (HttpContext.Current.Response.Cookies[CookieName] != null)

                HttpContext.Current.Response.Cookies.Remove(CookieName);

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

        }

        private static string ConvertObjectToString(object CookieValue)

        {

            BinaryFormatter bf = new BinaryFormatter();

            MemoryStream ms = new MemoryStream();

            bf.Serialize(ms, CookieValue);

            byte[] result = new byte[ms.Length];

            result = ms.ToArray();

            string temp = System.Convert.ToBase64String(result);

            ms.Flush();

            ms.Close();

            return temp;

        }

        #endregion

        #region 取得Cookie

        /// <summary> 

        /// 取得Cookie 

        /// </summary> 

        /// <param name="CookieName">Cookie名称</param> 

        /// <returns>Cookie的值</returns> 

        public static object GetCookie(string CookieName)

        {

            HttpCookie myCookie = new HttpCookie(CookieName);

            myCookie = HttpContext.Current.Request.Cookies[CookieName];

            if (myCookie != null)

                return ConvertStringToObject(myCookie.Value);

            else

                return null;

        }

        private static object ConvertStringToObject(string value)

        {

            byte[] b = System.Convert.FromBase64String(value);

            MemoryStream ms = new MemoryStream(b, 0, b.Length);

            BinaryFormatter bf = new BinaryFormatter();

            return bf.Deserialize(ms);

        }

        #endregion

        #region 清除Cookie

        /// <summary> 

        /// 清除Cookie

        /// </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);

        }

        #endregion

    }

}