自定义Session类实现

　　 public class CustomizeSession
    {
        private HttpSessionState _sesssion = HttpContext.Current.Session;
        public void SetSession(string key,string value)
        {
            _sesssion[key] = value;
            //string id = _sesssion.SessionID;
        }
        public int GetSessionNumber(string key)
        {
            int result = 0;
            if (_sesssion[key]!=null)
            {
                int.TryParse(_sesssion[key].ToString(),out result);
            }
            return result;
        }

        public string GetSessionString(string key)
        {
            string result = "";
            if (_sesssion[key]!=null)
            {
                result = _sesssion[key].ToString();
            }
            return result;
        }

        public void SetTimeOut(int timeout)
        {
            _sesssion.Timeout = timeout;//min
        }
        public void Clear()
        {
            _sesssion.Clear();
        }
    }