private void delete_movie_info_Click(object sender, EventArgs e) { Rental_Field instance = new Rental_Field(); if (Rental_Id.Equals("")) { MessageBox.Show("Select Rental Movie To delete"); } else { if (instance.Rental_Delete(Convert.ToInt32(Rental_Id)) == 1) { videorental_ID.Text = ""; rentalInfo_csID.Text = ""; } } }