private void SaveData(IShoppingListsDAO shoppingListsDAO, IProductsDAO productsDAO)
{
productsDAO.DeleteAll();
shoppingListsDAO.DeleteAll();
foreach (var sl in ShoppingLists)
{
if (sl.Id == null)
{
sl.Id = NewListId();
}
shoppingListsDAO.Save(sl);
foreach (var p in sl.Items)
{
p.ShoppingListId = sl.Id;
if (p.Id == null)
{
p.Id = NewProductId();
}
productsDAO.Save(p);
}
}
}
