public BookCategory Update(BookCategory t) { BookCategory f = Get(t.Id); if (f == null) { throw new ArgumentNullException($"BookCategory Item with id {t.Id} does not exist or its deleted"); } bookCategory.Remove(t); if (!IsDuplicate(t)) { if (t.Id <= 0) { throw new ArgumentException("Invalid BookCategory Item Id"); } f.CategoryName = t.CategoryName; f.Quantity = t.Quantity; f = DbStore.Save <BookCategory>(f); return(f); } else { bookCategory.Add(f); throw new DuplicateItemException("BookCategory Item already exists"); } }
public void Delete(long id) { BookCategory r = Get(id); DbStore.Delete <BookCategory>(r); bookCategory.Remove(r); }
public BookCategory Add(BookCategory t) { if (!IsDuplicate(t)) { t.Id = 0; var ret = DbStore.Save <BookCategory>(t); if (ret != null) { bookCategory.Add(ret); } return(ret); } else { throw new DuplicateItemException("Book Category already exists"); } }
bool IsDuplicate(BookCategory r) { return(bookCategory.Exists(d => (d.CategoryName == r.CategoryName && d.Quantity == r.Quantity))); }