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How to bind to table whose value isn't in an Ultracombo's ValueList


I'm using an Ultracombo and binding it to a table's field like Order.DestinationCountry and the Datasource is another table Country so I can show two columns for the country's Code and Name. That works fine.

But if the DestinationCountry has been deleted from the Country table then the bound value doesn't show in the ultracombo.

I can't go through all Order records to find valid and invalid destination countries, that's not efficient. Plus I want only valid Country values in the Datasource so users can't select an invalid Country.

I'm thinking I have to bind an UltraTextEditor to Order.DestinationCountry then switch to the UltraCombo so users can select only valid a country.

Or is there another solution?