Session对象处理

 public class ObjSession
    {
        /// <summary>
        /// 创建一个Session对象
        /// </summary>
        /// <param name="Key">键名</param>
        /// <param name="Value">键值</param>
        /// <param name="Time">保存时间(分钟为单位)</param>
        /// <returns></returns>
        public static bool Add(string Key, string Value, int Time)
        {
            try
            {
                HttpContext.Current.Session[Key] = Value;
                HttpContext.Current.Session.Timeout = Time;
                return true;
            }
            catch
            {
                return false;
            }
        }
        /// <summary>
        /// 获取一个Session对象
        /// </summary>
        /// <param name="Key">键名</param>
        /// <returns></returns>
        public static object Value(string Key)
        {
            return HttpContext.Current.Session[Key];
        }
        /// <summary>
        /// 判断一个Session对象是否存在
        /// </summary>
        /// <param name="Key">键名</param>
        /// <returns></returns>
        public static bool Exis(string Key)
        {
            try
            {
                if (HttpContext.Current.Session[Key] != null & HttpContext.Current.Session[Key].ToString() != "")
                {
                    return true;
                }
                return false;
            }
            catch
            {
                return false;
            }
        }
        /// <summary>
        /// 删除一个Session对象
        /// </summary>
        /// <param name="Key">键名</param>
        public static void Remove(string Key)
        {
            try
            {
                HttpContext.Current.Session.Remove(Key);
            }
            catch
            { }
        }
    }