Product Configurator Combo Box Setting Default Value after DataLoad

How to Set a Default Value after the values are loaded to the Combo Box depending on the previous selection… like using SelectedIndex or any other Option on Configurator Designer.

on FormLoad Event use the below code.
Use below code
Ice.Core.Session session = ((Ice.Core.Session)this.oTrans.Session);
plntCmb.Value = session.PlantID;