protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            List <Room> rooms = RoomDB.getRoomByOwner(Convert.ToInt32(Session["HotelID"])); //get the data from database
            if (rooms.Count != 0)                                                           //check the room data is not null
            {
                Session["room"] = rooms;                                                    //create a room session

                lblNoRoom.Visible = false;
                lvRoom.DataSource = rooms;
                lvRoom.DataBind();
            }
            else
            {
                lblNoRoom.Visible = true;
            }
            //to disable past dates
            tbxCheckIn.Attributes["min"]  = DateTime.Now.ToString("yyyy-MM-dd");
            tbxCheckOut.Attributes["min"] = DateTime.Now.ToString("yyyy-MM-dd");
        }
    }