/// <summary>
/// Called when Button SendToViewModel is clicked
/// </summary>
private void OnAdd()
{
ProductInfo productInfo = new ProductInfo();
productInfo.setUnitPrice(Price);
productInfo.setQuantity(OrderItemQuantity);
productInfo.setDiscount(OrderItemDiscount);
productInfo.setPurchaseOrderNo(productInfo.getPurchaseOrderNo());
List productList = new ArrayList();
productList.add(productInfo);
SaleInfo saleInfo = new SaleInfo();
CustomerInfo customerInfo = new CustomerInfo();
saleInfo.setProductList(productList);
saleInfo.setCustomerUserId(customerInfo.getUserInfo().getId());
saleInfo.setOrderNo(saleInfo.getOrderNo());
saleInfo.setStatusId(saleInfo.getStatusId());
saleInfo.setRemarks(saleInfo.getRemarks());
SaleManager saleManager = new SaleManager();
saleManager.addSaleOrder(saleInfo);
MessageBox.Show("Save Successfully");
}