客户端保存用户登陆信息

Code
using System;
using System.Collections.Generic;
using System.Text;
using Model;
using System.Web;
using IDAL;

namespace Common
{
    
    public class Member
    {
        /// <summary>
        /// lgoin_User
        /// </summary>
        private const string USER_LOGIN = "lgoin_User";

        /// <summary>
        /// 用户登陆，保存登陆信息
        /// </summary>
        /// <param name="admin"></param>
        public static void SaveLoginUserInfo(string userName)
        {
            try
            {
                if (string.IsNullOrEmpty(userName)) return;

                Admin admin = Factory.Factory.GetAdminIDAL().GetAdminByUserName(userName);
                HttpContext.Current.Session.Add(USER_LOGIN, admin);
                SetCookies(USER_LOGIN, admin.UserName);
            }
            catch
            {
                throw new Exception("登录信息保存失败！");
            }
        }


        /// <summary>
        /// 用户注销，清空登陆信息
        /// </summary>
        public static void SingOut()
        {
            if (HttpContext.Current.Session[USER_LOGIN] != null)
                HttpContext.Current.Session.Remove(USER_LOGIN);
            DeleteCookie(USER_LOGIN);
        }

        /// <summary>
        /// 是否已登录
        /// </summary>
        public static bool IsLogon
        {
            get
            {
                return User != null;
            }
        }

        
        /// <summary>
        /// 登录用户id
        /// </summary>
        public static int UserId
        {
            get
            {
                if (User != null)
                    return User.Id;
                return -1;
            }

        }

        /// <summary>
        /// 登录用户账号
        /// </summary>
        public static string UserName
        {
            get
            {
                if (User != null)
                    return User.UserName;
                return "";
            }
        }

        /// <summary>
        /// 登录用户类型
        /// </summary>
        public static int UserType
        {
            get
            {
                if (User != null)
                    return User.Level;
                return 0;
            }
        }

        /// <summary>
        /// 登录用户基本信息
        /// </summary>
        private static Admin User
        {
            get
            {
                if (HttpContext.Current.Session[USER_LOGIN] != null)
                    return (Admin)HttpContext.Current.Session[USER_LOGIN];

                if (CookiesIsEx(USER_LOGIN))
                {
                    string username = (string)GetValueFromCookies(USER_LOGIN);
                    IDAL.IAdminDAL iadmin = Factory.Factory.GetAdminIDAL();
                    return iadmin.GetAdminByUserName(username);
                }
                return null;
            }
        }

        /// <summary>
        /// 添加cookie
        /// </summary>
        /// <param name="cookisName">cookie名称</param>
        /// <param name="value">值</param>
        private static void SetCookies(string cookisName, string value)
        {
            HttpCookie cookie = System.Web.HttpContext.Current.Request.Cookies[cookisName];
            Common.Encrypt(value);

            if (cookie == null)
                cookie = new HttpCookie(cookisName);
            cookie.Path = "/";
            cookie.Expires = DateTime.Now.AddMinutes(20);
            cookie.Value = value;
            HttpContext.Current.Response.AppendCookie(cookie);
        }

        /// <summary>
        /// 删除cookis
        /// </summary>
        /// <param name="cookisName">cookis名称</param>
        private static void DeleteCookie(string cookisName)
        {
            HttpCookie cookie = new HttpCookie(cookisName);
            cookie.Path =  "/";
            cookie.Expires = DateTime.Now.AddDays(-1);
            System.Web.HttpContext.Current.Response.Cookies.Add(cookie);
        }

        /// <summary>
        /// 根据cookie名称获取值
        /// </summary>
        /// <param name="cookisName"></param>
        /// <returns></returns>
        private static object GetValueFromCookies(string cookisName)
        {
            return System.Web.HttpContext.Current.Request.Cookies[cookisName].Value;
        }

        /// <summary>
        /// 是否存在Cookies
        /// </summary>
        /// <param name="cookisName"></param>
        /// <returns></returns>
        private static bool CookiesIsEx(string cookisName)
        {
            if (System.Web.HttpContext.Current.Request.Cookies[cookisName] == null)
                return false;
            return !(string.IsNullOrEmpty(System.Web.HttpContext.Current.Request.Cookies[cookisName].Value));
        }

    }
}