Ron Jacobs

Windows Workflow Foundation

Posts
  • Ron Jacobs

    Enterprise Library Webcast Series

    • 10 Comments
    Wow - Putting together a webcast series is a lot of work. I just finished the slides for configuration and data acess and I think you are really going to like what you see. I hope you will join us for the webcasts. The podcasts are really doing well....
  • Ron Jacobs

    How to: Implement a WCF Asynchronous Service Operation with Task<T>

    • 5 Comments
    I love Task<T>.  It has to be one of the finest innovations in the framework in the past few years.  Recently I was reviewing some old WCF documentation How to: Implement an Asynchronous Service Operation which was probably written in...
  • Ron Jacobs

    CleanProject - Cleans Visual Studio Solutions For Uploading or Email

    • 6 Comments
    You know those little tools you build to help in your development?  The ones that you slapped together in a hurry and might not work all the time but you put up with them because you don’t want to take the time to fix them?  Well CleanProject...
  • Ron Jacobs

    Extending ASP.NET MVC Account Registration with Workflow (WF4)

    • 7 Comments
    One thing that many web sites do is to verify email addresses by sending you an email to complete registration.  I decided to build a Registration system for ASP.NET MVC using Windows Workflow Foundation. When you create a new ASP.NET MVC web site...
  • Ron Jacobs

    How to do API Key Verification for REST Services in .NET 4

    • 6 Comments
    Recently somebody asked me about doing APIKey verification in .NET 4. Previously in .NET 3.5 we provided the REST Starter Kit which included a fair bit of server side code to enable a collection of RequestInterceptor objects that we showed doing API Key...
  • Ron Jacobs

    My Essential Development Tools

    • 12 Comments
    There are a few development tools that I just can’t live without. ReSharper A few years ago I was sitting in Glenn Block’s office when I noticed some strange additions to Visual Studio.  When I asked him about it he said “That’s ReSharper” and I...
  • Ron Jacobs

    Using the WCF Test Client to Test Your Workflow Service

    • 0 Comments
    If you need a quick and simple way to manually test your WorkflowService the WCF Test Client makes it simple but there are a few tips that will make your life much easier. Tip: Add the WCF Test Client to your Visual Studio Tools menu Select Tools / External...
  • Ron Jacobs

    Troubleshooting Workflow Services with diagnostic logging

    • 4 Comments
    Sometimes you have a workflow service that is misbehaving in a production environment.  How do you figure out what is going on when you can’t attach a debugger? The solution is to use Workflow Tracking.  There are two alternatives you can try...
  • Ron Jacobs

    How to create a Custom Activity Designer with Windows Workflow Foundation (WF4)

    • 0 Comments
    The Windows Workflow Foundation (WF4) - Custom Activity Designer sample demonstrates how you can build an activity and activity designer.  It includes three projects MyActivityLibrary - The activity library project MyActivityLibrary.Design - The...
  • Ron Jacobs

    My Last Post

    • 49 Comments
    A few months ago I wrote this post about my diagnosis with Adiposis Dolorosa (Dercum's Disease) . After writing it I had a brief reprieve from the symptoms and for a while I was able to work part time. Then in September I had surgery to remove some of...
  • Ron Jacobs

    MSTest [DeploymentItem] and Environment Variables

    • 3 Comments
    Today I’ve been fixing up the build system for Microsoft.Activities and Microsoft.Activities.UnitTesting.  Over time I’ve been using a combination of strange tools and batch files to build things but it became such a mess I decided to take the time...
  • Ron Jacobs

    Visual Studio 11 Preview and .NET 4 Platform Update 1 Side by Side Bug

    • 3 Comments
    If you install the Visual Studio 11 Preview release on a machine that has .NET 4 Platform Update 1 installed you will find that projects targeting .NET 4 Platform Update 1 will fail to build properly.  The error you will get is 'System.Activities...
  • Ron Jacobs

