private void createButton_Click(object sender, EventArgs e) { if (!(name.Text == "" || materialCombo.SelectedIndex == -1 || drawerCombo.SelectedIndex == -1 || rushCombo.SelectedIndex == -1)) { newQuote.customerName = name.Text; newQuote.desk.Depth = (int)DepthNum.Value; newQuote.desk.Width = (int)WidthNum.Value; int index = materialCombo.SelectedIndex; newQuote.desk.Material = (Desk.Surface)index; index = drawerCombo.SelectedIndex; newQuote.desk.DrawerNum = index; index = rushCombo.SelectedIndex; newQuote.DeliveryType = (DeskQuote.Delivery)index; newQuote.CalCost(); ShowQuote addNewQuoteForm = new ShowQuote(newQuote); addNewQuoteForm.Tag = this; addNewQuoteForm.Show(this); Hide(); } else { MessageBox.Show("Please enter all valuesf!"); } }