写入Cookie

            if (bll.UserLogin(loginUser, loginPwd, out msg, out userModel))
            {
                Session["currUser"] = userModel;
                if (cbAutoLogin.Checked)
                {
                    HttpCookie c1 = new HttpCookie("cp1", userModel.LoginId);
                    HttpCookie c2 = new HttpCookie("cp2", this.JiaMi(userModel.LoginPwd));
                    c1.Expires = DateTime.Now.AddDays(7);
                    c2.Expires = DateTime.Now.AddDays(7);

                    Response.Cookies.Add(c1);
                    Response.Cookies.Add(c2);

                }
                GoPage();
            }


读取Cookie
  protected void Page_Load(object sender, EventArgs e)
        {
            if (Request.Cookies["cp1"] != null && Request.Cookies["cp2"] != null)
            {
                string a = Request.Cookies["c1"].Value;
                string b = Request.Cookies["c2"].Value;
                UsersModel model = bll.GetMode(a);
                if (model!=null && model.UserState.Name=="正常")
                {
                    string result = this.JiaMi(model.LoginPwd, b.Substring(0, 2));
                    if (result==b)
                    {
                        Session["currUser"] = model;
                        GoPage();
                    }
                }

            }

        }