public ActionResult Login(LoginViewModel model) { ConnectDatabase conn = null; if (!ModelState.IsValid) { return(View("Index", model)); } else { conn = new ConnectDatabase(model.ServerName, model.UserId, model.Password); var connectResult = conn.Connect(); if (connectResult) { Session[Keys.session_Login] = model; return(Redirect("/home/index")); } else { ViewBag.error = "Đăng nhập không thành công!"; return(View("Index", model)); } } }