Microsoft® Windows® Workflow Foundation Step by Step

Chapter 10. Event Activities

After completing this chapter, you will be able to:

• Using the HandleExternalEvent Activity

• Using the Delay Activity

• Using the EventDriven Activity

• Using the Listen Activity

• Using the EventHandlingScope Activity

With Chapter 8, you saw how a workflow communicates with its host application using the CallExternalMethod activity. When the workflow calls an external method, using a local communication service you provide, the host application receives an event. The host then processes the data and takes any appropriate actions.

The converse process involves the host application raising events to be handled by the workflow (although workflow event handling can be used for a far wider array of tasks than just host communication). ...