Scan substitution keys/merge fields(declared with ###) from word template and show on the interface

Question

Hi, 
 My requirement is that user can select already uploaded word template document(some substitution keys included in the template already) from a dropdown on a form. 
 After selecting, I have to scan all the substitution keys from the template and show in the grid on the same screen with 2 columns - field name(substitution key) and value(that will replace substitution key). 
 So, after submitting the form, the word document will be populated with those values. I know we can do this from process model with word from template smart service but my requirement is that substitution keys can vary in number. So, I have to get the values from the interface only.

Mathieu Drouin · Answer

I don't think the scanning part is possible. The best you can do is provide an inventory of pre-defined keys they can use in the word doc.

Mike Schmitt · Answer

The best you're going to be able to do is to offer them a variety of pre-loaded templates (and you can just store the substitution key strings somewhere else), and when they select one, launch a process model dedicated to the selected template.