You can find the detailed response in the private support thread regarding the same topic (Ticket ID: 1161966), but I will also paste it here, so other members of the community that are interested can see it too:
Thank you for creating and supporting this UserVoice item
. Providing such a built-in functionality is currently no included in our immediate plans, but depending on the customer interest the feature request generates in the UserVoice portal, we can consider it in the future.
Meanwhile the only available option is a custom implementation, based on parsing the excel file such that an array of JSON objects that the Grid can be bound to, is produced. There are some third-party libraries that seem to be offering such a functionality, e.g.:
You can check them out and determine whether they could be of any use in your scenario.
I can also recommend the Progress Professional Services for any required assistance with custom implementation and custom-tailored solutions:
Typically, our roadmap and priorities depend largely on the business value and customer demand for specific components and features, but I can also present you an offering that may be relevant and applicable to your needs - our Feature Acceleration program.
It allows a customer to negotiate a certain component or functionality to be implemented on demand or sooner than our roadmap implies. Feature acceleration fits well in scenarios where a feature or enhancement is important for an application's success, but it is not planned to be available at the time of the application's completion.
Let me know if you are interested in pursuing this option or otherwise benefiting from the expertise of our Professional Services team at any time and I will put you in touch with them to discuss your exact specifications and possible timeframes.