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

以下是类：

   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 != 0)
                cookie.Expires = DateTime.Now.AddDays(day);

            for (int i = 0; i < dt.Columns.Count; i++) {
                cookie.Values.Add(dt.Columns[i].ColumnName, StringMgr.Encrypt(dt.Rows[0][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 != 0)
                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 = 0; 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 = 0; 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 = 0; i < cookie.Values.Keys.Count; i++) {
                if (cookie.Values.Keys[i] == key) {
                    b = true;
                    break;
                }
            }
            if (b)
                cookie.Values.Remove(key);

            for (int i = 0; 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(-1);
            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
    }

保存DT到cookie

ookieMgr.SaveCookie(dt, "名称", 0);

获取cookie key值

CookieMgr.GetCookie("名称", "姓名");