We consider optimal distributed and boundary control problemsfor semilinear parabolic equations, where pointwise constraints onthe control and pointwise mixed control-state constraints of bottlenecktype are given. Our main result states the existence of regularLagrange multipliers for the state-constraints. Under naturalassumptions, we are able to show the existence of bounded and measurableLagrange multipliers. The method is based on results from the theoryof continuous linear programming problems.