public ActionResult Registration(Register model)
 {
     using (var db = new Lab9Context())
     {
         var s = db.Registers.Where(x => x.UserName == model.UserName).FirstOrDefault();
         if (s == null)
         {
             db.Registers.Add(model);
             db.SaveChanges();
             return(RedirectToAction("Calculation", model));
         }
     };
     return(RedirectToAction("Index", "Home"));
 }
        public ActionResult Logout(string Username)
        {
            using (var db = new Lab9Context())
            {
                var s = db.Logins.Where(x => x.UserName == Username).FirstOrDefault();
                if (s != null)
                {
                    db.Logins.Remove(s);
                    db.SaveChanges();

                    return(RedirectToAction("Index", "Home"));
                }
            };
            return(RedirectToAction("Index", "Home"));
        }
        public ActionResult LoginUser(Login model)
        {
            using (var db = new Lab9Context())
            {
                var s = db.Registers.Where(x => x.UserName == model.UserName).FirstOrDefault();
                if (s != null)
                {
                    if (s.Password == model.Password)
                    {
                        db.Logins.Add(model);
                        db.SaveChanges();
                        //return Redirect(Url.Action("Calculation","Home", new { id = model.UserName }));

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