1. 1、增加Cookie的写入方法：
    3.         /// <summary>
    4.         /// 写 Cookies
    5.         /// </summary>
    6.         /// <param name="cookieName">主键</param>
    7.         /// <param name="cookieValue">键值</param>
    8.         /// <param name="hours">有效时间（小时）</param>
    9.         /// <returns></returns>
    10.         public static bool SetCookie(string cookieName, string cookieValue, int hours)
    11.         {
    12.             try
    13.             {
    14.                 HttpCookie Cookie = new HttpCookie(cookieName);
    15.                 if (!string.IsNullOrEmpty(Settings.Domain))
    16.                     Cookie.Domain = Settings.Domain;
    17.                 Cookie.Expires = DateTime.Now.AddHours(hours);
    18.                 Cookie.Value = SecurityHelper.Encrypt(cookieValue);
    19.                 System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);
    20.                 return true;
    21.             }
    22.             catch
    23.             {
    24.                 return false;
    25.             }
    26.         }
    28. 2、增加Cookie的读取方法：
    30.          /// <summary>
    31.         /// 读取Cookies
    32.         /// </summary>
    33.         /// <param name="CookieName">主键</param>
    34.         /// <returns></returns>
    35.         public static string GetCookie(string CookieName)
    36.         {
    37.             HttpCookie Cookie = System.Web.HttpContext.Current.Request.Cookies[CookieName];
    38.             if (Cookie != null)
    39.             {
    40.                 return SecurityHelper.Decrypt(Cookie.Value.ToString());
    41.             }
    42.             else
    43.             {
    44.                 return null;
    45.             }
    46.         }
    47. 3、增加对Cookie的删除方法：
    49.         /// <summary>
    50.         /// 删除Cookies
    51.         /// </summary>
    52.         /// <param name="cookieName">主键</param>
    53.         /// <returns></returns>
    54.         public static bool DeleteCookie(string cookieName)
    55.         {
    56.             try
    57.             {
    58.                 HttpCookie Cookie = new HttpCookie(cookieName);
    59.                 if (!string.IsNullOrEmpty(Settings.Domain))
    60.                 {
    61.                     Cookie.Domain = Settings.Domain;
    62.                 }
    63.                 Cookie.Expires = DateTime.Now.AddDays(-1);
    64.                 System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);
    65.                 return true;
    66.             }
    67.             catch
    68.             {
    69.                 return false;
    70.             }
    71.         }
    72. 4、增加Cookie的过期时间设置：
    74.         /// <summary>
    75.         /// 更新cookie过期时间
    76.         /// </summary
    77.         /// <param name="cookieName"></param>
    78.         /// <param name="cookieValue"></param>
    79.         /// <param name="minutes"></param>
    80.         public static void ModCookies(string cookieName, string cookieValue, int minutes)
    81.         {
    82.             var httpCookie = HttpContext.Current.Response.Cookies[cookieName];
    83.             if (httpCookie != null)
    84.             {
    85.                 httpCookie.Value = cookieValue;
    86.                 httpCookie.Expires = DateTime.Now.AddMinutes(minutes);
    87.             }
    88.         }