I made a dropdown list that populates based upon a previous selection in a drop down list, so i can filter out what is in the drop down list. some of the selections from the first dropdown list do not result in a filtered list for the second list and that list is unpopulated, which is correct for the query.

I want to be able to set the property of the second list to 'not visible' if the results are null. I do not know how to check...