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Online WF4 presentation recordings

The recordings from my recent online Windows Workflow Foundation 4 presentation have been posted online. Get them while they are hot You can download the samples and PowerPoint from here . Streaming: http://developmentor.s3.amazonaws.com/webcasts/Meet-The-New-Workflow-WF4-Maurice-de-Beijer...

Posted to The Problem Solver by Maurice on Tue, Dec 8 2009
Filed under: Filed under: .NET, Workflow, webcast, WF4, VS2010
Activity correlation using a RequestReplyCorrelationInitializer

In my previous post about Windows Workflow Foundation 4 I used the CorrelationScope activity to arrange for the activity correlation between a Send and the related ReceiveReply activities. That is quite easy to do and personally I find things nice and easy to arrange with both messaging activities...

Posted to The Problem Solver by Maurice on Thu, Dec 3 2009
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010
Activity correlation in Windows Workflow Foundation 4

There are two types of correlation to think about in Windows Workflow Foundation: Message correlation Basically sending multiple requests to the same workflow. Activity correlation Making sure two activities work together. In this post I am going to show activity correlation Activity correlation...

Posted to The Problem Solver by Maurice on Wed, Dec 2 2009
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010
Online Workflow 4 presentation

Attached are the PowerPoint sheets and samples from my online Window Workflow Foundation 4 presentation today. Let me know if you have any questions. WF4Demo.zip www.TheProblemSolver.nl Wiki.WindowsWorkflowFoundation.eu

Posted to The Problem Solver by Maurice on Tue, Dec 1 2009
Filed under: Filed under: .NET, Workflow, WCF, webcast, WF4, VS2010
Creating complex activities in the workflow designer

In Windows Workflow Foundation 4 there are a number of “activities” in the designer that aren’t really activities but activity templates. The most obvious of there are the ReceiveAndSendReply and the SendAndReceiveReply in the Messaging section of the toolbox. If you search for either of these...

Posted to The Problem Solver by Maurice on Mon, Nov 30 2009
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010
Online presentation: Meet the New Workflow WF4

Tomorrow I will be doing an online presentation about Windows Workflow Foundation 4. The meeting lasts 1 hour and starts at 4PM European time, 3PM UTC or 7AM PST. The goal is to provide an overview of WF4 and how to get started with it in Visual Studio 2010. I will be doing the meeting using LiveMeeting...

Posted to The Problem Solver by Maurice on Mon, Nov 30 2009
Filed under: Filed under: .NET, Workflow, webcast, DevCenter, WF4, VS2010
TryCatch activity in WF4

I can’t say I am a fan of the way the TryCatch activity is implemented in Windows Workflow Foundation 4. For starters there is a Finally block where you can add some activities you want to execute. Sounds nice and very much like the try/catch/finally code construct we have in C# or Visual Basic. Except...

Posted to The Problem Solver by Maurice on Fri, Nov 27 2009
Filed under: Filed under: .NET, Workflow, WF4, VS2010
Windows Workflow Foundation 4 and persistence

The whole persistence model has changed quite a but for WF4. The persistence class out of the box is called SqlWorkflowInstanceStore and as the name suggests it saves workflow data in either SQL Server 2005 or 2008. It is based on the InstanceStore class to if you prefer some other store all you...

Posted to The Problem Solver by Maurice on Thu, Nov 19 2009
Filed under: Filed under: .NET, Workflow, WF4, VS2010
Flowcharts in Workflow 4 and the Switch activity

Flowcharts are a nice addition to Windows Workflow Foundation 4. They allow for a lot of pretty complex behavior that is hard to do in a sequential workflow. In WF 3 we used to model these complex behaviors as state machine workflows. That worked but they weren't really state machines or event driven...

Posted to The Problem Solver by Maurice on Tue, Oct 27 2009
Filed under: Filed under: .NET, Workflow, WF4, VS2010
Workflow 4 and Visual Basic expressions

When using Windows Workflow Foundation 4 you often need to enter expression in some activity property. The new thing is these expressions are all in the Visual Basic dialect regardless of what language you project is in. So when developing a project in C# the expressions are sill in Visual Basic. Weird...

Posted to The Problem Solver by Maurice on Mon, Oct 26 2009
Filed under: Filed under: .NET, NetFx3, Workflow, VB, WF4, VS2010
WF4&WCF and message correlation

In the previous blog posts, here , here and here , I demonstrated how to use WCF from WF4. This same some more about sending multiple messages to the same workflow, AKA Workflow Correlation. One of the ugly parts of Windows Workflow Foundation 3 was the message correlation part when you...

