public ActionResult DeleteConfirmed(int id, int stId, int classId)
        {
            register_student register_student = db.register_student.Find(id, stId, classId);

            db.register_student.Remove(register_student);
            db.SaveChanges();
            return(RedirectToAction("Index"));
        }
 public ActionResult Edit([Bind(Include = "register_id,student_id,class_id")] register_student register_student)
 {
     if (ModelState.IsValid)
     {
         db.Entry(register_student).State = EntityState.Modified;
         db.SaveChanges();
         return(RedirectToAction("Index"));
     }
     ViewBag.class_id   = new SelectList(db.student_class, "class_id", "getDetails", register_student.class_id);
     ViewBag.student_id = new SelectList(db.students, "student_id", "email_id", register_student.student_id);
     return(View(register_student));
 }
        // GET: register_student/Details/5
        public ActionResult Details(int?id, int?stId, int?classId)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            register_student register_student = db.register_student.Find(id, stId, classId);

            if (register_student == null)
            {
                return(HttpNotFound());
            }
            return(View(register_student));
        }
        // GET: register_student/Edit/5
        public ActionResult Edit(int?id, int?stId, int?classId)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            register_student register_student = db.register_student.Find(id, stId, classId);

            if (register_student == null)
            {
                return(HttpNotFound());
            }
            ViewBag.class_id   = new SelectList(db.student_class, "class_id", "getDetails", register_student.class_id);
            ViewBag.student_id = new SelectList(db.students, "student_id", "email_id", register_student.student_id);
            return(View(register_student));
        }