Are you saying you are channeling force barrier and then BH throws electro net on you? Or are you trying to use force barrier after electro net is on you already?
If the former, I would think it would protect you. The later, not so much. As the barrier is a defensive measure, I would take that to mean it must be used in advance.
As I posted to the person above you, you can use it even when controlled. Electro Net is a Crowd Control measure. Force Barrier is designed to counter ALL CCs before application or after.