private void addButton_Click(object sender, EventArgs e) { if (catogoryChoice.Text == String.Empty) { MessageBox.Show("Please Select Category!"); return; } try { string ItemID = RestaurantMenu.addItem(itemName.Text, price.Text, catogoryChoice.Text); ListViewItem item = new ListViewItem(new String[] { ItemID, itemName.Text, catogoryChoice.Text, currency.toCurrency(price.Text) }); menuView.Items.Add(item); } catch (Exception ex) { MessageBox.Show("Unable to Add"); } }