The website provides gift certificates with customer selected amounts (in $25 increments). How do I provide this functionality using the web service?

How do I add the product to an order with the specified value?

I was adding products to the order via Orders_Order_AddItem_ByBvin().

Can I continue to use that and then:
1) Refresh the local order object
2) Find the gift certificate's line item in the order
3) Set the gift certificate's line item base price
4) Update the order via Orders_Order_Update()


Or do I need to create the line item and add it via Orders_Order_AddItem()?
If i need to create the line item, what needs to be set?

The first way I suggested (add the line item, refresh order, set base price, update order) isn't working. The base price after the refresh is $75 (site default).

Should I be updating the base price/order differently?

If not, what lineItem properties are required if I were to use Orders_Order_AddItem()?

Maybe I wasn't clear enough, but that's what I was asking about in post #3.

When creating the LineItem and adding it to the Order using Orders_Order_AddItem(), what LineItem properties need to be set?

I created the line item and set the properties you specified, along with the user supplied base price. But after you add it to the order, the price is $75 (default) again.

This is how I added the item:
//Get the gift certificate's product info
WebServices3.Product productInfo = ws.Catalog_InternalProduct_FindByBvin(ref token, productBvin.ToString());

//Set the gift certificate's lineItem base price to reflect the requested amount
WebServices3.LineItem giftCertLineItem = new WebServices3.LineItem();
giftCertLineItem.ProductId = productInfo.Bvin;
giftCertLineItem.ProductName = productInfo.ProductName;
giftCertLineItem.ProductShortDescription = productInfo.ShortDescription;
giftCertLineItem.ProductSku = productInfo.Sku;
giftCertLineItem.BasePrice = giftCardAmount;
giftCertLineItem.Quantity = prodQuantity;

ws.Orders_Order_AddItem(ref token, order, giftCertLineItem)


I also tried adding the product by bvin, then updating the base price via Orders_LineItem_Update(). This worked but it's an issue when there are multiple gift certificates in the order (I was using the product's bvin to find the line item in the order).

Can I assume that the list of line items in the order are in the same sequence they were added?

If they are, I can just update the last lineItem in the order's array. (Assuming I change the base price immediately after adding the product/lineItem).

Sorry for the delay.

It looks like you actually can't do it using Orders_Order_AddItem because the price is automatically reset to the default. I haven't tested it the other way (using Orders_LineItem_Update after adding the item), but you said that it worked, so that's probably how it will need to be done. I'm pretty sure that items that are added in BV will always be added sequentially, so that shouldn't be a problem. But something else you could do would be to manually set the bvin on the LineItem before you add it (using Guid.NewGuid().ToString()) and then look up the item using that bvin. That will guarantee that you are looking up the right product.