To achieve the desired result you will need to create a custom RadPrompt
and override its SetupBindingsAndCommands
For your convenience, I've prepared a small sample project with a possible implementation.
Please have a look and let me know if this would work for you.
Get quickly onboarded and successful
with your Telerik and/or Kendo UI products with the Virtual Classroom free technical training, available to all active customers. Learn More.