public ActionResult LogOn(LogOnModel model, string returnUrl)
        {
            if (ModelState.IsValid)
            {
                string user = Membership.GetUserNameByEmail(model.UserName);
                if (user != null)
                    model.UserName = user;
                if (Membership.ValidateUser(model.UserName, model.Password)&&(Session["Captcha"]==null||Session["Captcha"].ToString()==model.Captcha))
                {

                    string pass = model.Password;
                    string nom = model.UserName;

                    Session.Remove("conteo");
                    Session.Remove("Captcha");
                    BibliotecaDataContext con = new BibliotecaDataContext();

                    var fila= from f1 in con.aspnet_Memberships join f2 in con.aspnet_Users on f1.UserId equals f2.UserId
                              where f2.UserName==nom
                              select new{
                                ID=f1.UserId
                              };

                    Session["userid"] = fila.ToArray()[0].ID;
                    ViewBag.id = (Guid)Session["userid"];
                    FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);
                    if (Url.IsLocalUrl(returnUrl) && returnUrl.Length > 1 && returnUrl.StartsWith("/")
                        && !returnUrl.StartsWith("//") && !returnUrl.StartsWith("/\\"))
                    {
                        return Redirect(returnUrl);
                    }
                    else
                    {

                        return RedirectToAction("Index", "Home");
                    }

                }
                else
                {

                    if (Session["conteo"] == null)
                        Session["conteo"] = 2;
                    else {
                        if (Session["conteo"].ToString() != "0")
                        {
                            String temp = Session["conteo"].ToString();
                            int t = Convert.ToInt16(temp) - 1;
                            Session["conteo"] = t;
                        }
                    }
                    ModelState.AddModelError("", "El usuario o password es incorrecto.");

                    if (Convert.ToInt16(Session["conteo"]) == 0)
                    {
                        ModelState.AddModelError("", "No puedes seguir intentando");
                        Session["conteo"] = 0;
                    }
                    else {
                        ModelState.AddModelError("", "Puedes intentar " + Session["conteo"] + " veces mas");
                    }
                    ViewBag.x = Session["conteo"];
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }
        public ActionResult LogOn(LogOnModel model, string returnUrl)
        {
            if (ModelState.IsValid)
            {
                string user = Membership.GetUserNameByEmail(model.UserName);
                if (user != null)
                    model.UserName = user;
                if (Membership.ValidateUser(model.UserName, model.Password)&&(Session["Captcha"]==null||Session["Captcha"].ToString()==model.Captcha))
                {
                    Session.Remove("conteo");
                    Session.Remove("Captcha");
                    FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);
                    if (Url.IsLocalUrl(returnUrl) && returnUrl.Length > 1 && returnUrl.StartsWith("/")
                        && !returnUrl.StartsWith("//") && !returnUrl.StartsWith("/\\"))
                    {
                        return Redirect(returnUrl);
                    }
                    else
                    {

                        return RedirectToAction("Index", "Home");
                    }

                }
                else
                {

                    if (Session["conteo"] == null)
                        Session["conteo"] = 2;
                    else {
                        if (Session["conteo"].ToString() != "0")
                        {
                            String temp = Session["conteo"].ToString();
                            int t = Convert.ToInt16(temp) - 1;
                            Session["conteo"] = t;
                        }
                    }
                    ModelState.AddModelError("", "El usuario o password es incorrecto.");

                    if (Convert.ToInt16(Session["conteo"]) == 0)
                    {
                        ModelState.AddModelError("", "No puedes seguir intentando");
                        Session["conteo"] = 0;
                    }
                    else {
                        ModelState.AddModelError("", "Puedes intentar " + Session["conteo"] + " veces mas");
                    }
                    ViewBag.x = Session["conteo"];
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }
        public ActionResult LogOn(LogOnModel model, string returnUrl)
        {
            if (ModelState.IsValid)
            {
                if (Membership.ValidateUser(model.UserName, model.Password))
                {
                    FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);
                    if (Url.IsLocalUrl(returnUrl) && returnUrl.Length > 1 && returnUrl.StartsWith("/")
                        && !returnUrl.StartsWith("//") && !returnUrl.StartsWith("/\\"))
                    {
                        return Redirect(returnUrl);
                    }
                    else
                    {
                        return RedirectToAction("Index", "Home");
                    }
                }
                else
                {
                    ModelState.AddModelError("", "The user name or password provided is incorrect.");
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }