private void btnAddItem_Click(object sender, EventArgs e)
        {
            tempItem.catalogId = this.catalogId;
            tempItem.productId = this.itemId;
            BusinessLogic.Product p = new BusinessLogic.Product(itemId);
            tempItem.productName = ProductMapper.getProductById(p).Name;

            if (editing == true)
            {
            }
            else if (editing == false)
            {
                CatalogItem.insertCatalogItem(tempItem);
            }
            CatalogScreen cs = new CatalogScreen(this.catalogId);

            cs.MdiParent = this.MdiParent;
            cs.Show();
            this.Close();
        }