When we went, my husband wore a polo shirt and nice kahki pants, I wore a skirt.
The disney web site said
Dress Code Guidelines:
Men: Khakis, slacks, jeans, dress shorts, collared shirts. Sport coats are optional.
Ladies: Capris, skirts, dresses, jeans, dress shorts.
NOT permitted in dining room: Tank tops, swimwear, hats for gentleman, cut offs, or torn clothing. While t-shirts are now allowed, the policy remains that t-shirts with offensive language and/or graphics are not acceptable.