One of my thoughts was to create a custom rule then, to serve as the action, but the problem I'm running into there is, how would I make a WFFM field required on the fly in C#? Researched online and didn't find anything.
I've found a resource that matched my exact scenario:
- If contact method selected is Phone, make the Phone field required
- If contact method selected is Email, make the Email field required
... but I don't understand it. I don't understand which part of the code is actually making the Contact Preference field required. Additionally, the code has some problems and I can't get it to build.
I am using Sitecore 8.0 with WFFM (unknown version).