(Portland, OR)  --  Portland police say a man pistol-whipped an employee during a robbery at a Milwaukie Avenue store.  Authorities say it took place around 2:40 yesterday afternoon at Milwaukie Market in Southeast Portland.  The employee told officers he was ordered to lie on the floor by two men who entered the store yesterday, and one of them hit him in the face with a gun before they got away with money from the register.  Police say the employee's five-year-old daughter was also in the store, but was able to safely hide while the robbery took place.