我写的PageBase类，用于用户登录限制

 

 

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using DAL;

namespace WebUI
{
    public class PageBase : System.Web.UI.Page
    {
        private User currentUser;
        private static readonly string LoginUrl = ConfigurationManager.AppSettings["LoginUrl"];

        //重写基类Page用于登陆
        protected override void OnPreInit(EventArgs e)
        {
            base.OnPreInit(e);
            HttpCookie oldCookie = CheckCookie();
            if (oldCookie == null)
            {
                Response.Redirect(LoginUrl);
            }
            else
            {
                currentUser = new User();
                currentUser.UID = int.Parse(oldCookie.Values["UID"]);
                currentUser.UserName = oldCookie.Values["UserName"];
                //currentUser.NickName = oldCookie.Values["NickName"];
                //currentUser.TrueName = oldCookie.Values["TrueName"];
                reCookies();
            }

        }

        //重写COOKIES
        public void reCookies()
        {
            if (CheckCookie() != null)
            {
                HttpCookie oldCookie = HttpContext.Current.Request.Cookies["User"];
                oldCookie.Expires = DateTime.Now.AddMinutes(10);
                HttpContext.Current.Response.AppendCookie(oldCookie);
            }
        }

        //判断cookie是否存在，并获取Cookie
        public HttpCookie CheckCookie()
        {
            if (HttpContext.Current.Request.Cookies["User"] != null)
            {
                return HttpContext.Current.Request.Cookies["User"];
            }
            return null;
        }

        public User CurrentUser
        {
            get
            {
                return currentUser;
            }
        }
    }

    
}

 

 继承该类，控制用户是否登陆。