private void button1_Click(object sender, EventArgs e)
        {
            KinoClass cla = new KinoClass();

            if (check != true)
            {
                bool turn;
                turn = cla.query_command("insert into Seans(film_id,sala_id,data_czas,czas_reklamy) values ('" + comboBox1.SelectedValue + "','" + comboBox2.SelectedValue + "','" + dateTimePicker1.Value.ToString("yyyy-MM-dd HH:mm") + "','" + numericUpDown1.Value + "')");
                if (turn)
                {
                    MessageBox.Show("The Performance Has Been Successfully Added", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
            else
            {
                bool turn;
                turn = cla.query_command("Update Seans SET film_id ='" + comboBox1.SelectedValue + "', sala_id='" + comboBox2.SelectedValue + "', data_czas= '" + dateTimePicker1.Value.ToString("yyyy-MM-dd HH:mm") + "', czas_reklamy='" + numericUpDown1.Value + "' where seans_id=" + get_number_seans + ";");
                if (turn)
                {
                    MessageBox.Show("The Performance Has Been Successfully Updated", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
            DialogResult = DialogResult.OK;
            ListaSeansów listaSeansów = new ListaSeansów();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            KinoClass cla = new KinoClass();
            DataTable tab = cla.table_get_data("DELETE from Seans where seans_id =" + get_number_seans + ";");

            MessageBox.Show("The Performance Has Been Successfully DELETED", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
            DialogResult = DialogResult.OK;
            ListaSeansów listaSeansów = new ListaSeansów();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            ListaSeansów listaSeansów = new ListaSeansów();

            if (listaSeansów.ShowDialog() != DialogResult.OK)
            {
                return;
            }
            string nazwa;
        }