OOC-Not unless you have something thats giving you additional actions. you only get 1 free, 1 swift, usually 1 immediate, and either 1 full + a 5 ft step or 1 move and 1 standard. Activating a magic item is a spell completion action which counts as a standard. So using the D-door from an item is standard then you could move, but you couldn't D-door and blast without a special item.