eBay GetMyeBaySelling API call not returning specified fields only

Question

I use eBay SDK 921 API with sandbox.

I want to get all my Items IDs (I have a lot of items and I want improve the performance), and I use this code:

GetMyeBaySellingCall apicall = new GetMyeBaySellingCall(this.Context);
apicall.DetailLevelList.Add(DetailLevelCodeType.ReturnAll);
apicall.ApiRequest.OutputSelector = new StringCollection(new string[] { "ItemID" });
apicall.GetMyeBaySelling();
var sellerlist = apicall.ActiveListReturn.ItemArray.ToArray();

but GetMyeBaySelling method returns all fields of the Items

Could you please help me to get the ItemIDs only

Answer 1

The documentation for the OutputSelector field states (emphasis added)

You do not have to specify the full path of the field unless the field you are specifying can be returned in multiple containers.

Since GetMyeBaySelling returns several items the field ItemID will be returned in multiple containers. You will therefore have to specify the full path.

apicall.ApiRequest.OutputSelector = new StringCollection(new string[] { "ActiveList.ItemArray.Item.ItemID" });