public IActionResult Index()
        {
            GuestBookDataContext db = new GuestBookDataContext();
            var items = db.GuestBooks.ToList();

            return(View(items));
        }
        public IActionResult Create(GuestBook item)
        {
            if (ModelState.IsValid)
            {
                GuestBookDataContext db = new GuestBookDataContext();
                db.Add(item);
                db.SaveChanges();

                return(RedirectToAction("Index"));
            }
            return(View());
        }
        private void buttonInsertData_Click(object sender, EventArgs e)
        {
            var name    = textBoxName.Text;
            var email   = textBoxEmail.Text;
            var message = textBoxMessage.Text;

            try
            {
                var db   = new GuestBookDataContext();
                var item = new GuestBook {
                    Name = name, Email = email, Message = message
                };
                db.GuestBook.Add(item);
                db.SaveChanges();

                MessageBox.Show("Data berhasil disimpan.");
            }
            catch (Exception ex)
            {
                MessageBox.Show("Data gagal disimpan. \n" + ex.ToString());
            }
        }
 public HomeController(GuestBookDataContext context)
 {
     db = context;
 }