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


Activity is the essence of workflow; even the workflow itself is an Activity. WF4 provides some build-in activities that can be used directly in the workflow designer panel. But many times, we need to create our own activities—for example, an activity that can send e-mail to inform someone about finishing a task or any other important thing. To define our own activity, we should write a class that implements the root abstract Activity or one of its predefined subclasses.

The following is the activity modeling class hierarchy diagram:

This chapter intends to provide readers not only with some additional activities besides the built-in activities, but also with some concepts on how to build our own activities.

Before moving ahead, please create two projects. The first is the ActivityLibrary project named ActivityLibrary.

The other is the Workflow Console Application named WorkflowConsoleApp.

Delete Workflow1.xaml, which is created by default. We will use these two projects throughout...