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Your problem is not with variable resolver but rather the fact that your model contains different object than the selected value (which I assume is just a number (short))

So here my take on your scenario as a runnable ZK fiddle:

https://zkfiddle.org/sample/1002pcs/1-listbox-item-selection

Instead of your GenericLov I simply use a LinkedHashMap which is essentially the same.

Then I make sure the model contains only the Short numbers (which is the selected value as well), the display label is converted from Short to String using a @converter (For convenience I defined a read only converter for display purposes).

I expose both the list of countryCodes and the countryDisplayConverter via VariableResolver. However a variable resolver is not necessary here (you could simply have getters on the viewmodel returning the list of country codes and the converter).

I hope this helps, feel free post a modified version of the example in case you have further questions.

Your problem is not with variable resolver but rather the fact that your model contains different object than the selected value (which I assume is just a number (short))

So Since you didn't provide any error messages or runnable code I can't comment on why things are not working in your attempt. Instead here my take on your scenario as a runnable ZK fiddle:

https://zkfiddle.org/sample/1002pcs/1-listbox-item-selection

Instead of your GenericLov I simply use a LinkedHashMap which is essentially the same.

Then I make sure the model contains only the Short numbers (which is the selected value as well), the display label is converted from Short to String using a @converter (For convenience I defined a read only converter for display purposes).

I expose both the list of countryCodes and the countryDisplayConverter via VariableResolver. However a variable resolver is not necessary here (you could simply have getters on the viewmodel returning the list of country codes and the converter).

I hope this helps, feel free post a modified version of the example in case you have further questions.