    What’s Up With Ron

    • 13 Comments
    Nearly every day I get email from someone asking for help.  I wish I had time to answer every question.  I used to answer more of them but recently I was diagnosed with Adiposis Dolorosa. Adiposis dolorosa , or Dercum disease, is a rare condition...
  • Ron Jacobs

    XamlInjector–Cannot create unknown type errors

    • 0 Comments
    If you are using Microsoft.Activities.UnitTesting.XamlInjector to mock activities you may run into an error like this. Test method XamlInjectorRepro.Test.UnitTest1.TestMethod1 threw exception: System.Xaml.XamlObjectWriterException: Cannot create unknown...
  • Ron Jacobs

    Troubleshooting Silverlight, WorkflowServices, WCF and Behavior Extensions

    • 0 Comments
    In my previous posts I’ve written about my experiences with WorkflowServices and Silverlight. Troubleshooting Workflow Services / Silverlight Using Workflow Services and Silverlight Together WorkflowServices, CanCreateInstance and Silverlight Problem...
  • Ron Jacobs

    The Amazing Race

    • 1 Comments
    I’ll never forget the first time I heard someone mention a “Race Condition”.  In my younger years when I was more worried about what people thought of me I was to embarrassed to admit that I didn’t really know what they were talking about. ...
  • Ron Jacobs

    WF4 WorkflowServices Troubleshooting Tip: Browse the XAMLX

    • 0 Comments
    I was doing some work on my Contoso HR Workflow Services sample application today when for some strange reason things were not working at all.  I found that when I tried to send a message to the Workflow Service from the ASP.NET code I got this exception...
  • Ron Jacobs

    How To Enable Service Metadata for Workflow Services

    • 0 Comments
    Try this… Create a new ASP.NET Web Application (MVC or Web Forms).  Then add a new a WCF Workflow Service to your web project. Now try to add a service reference to your workflow service.  It fails with an error. There was an error downloading...
  • Ron Jacobs

    What State is my StateMachine in?

    • 7 Comments
    Recently saw this question in the MSDN Workflow Forum Is there a (SetState) in the new StateMachine Activity? Many users of Workflow in .NET 3.5 took advantage of the StateMachineWorkflowInstance class to determine what state a workflow is in, and also...
  • Ron Jacobs

    How to make a library portable and data binding friendly at the same time?

    • 2 Comments
    Here is the challenge.  Create a portable library that could be used by almost anything including Console Apps, Windows Phone, ASP.NET, Xbox 360 Make it data binding friendly for targets like WPF, Silverlight and Windows 8 XAML Metro Apps by supporting...
  • Ron Jacobs

    Troubleshooting Workflow Services / Silverlight

    • 0 Comments
    From time to time I’ll hear from somebody who is trying to use a WCF Workflow Service with Silverlight as the client and they are getting this exception. System.ServiceModel.CommunicationException was unhandled by user code Message=An error occurred while...
  • Ron Jacobs

    How to use LINQ in a Workflow

    • 1 Comments
    Question Can I use a LINQ Query such as the following in a Workflow? private static void ShowQueryWithCode(IEnumerable< string > names) { Console.WriteLine( "Linq Query in Code - show names that start with 'R'" ); // Assuming there are...
  • Ron Jacobs

    Three Simple Rules for Better Debugging with WorkflowApplication

    • 3 Comments
    Developers often say that there is a steep learning curve with Windows Workflow Foundation (WF4).  I won’t deny that… instead, allow me to share three simple rules that will help you to get over that curve sooner and to make them easy to remember...
  • Ron Jacobs

    Less is More

    • 6 Comments
    I am a musician. Over the years I have played keyboards in many bands, traveling and performing mostly as a hobby. I’ll never forget what one of my mentors taught me. He said “The rest is just as important as the note” The rest is the part of the song...
  • Ron Jacobs

    Windows Workflow Foundation (WF4) ParallelFor Activity

    • 0 Comments
    In my previous posts I’ve been arguing that you can implement Task Parallelism with Windows Workflow Foundation (WF4).  This post is a part of a series on WF, Parallelism and Threading Windows Workflow Foundation (WF4) Activities and Threads The...
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