public void addStoreVisibleDiscount(int store, double percentage, string duration, int session)
{
if (store < 0)
{
throw new ILLArgumentException("illegal store number");
}
if (percentage <= 0 || percentage >= 1)
{
throw new IllegalAmountException("percentage of discount must be a number between 0 to 1");
}
if (session < 0)
{
throw new NullReferenceException("session is a null reference");
}
db.addStoreVisibleDiscount(store, percentage, duration, session);
}
