Microsoft® Windows® Workflow Foundation Step by Step

Using the State Activity

Perhaps not too surprisingly, the State activity models a state in your state-based workflow. It’s a composite activity, but it’s limited to accepting only certain types of activities as children: the EventDriven activity, the StateInitialization activity, the StateFinalization activity, and other State activities. The EventDriven activity waits for the events that will cause a transition to another state, while StateInitialization and StateFinalization are activities guaranteed to execute when a state is transitioned into and out of, respectively. It might seem odd to be able to drop a secondary State activity into an existing State activity, but the intent is to provide the capability for embedding child state machines ...