By request from many customers using the e-conomic Stock Management add-on module, we have now exposed price groups in the API:

1. The IDebtor and IDebtorData classes now expose a PriceGroup property.
2. The IPriceGroup interface has a GetPrice(IProduct oProduct) method.

Note that both of the above are only available for customers using the Stock Management add-on module.

If no special price is defined on the supplied product in the product group, the product's default sales price will be returned. This will save you some round-trips

Note that the price group may not be set on all customers - so doing something like this would be very bad practice:

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objCurrentInvoiceLineData.UnitNetPrice = objDebtor.PriceGroup.GetPrice (objProduct);


- since it may obviously result in your language's choice of NULL-pointer exception...

Another tempting approach is something like this:

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objCurrentInvoiceLineData.UnitNetPrice = (objDebtor.PriceGroup != null ? objDebtor.PriceGroup.GetPrice (objProduct) : objProduct.SalesPrice);


While this won't result in errors per se, you'd be reading the PriceGroup property twice, resulting in two round-trips.

The best approach is this.

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IPriceGroup pg = objDebtor.PriceGroup;
objCurrentInvoiceLineData.UnitNetPrice = (pg != null ? pg.GetPrice (objProduct) : objProduct.SalesPrice);


If you're using .NET, to use this feature, you'll have to use the latest version of our .NET assembly - which is available here.