Microsoft® Windows® Workflow Foundation Step by Step

Chapter 18 Quick Reference

To	Do This
Call an XML Web service from your workflow	Use the InvokeWebService activity. Although you can use a Code activity with a Web reference and proxy, using InvokeWebService brings the invocation into the workflow designer instead of hiding it within a Code activity. You also can bind properties to the activity, which is handy.
Dynamically reconfigure your proxy prior to making the XML Web service invocation	Provide an event handler for the Invoking event, and access the InvokeWebServiceEventArgs WebServiceProxy property (cast to your proxy type) to gain access to any of the typical proxy properties.
Tie separate InvokeWebService calls to a single session	Provide the same SessionId value to each instance of InvokeWebService ...