I define a custom characteristic? This feature is a drop-down box, the properties of an attribute: listItem, I'd like to know how listItem from the database load data?
Think of this problem for a long time, but also do not have the idea.
Can also be considered from the view of the load, but also do not know how to write, mainly is not sure type, because the drop-down box like binding, provide the table name and listing, query, get data, then set to the drop-down box.