In ASP.Net, for DropDownLists, we had the DataSource or DataSourceID, the DataTextField, for the text that is acthally seen in the DropDownlist, and the DataValueField, for the unseen value of each item.

For a ComboBox, the terminolgy changes a little. We have the ItemSource, the DisplayMemberPath, and the SelectedValuePath (which, IMHO, seems very odd use of the word ‘Selected’)