<authentication mode="Forms"></authentication>

        //获取认证信息public ActionResult Index(){if (Request.IsAuthenticated){//获取认证信息//Request.Cookies[FormsAuthentication.FormsCookieName] != null//Request.IsAuthenticatedstring user = User.Identity.Name;//Request.RequestContext.HttpContext.User.Identity.Namevar cookie = Request.Cookies[FormsAuthentication.FormsCookieName];var ticket = FormsAuthentication.Decrypt(cookie.Value);string data = ticket.UserData;return Content($"用户已登录 <br> user：{user} <br> data：{data}");}return Content("用户未登录");}

        //登录1public ActionResult Login1(){FormsAuthentication.SetAuthCookie("name2", true);return Content("登录成功，name: name2");}//登录2public ActionResult Login2(){/*判断是否登录的唯一标志，就是 看看 有没有名称为FormsAuthentication.FormsCookieName的cookie，有就是登录了。按照asp.net forms验证的设计思想，如果要将自定义数据放到Cookie里面，首先应该定制一个FormsAuthenticationTicket，将自定义数据放到其UserData里，然后用FormsAuthentication.Encrypt加密这个Ticket，最后用new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket)生成一个Cookie，加入到Response.Cookies中， 作为登录标注。并不是直接修改 HttpCookie的Value或者Values。                 *///创建认证信息 TicketFormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1, "name1", DateTime.Now, DateTime.Now.AddSeconds(5), false, "value1");//票据加密string encryptedTicket = FormsAuthentication.Encrypt(ticket);//写入到cookievar cookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket);System.Web.HttpContext.Current.Response.SetCookie(cookie);return Content($"cookie <br> name:{cookie.Name} <br> value:{cookie.Value}");}

        //退出public ActionResult Logout(){FormsAuthentication.SignOut();return Content("退出成功");}