private void renewBook(string id, TimeSpan ts, DateTime dueDate, string timesRenewed)
{
if (ts.Days > 0)
{
MessageBox.Show("Sorry you cannot renew the book when its due date has already passed.");
return;
}
if (int.Parse(timesRenewed) >= maxRenewTimes)
{
MessageBox.Show("Sorry you can only renew a maximum of " + maxRenewTimes + " time(s).");
return;
}
BookControl bc = new BookControl();
bc.renewBook(int.Parse(id), LoginInfo.LoggedInId, dueDate.AddDays(dueDateExtendDays));
MessageBox.Show(bc.Message);
loadData();
}