Book Image

Microsoft Windows Workflow Foundation 4.0 Cookbook

By : Andrew Zhu
Book Image

Microsoft Windows Workflow Foundation 4.0 Cookbook

By: Andrew Zhu

Overview of this book

Windows Workflow Foundation 4.0 (WF) is a significant part of .NET Framework 4.0. WF makes workflow technology available to every single programmer that uses the .NET Framework 4.0. It is easy to create long running and distributed programs using WF with the right knowledge. With this book, you will discover that working with workflows is easy. This book provides both step-by-step recipes and relevant background information. It covers all the important aspects of Windows Workflow Foundation 4.0. The best thing about this book is that all recipes are based on real-world experiences of Andrew Zhu. Andrew is a global WF and BizTalk technology support engineer for Microsoft. This book covers everything you need to know, when working with workflows. Get to grips with flow control activities, messaging, and transaction processes with easy to understand steps followed by explanations. You will quickly learn to use collection and custom WF activities and WF services.You will see recipes that illustrate integration of Windows Workflow with other applications such as WPF, ASP.NET, WCF service.Lastly, you will discover how easily you can customize W4 Designer with WF rule engine and others.
Table of Contents (15 chapters)
Microsoft Windows Workflow Foundation 4.0 Cookbook
About the Author
About the Reviewers

Receiving and replying to a WCF message

In this task, we will create a workflow with Receive and SendReply activities, and run a workflow as a WCF service. This workflow will accept two integer numbers and return their sum to the caller. We will use WCF Test Client to test the service.

How to do it...

  1. Create a workflow project:

    Create a new WCF Workflow Service Application project and name it ReceiveAndReply; refer to the following screenshot:

  2. Create a workflow:

    Open the default created Service1.xamlx. We need to perform the following actions:

    1. Add two Int32 type WF4 Variables x and y to the Sequential Service scope.

    2. Click the View parameter… link of the ReceiveRequest activity and add two Int32 type service parameters xIn and yIn as shown in the following screenshot:

    3. Right-click the ReceiveRequest activity and select Properties; the properties should be set as shown in the screenshot:

    4. Click the View parameter… link of the SendResponse activity and add an Int32 type service parameter named...