Posted to The Problem Solver by Maurice on Wed, Sep 2 2009
Filed under: Filed under: .NET, Workflow, WCF, DevCenter, WF4, VS2010
Sending your own objects to a WF4 workflow

In the previous two blog posts ( here and here ) I showed how to create and expose a Windows Workflow Foundation 4 workflow via WCF and have both a workflow and a regular C# client work with it. But the parameter and return value where real simple with just a string each. So how about passing some more...

Posted to The Problem Solver by Maurice on Thu, Aug 20 2009
Filed under: Filed under: .NET, NetFx3, Workflow, WCF, DevCenter, WF4, VS2010
Using Windows Workflow Foundation 4 Receive from an non WF client

In a previous blog post I described how to use the WorkflowServiceHost and host a workflow with a Receive activity that waits for WCF messages. I also added a WF4 client that called the service and received a response. However a lot of clients out there are not going to be workflows but “regular” code...

Posted to The Problem Solver by Maurice on Wed, Aug 19 2009
Filed under: Filed under: .NET, NetFx3, Workflow, WCF, WF4, VS2010
Combined DevelopMentor instructors blog feed.

Michael Kennedy , one of the co instructors from DevelopMentor , has created a combined feed from all the blogs of the various DevelopMentor. An awesome group of people with a lot of knowledge to share. Highly recommended in you RSS reader. http://feeds.feedburner.com/DevelopmentorInstructors ...

Posted to The Problem Solver by Maurice on Wed, Aug 19 2009
Filed under: Filed under: .NET, LINQ, Workflow, WCF, DevCenter, Silverlight, Data Access, ASP.NET, VS2010
Combining WCF and WF4

There are several ways to use WCF in combination with Windows Workflow Foundation 4. The two can be combined inside of a XAMLX file as Ron Jacobs describes here . Another option is using the WF4 Receive and SendReply activities and hosting the workflow yourself using a WorkflowServiceHost. This is quite...

Posted to The Problem Solver by Maurice on Wed, Aug 5 2009
Filed under: Filed under: .NET, Workflow, WF4, VS2010
Data and Windows Workflow Foundation 4

One thing that has completely changed in Windows Workflow Foundation is the way we work with data in a workflow. In WF 3 we used properties to store data. We could use regular .NET properties but most of the time dependency properties where the smarter choice. Dependency properties left the way...

Posted to The Problem Solver by Maurice on Mon, Jul 20 2009
Filed under: Filed under: .NET, Workflow, WF4, VS2010
Passing data into a Windows Workflow Foundation 4 workflow

Passing parameters into a workflow is similar in WF4 as it was in WF3. In both case a Dictionary<string, object> is passed in when creating the workflow instance object. Alternatively when using the WF4 WorkflowInvoker you can pass it into the Invoke() method. This is quite simple but I have never...

Posted to The Problem Solver by Maurice on Tue, Jun 30 2009
Filed under: Filed under: .NET, Workflow, VB, DevCenter, WF4, VS2010
The new Windows Workflow Foundation 4 runtime

With WF3 there was a central workflow runtime environment called the WorkflowRuntime and used to manage the lifetime of workflow instances. In WF4 this central class no longer exists and we manage individual workflows. To compare the two, this is what a minimal console application looks like in WF3....

Posted to The Problem Solver by Maurice on Tue, Jun 23 2009
Filed under: Filed under: .NET, Workflow, DevCenter, WF4, VS2010
Getting started with Windows Workflow Foundation 4

As you may have heard Windows Workflow Foundation 4 is not an upgrade from Windows Workflow Foundation 3 (or 3.5). The version numbers might suggest that the previous version was quite mature but in fact it refers to the version of the .NET framework. In fact Windows Workflow Foundation 3 was the first...

Posted to The Problem Solver by Maurice on Mon, Jun 22 2009
Filed under: Filed under: .NET, Workflow, DevCenter, WF4, VS2010
C# Dynamic - CSharp's new feature of the coming version 4.0

Very good resources for the coming version... Sam Ng Dynamic in C# Part One Dynamic in C# Part Two Chris Burrows C# Dynamic Part I C# Dynamic Part II C# Dynamic Part III Eric Lippert The Future of C# Part One The Future of C# Part Two The Future of C# Part Three The Future of C# Part Four PDC TL16: The...

Posted to Abu's blog by abu on Mon, Dec 15 2008
Filed under: Filed under: ASP.NET, .NET, C#, VS2010, OSLO

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