Can jotForm bind data to combobox ?

I want to bind data to combobox (dropdownlist). In addition to this when I selected combobox, child combobox should be open (parent-child relation like country-city). Can it do these events? Can I bind data from service,database etc. ?

Kindly try checking our Dynamic Dropdown Widget: http://widgets.jotform.com/widget/dynamic_dropdowns.

Otherwise, you can add a dropdown fields to your form and show the second dropdown based on the selection from the first dropdown.

Here's how you can do that:

https://www.jotform.com/help/316-How-to-show-or-hide-a-field-in-the-form-based-on-the-other-field-input-or-selection

Let us know if you need further assistance.

Thanks