Does Convention center Here Have Restaurants Or Food quarts inside?

Not regularly accessible. Only open during events, to event patrons. The Craft Bar and Grill is scheduled in relation to events, otherwise a couple vending machines, and Dunn Brothers Coffee shop is usually open 0700-1700

Dunn brothers is good. The concession stands are hit and miss.

There is a coffee shop. Each hall has a consession stand open during show hours.

There are small shops. However, there are hundreds of establishments that can be accessed through the Skyway system, which is a series of walkways connecting the convention center with the other buildings in Minneapolis. You can find a map of the Skyway system and the restaurants connected to it by doing a Google search for "Minneapolis skyway map"

I was a guest but they had a kitchen so most likely

There was a coffee place with a small amount of food offerings and two other food counters that I saw. Not the best, not the worst...

Theres a Dunn's brother coffee shop.

There is a Coffee shop available in the convention center with limited options. The skyway or quick walk can bring you to many notable restaurants, quick bites, coffee shops and bars. A note that many restaurants within the Skyway system have limited hours.

For specific events I've attended there have been food and drink kiosks, but no sit down restaurant.

There are food area's and a Dunn Brother's. However, I do believe the food kiosks are only open at peak times.