public ActionResult Login(string username, string password)
 {
     if (LaboratoryDAL.ValidateUser(username, password))
     {
         TempData["username"] = username;
         return(RedirectToAction("Index"));
     }
     else
     {
         ModelState.AddModelError("", "Invalid Username OR Password");
         return(View());
     }
 }
        public ActionResult Create_Post()
        {    // Retrieve form data using form collection
            Laboratory laboratory = new Laboratory();

            TryUpdateModel(laboratory);
            if (ModelState.IsValid)
            {
                if (LaboratoryDAL.Insert(laboratory))
                {
                    return(RedirectToAction("Login"));
                }
                else
                {
                    ModelState.AddModelError("", "Username already exists");
                    return(View());
                }
            }
            else
            {
                return(View());
            }
        }