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

Debugging a WF program

In this task, we will debug a WF program.

How to do it...

  1. Create a workflow project:

    Create a new Workflow Console Application project under the Charpter01 solution. Name the project as DebugWFProgram. In the opening WF designer panel, author a workflow as shown in the following screenshot:

  2. Create workflow host code:

    Open Program.cs file and change the code to:

    using System.Activities;
    using System.Activities.Statements;
    namespace DebugWFProgram{
        class Program{
            static void Main(string[] args){
                WorkflowInvoker.Invoke(new Workflow1()
                    InMessage="In Message"
  3. Set a debug break point:

    Right-click an activity and select Breadpoint | Insert Breakpoint to add debug break point.

  4. Debug it:

    Press F5 to debug the WF Program; we can refer the following screenshot:

There's more...

We can also debug an XAML workflow. Open Workflow with the XML editor, insert some breakpoints, then press F5; we will see the breakpoints as shown in the following screenshot: