No easy to answer your question. There are as many violets with different behaviours as there are different people :o)
Some of them don't like shade place at all !(pedata, pedatifida, alpine violets and so on). If violets grown in part shade place is not because they don't like the sun but 'cause they enjoy moist place: the more they get sun, the more they flower.
I'm not sure making violets survive is a good idea, i'ts breaking my heart ;o)
Well, may I suggest odorata....if the shade is not too tought, you'll have a very few flowers, if it's too dense, they won't survive. Hard to say as long as I can't see the place you're talking about :-)

All the best :-)
Thierry.