================== 写过无数次的代码，自信心受到很大的打击。。。有关Request.IsAuthenticated =============
已经将代码放到这里.

https://skydrive.live.com/redir?resid=4D9CD22D50108C94!165

很简单的登录功能。环境visual studio 2012 ,4.5 framework,iis express

public static class Users

    {

        private static readonly List<Tuple<string, string, string>> vals;



        static Users()

        {

            vals = new List<Tuple<string, string, string>>();

            vals.Add(new Tuple<string, string, string>("userName", "pwd", "group1"));

           

        }



        public static Tuple<string, string, string> Login(string userName, string pwd)

        {

            return vals.FirstOrDefault(x => x.Item1 == userName && x.Item2 == pwd);

        }



    }

login.aspx登录页

protected void btnOk_Click(object sender, EventArgs e)

        {

            var result = Users.Login(userName.Text,pwd.Text);

            if (result != null)

            {

                string userDataString = result.Item3;

                HttpCookie authCookie = FormsAuthentication.GetAuthCookie(userName.Text, RememberMe.Checked);

                FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(authCookie.Value);

                FormsAuthenticationTicket newTicket = new FormsAuthenticationTicket(ticket.Version, ticket.Name, ticket.IssueDate, ticket.Expiration, ticket.IsPersistent, userDataString);

                authCookie.Value = FormsAuthentication.Encrypt(newTicket);

                Response.Cookies.Add(authCookie);

                string redirUrl = FormsAuthentication.GetRedirectUrl(userName.Text, RememberMe.Checked);

                Response.Redirect(redirUrl);

            }

            else

     &n