private void LoadTijdAdd()
        {
            FilmDate.MinDate = DateTime.Now;
            var Function = new Functions();

            DataRowCollection film = Functions.Select("SELECT naam,id FROM Films");

            foreach (DataRow row in film)
            {
                CustomComboBox item = new CustomComboBox();
                item.Text  = row["naam"].ToString();
                item.Value = Int32.Parse(row["id"].ToString());
                MovieAdd.Items.Add(item);
            }

            DataRowCollection zaal = Functions.Select("SELECT naam,id FROM zalen");

            foreach (DataRow row in zaal)
            {
                CustomComboBox item = new CustomComboBox();
                item.Text  = row["naam"].ToString();
                item.Value = Int32.Parse(row["id"].ToString());
                ZaalAdd.Items.Add(item);
            }
        }
        public void LoadAdd(int film_id)
        {
            var Function           = new Functions();
            DataRowCollection data = Functions.Select("SELECT * FROM Genres");

            foreach (DataRow row in data)
            {
                CustomComboBox item = new CustomComboBox();
                item.Text  = row["naam"].ToString();
                item.Value = Int32.Parse(row["id"].ToString());
                FilmGenre.Items.Add(item);
            }

            FilmAge.Items.Add("0");
            FilmAge.Items.Add("6");
            FilmAge.Items.Add("9");
            FilmAge.Items.Add("12");
            FilmAge.Items.Add("16");
            FilmAge.Items.Add("18");

            if (film_id > 0)
            {
                DataRowCollection film = Functions.Select("SELECT g.naam as GenreNaam, f.naam as FilmNaam, * FROM films f LEFT JOIN Genres g ON f.genre = g.id WHERE f.id= '" + film_id + "'");

                FilmNaam.Text           = film[0]["FilmNaam"].ToString();
                FilmAge.Text            = film[0]["leeftijd"].ToString();
                FilmTime.Text           = film[0]["speel_duur"].ToString();
                FilmTrailer.Text        = film[0]["youtube_code"].ToString();
                FilmDisc.Text           = film[0]["beschrijving"].ToString();
                FilmGenre.Text          = film[0]["GenreNaam"].ToString();
                FilmGenre.SelectedIndex = FilmGenre.FindStringExact(film[0]["GenreNaam"].ToString());
                FilmAge.SelectedIndex   = FilmAge.FindStringExact(film[0]["leeftijd"].ToString());
                FilmAddButton.Text      = "Aanpassen";
            }
        }