public int DeleteOldMovies()//checked
{
DataTable dt = Movies.OldMoviesList();
DataTable dt2 = Screening.ScreeningsOfOldMoviesTable();
for (int i = 0; i < dt2.Rows.Count; i++)
{
int screening = int.Parse(dt2.Rows[i]["ScreeningID"].ToString());
DataTable dtchange = Invitation.InvitationsToDeleteTable(screening);
for (int j = 0; j < dtchange.Rows.Count; j++)
{
int invitation = int.Parse(dtchange.Rows[j]["InvitationID"].ToString());
Invitation.DeleteInvitation(invitation);
}
}
Screening.DeleteOldScreenings();
int k = Movies.DeleteOldMovies();
return(k);
}