public async Task <IActionResult> Edit(string id, [Bind("room_id,room_name,capacity")] Room room)
        {
            if (id != room.room_id)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(room);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!RoomExists(room.room_id))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(room));
        }
        public async Task <IActionResult> Edit(string id, [Bind("booking_id,booking_title,start_time,end_time,participants,note,room_id,users_id")] Booking booking)
        {
            if (id != booking.booking_id)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(booking);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!BookingExists(booking.booking_id))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            ViewData["room_id"] = new SelectList(_context.Set <Room>(), "room_id", "room_name", booking.room_id);
            return(View(booking));
        }
        public async Task <IActionResult> Edit(string id, [Bind("User_id,User_name")] User_s user_s)
        {
            if (id != user_s.User_id)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(user_s);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!User_sExists(user_s.User_id))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(user_s));
        }