public ActionResult DeleteConfirmed(string id)
 {
     Tbl_NamHoc tbl_NamHoc = db.Tbl_NamHoc.Find(id);
     db.Tbl_NamHoc.Remove(tbl_NamHoc);
     db.SaveChanges();
     return RedirectToAction("Index");
 }
 public ActionResult Edit([Bind(Include = "maNamHoc,tenNamHoc,tienThang")] Tbl_NamHoc tbl_NamHoc)
 {
     if (ModelState.IsValid)
     {
         db.Entry(tbl_NamHoc).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(tbl_NamHoc);
 }
        public ActionResult Create([Bind(Include = "maNamHoc,tenNamHoc,tienThang")] Tbl_NamHoc tbl_NamHoc)
        {
            if (ModelState.IsValid)
            {
                db.Tbl_NamHoc.Add(tbl_NamHoc);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(tbl_NamHoc);
        }
 // GET: NamHoc/Delete/5
 public ActionResult Delete(string id)
 {
     if (id == null)
     {
         return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
     }
     Tbl_NamHoc tbl_NamHoc = db.Tbl_NamHoc.Find(id);
     if (tbl_NamHoc == null)
     {
         return HttpNotFound();
     }
     return View(tbl_NamHoc);
 }