How to handle ID's within XDevComboBox/ RapidClipse codebuilder?

Question

Inside a fieldgroup I would like to use a dropdown field XDevComboBox for modifying a value. The combobox get filled by a database table (works fine). The table has two fields, an id and a text-value. The textvalue should be visible and possible to select in the combobox. I am able to select the textvalue.

But in the code behind I need the id related to the textvalue.

Is there a way to handle this with build in functions of rapidclipse?