public ActionResult Login(string returnUrl) { var model = new LoginViewModel(); MvcCaptcha loginCaptCha = new MvcCaptcha("LoginCaptCha"); loginCaptCha.Reset(); loginCaptCha.UserInputID = "CaptchaCode"; loginCaptCha.AutoClearInput = true; loginCaptCha.AutoUppercaseInput = true; model.LoginCaptCha = loginCaptCha; ViewBag.ReturnUrl = returnUrl; return(View(model)); }