asp.net操作cookie类，包含datatable批量存入cookie

   public class CookieMgr {

        #region 快速储存Cookie

        /// <summary>

        /// 快速储存Cookie

        /// </summary>

        /// <param name="dt">数据源表</param>

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

        /// <param name="day">过期时间，天</param>

        public static void SaveCookie(DataTable dt, string cookieName, int day) {

            HttpCookie cookie = new HttpCookie(cookieName);

            if (day != )

                cookie.Expires = DateTime.Now.AddDays(day);

            for (int i = ; i < dt.Columns.Count; i++) {

                cookie.Values.Add(dt.Columns[i].ColumnName, StringMgr.Encrypt(dt.Rows[][dt.Columns[i].ColumnName].ToString())); //加密

            }

            HttpContext.Current.Response.AppendCookie(cookie);

        }

        #endregion

        #region 初始化一个Cookie

        /// <summary>

        /// 初始化一个Cookie

        /// </summary>

        /// <param name="cookieName">cookie名称</param>

        /// <param name="day">过期时间，天</param>

        public static void InitCookie(string cookieName, int day) {

            HttpCookie cookie = new HttpCookie(cookieName);

            if (day != )

                cookie.Expires = DateTime.Now.AddDays(day);

            cookie.Values.Add("initExpires", StringMgr.Encrypt(day.ToString()));

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

        }

        #endregion

        #region 设置Cookie的其中一个值,如果键存在则覆盖以前的键值

        /// <summary>

        /// 附加一个Cookie的值,如果键值存在则覆盖以前的键值

        /// </summary>

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

        /// <param name="key">需附加的键</param>

        /// <param name="value">需附加的值</param>

        public static void SetCookie(string cookieName, string key, string value) {

            HttpCookie cookie = null;

            if (HttpContext.Current.Request.Cookies[cookieName] != null) {

                cookie = HttpContext.Current.Request.Cookies[cookieName];

            } else

                cookie = new HttpCookie(cookieName);

            bool b = false;

            for (int i = ; i < cookie.Values.Keys.Count; i++) {

                if (cookie.Values.Keys[i] == key) {

                    b = true;

                    break;

                }

            }

            value = StringMgr.Encrypt(value);

            if (b)

                cookie.Values[key] = value;

            else

                cookie.Values.Add(key, value);

            for (int i = ; i < cookie.Values.Keys.Count; i++) {

                if (cookie.Values.Keys[i] == "initExpires") {

                    cookie.Expires = DateTime.Now.AddDays(int.Parse(StringMgr.Decrypt(cookie.Values["initExpires"].ToString())));

                    break;

                }

            }

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

        }

        #endregion

        #region 读取Cookie的其中一个值

        /// <summary>

        /// 读取Cookie的其中一个值

        /// </summary>

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

        /// <param name="key">需读取的键</param>

        /// <returns>返回名为【CookieName】键为【key】的值</returns>

        public static string GetCookie(string cookieName, string key) {

            HttpCookie cookie = HttpContext.Current.Request.Cookies[cookieName];

            if (cookie != null && cookie.Values[key] != null)

                return StringMgr.Decrypt(cookie.Values[key].ToString());

            else

                return Param.CookieErrorString;

        }

        #endregion

        #region 移除Cookie的其中一个值

        /// <summary>

        /// 移除Cookie的其中一个值

        /// </summary>

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

        /// <param name="key">需附加的键</param>

        public static void RemoveCookie(string cookieName, string key) {

            HttpCookie cookie = null;

            if (HttpContext.Current.Request.Cookies[cookieName] != null)

                cookie = HttpContext.Current.Request.Cookies[cookieName];

            else

                cookie = new HttpCookie(cookieName);

            bool b = false;

            for (int i = ; i < cookie.Values.Keys.Count; i++) {

                if (cookie.Values.Keys[i] == key) {

                    b = true;

                    break;

                }

            }

            if (b)

                cookie.Values.Remove(key);

            for (int i = ; i < cookie.Values.Keys.Count; i++) {

                if (cookie.Values.Keys[i] == "initExpires") {

                    cookie.Expires = DateTime.Now.AddDays(int.Parse(StringMgr.Decrypt(cookie.Values["initExpires"].ToString())));

                    break;

                }

            }

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

        }

        #endregion

        #region 清空Cookie

        /// <summary>

        /// 清空Cookie

        /// </summary>

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

        public static void ClearCookie(string cookieName) {

            System.Web.HttpCookie cookie = new System.Web.HttpCookie(cookieName);

            cookie.Expires = System.DateTime.Now.AddYears(-);

            System.Web.HttpContext.Current.Response.AppendCookie(cookie);

        }

        #endregion

        #region 得到Cookie的集合

        /// <summary>

        /// 得到Cookie的集合

        /// </summary>

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

        /// <returns>返回Cookie的集合</returns>

        public static NameValueCollection GetCookieValues(string cookieName) {

            if (HttpContext.Current.Request.Cookies[cookieName] != null) {

                HttpCookie cookie = HttpContext.Current.Request.Cookies[cookieName];

                return cookie.Values;

            } else

                return null;

        }

        #endregion

    }