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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
What does Windows Workflow Foundation 4 mean for existing workflow developers?

The question of what Windows Workflow Foundation version 4 means for developers currently developing using WF recently came up. As I mentioned before WF 4 is a complete rewrite and doesn’t use any of the existing WF 3 classes. The design of WF 4 is even quite different from the design of WF 3...

Posted to The Problem Solver by Maurice on Fri, Jul 3 2009
Filed under: Filed under: .NET, NetFx3, Workflow, DevCenter, WF4
Want to download all MIX sessions?

Then you should check Mike Swanson’s blog post here . He has two batch files, the first downloads all MIX session recordings with in the format you like, the second renames them so it is easier to make sense of all the media file names. If you just want a list of all sessions with download links this...

Posted to The Problem Solver by Maurice on Tue, Mar 31 2009
Filed under: Filed under: .NET, LINQ, NetFx3, WCF, VB, webcast, DevCenter, WPF, IronPython, Silverlight, ASP.NET
Samples and PowerPoint from my WCF talk

Attached is are the samples and slides I used for my intro into WCF talk yesterday at the VB Central meeting in the Netherlands. Download samples Enjoy! www.TheProblemSolver.nl Wiki.WindowsWorkflowFoundation.eu Now also on twitter at http://twitter.com/mauricedb

Posted to The Problem Solver by Maurice on Tue, Mar 10 2009
Filed under: Filed under: .NET, NetFx3, WCF, VB, DevCenter
Using a TransactionScopeActivity with a WCF ReceiveActivity revisited

Last year Marcel and I worked on a problem using a TransactionScopeActivity inside a WCF ReceiveActivity. I blogged a number of time about our finding, for example here . Last week I heard from Marcel that a hotfix was finally available that solves this problem. He blogged about it here . Great work...

Posted to The Problem Solver by Maurice on Tue, Mar 10 2009
Filed under: Filed under: .NET, NetFx3, Workflow, WCF, VB, DevCenter
Looking back at the MVP Summit

Last week lots of MVP, myself included, where in Redmond visiting Microsoft on our yearly MVP pilgrimage. The MVP Summit is always a great event. Not only do we get to talk to the MS team members who actually design and build all the software we love and use but we also get to meet each other. And with...

Posted to The Problem Solver by Maurice on Sat, Mar 7 2009
Filed under: Filed under: .NET, LINQ, NetFx3, Workflow, WCF, VB, DevCenter, WPF, Silverlight, WF4
Patterns & Practices release Prism version 2

The Patterns & Practices group at Microsoft have just released Prism version 2. I am pretty exited about this because Prism version 2 supports both WPF and Silverlight. And as it makes extensive use of the Model - View - ViewModel amongst other design patterns it is a great place to learn, even if...

Posted to The Problem Solver by Maurice on Wed, Feb 18 2009
Filed under: Filed under: .NET, NetFx3, DevCenter, WPF, Silverlight
Lazy loading using Ninject

In my previous blog post I demonstrated how you can use Ninject in your Silverlight application to automatically inject dependencies and make live easier. In the sample I injected the dependency, the PingService, inside my PageModel constructor. That worked just fine because the PingService is lightweight...

Posted to The Problem Solver by Maurice on Tue, Feb 10 2009
Filed under: Filed under: .NET, NetFx3, WCF, DevCenter, Silverlight
Using Ninject with Silverlight to make you code more testable

One useful feature when developing more complex code is using an inversion of control (IOC) container to do dependency injection. The basic principal of inversion of control, or dependency injection, is to pass in any dependencies when an object is created and not create them when needed. This way the...

Posted to The Problem Solver by Maurice on Mon, Feb 9 2009
Filed under: Filed under: .NET, NetFx3, WCF, DevCenter, Silverlight
Consuming an ADO.NET Data Service from Silverlight

When developing Silverlight line of business (LOB) applications we often need to get at some data from a database. There are various ways to do so. One option that is easy to get started with with is creating an ADO.NET Entity Data Model (EDM) and exposing that entity model using an ADO.NET Data Service...

Posted to The Problem Solver by Maurice on Tue, Jan 6 2009
Filed under: Filed under: .NET, LINQ, NetFx3, WCF, DevCenter, Silverlight, Data Access
Unit testing in Silverlight part 3

Part 1 Part 2 Part 3 Part 4 This post continues on my previous two post on using the Microsoft Silverlight Unit Test Framework. You can find part 1 here and part 2 here . In the second blog post I showed how to create a wrapper around the WebClient class, the TestableWebClient, so we can actually test...

Posted to The Problem Solver by Maurice on Sun, Dec 28 2008
Filed under: Filed under: .NET, NetFx3, DevCenter, Silverlight
Data validation - Silverlight versus WPF

When I am creating business applications validating the data in business objects, and displaying any errors, is always a big deal. Even though WPF and Silverlight both use XAML and support data binding the default way to display errors is quite different. Now I am focusing on validation in the business...

Posted to The Problem Solver by Maurice on Wed, Dec 24 2008
Filed under: Filed under: .NET, NetFx3, DevCenter, WPF, Silverlight
WrapPanel in ListBox revisited

Last week logged about using a WrapPanel in a listBox and demonstrated how to get the content to wrap around, read about it here . Turns out the XAML can be even easier. In the previous post I used a ControlTemplate with a Grid to stop the WrapPanel from just expanding horizontally. Turns out there us...

Posted to The Problem Solver by Maurice on Mon, Dec 8 2008
Filed under: Filed under: .NET, NetFx3, VB, DevCenter, WPF, Silverlight
Unit testing in Silverlight part 2

Part 1 Part 2 Part 3 Part 4 In my previous post I described the basic setup of unit testing in Silverlight, you can read all about it here . The basics where very nice but lots of code we write in Silverlight has to do with networking and in Silverlight that means asynchronous code, something that is...

Posted to The Problem Solver by Maurice on Sun, Dec 7 2008
Filed under: Filed under: .NET, NetFx3, VB, DevCenter, WPF, Silverlight
Unit testing and Windows Workflow Foundation

A while a go I wrote some posts about unit testing Windows Workflow foundation Activities, you can find the posts here and here . Fortunately I am not the only one who thinks unit testing is important as you can find various other blog posts about it like this one from Ron Jacobs. But Cliff Simpkins...

Posted to The Problem Solver by Maurice on Wed, Dec 3 2008
Filed under: Filed under: .NET, NetFx3, Workflow, VB, DevCenter
Updated SQL Server Compact Workflow Persistence Service

Yesterday I uploaded a new version of the SQL Server Compact Workflow Persistence Service to code.msdn.com. No major changes this time just two new features to get it more in line with the standard SqlWorkflowPersistenceService. I added a GetAllWorkflows() function that returns all persisted workflow's...

Posted to The Problem Solver by Maurice on Wed, Nov 12 2008
Filed under: Filed under: .NET, LINQ, NetFx3, Workflow, VB, DevCenter, SqlCe
PDC session download

Want to download and watch all PDC content? Then there are a couple of ways to get at them. The official way if to go through the session agenda at the conference site. See https://sessions.microsoftpdc.com/public/timeline.aspx . You see all sessions but it takes a bit of work. Another nice way is through...

Posted to The Problem Solver by Maurice on Sat, Nov 1 2008
Filed under: Filed under: .NET, LINQ, NetFx3, Workflow, VSTO, WCF, VB, webcast, DevCenter, ClickOnce, WPF, SqlCe, IronPython, Silverlight, PDC
Using the ReplicatorActivity in Parallel mode

I have heard quite a few times that the ReplicatorActivity can only be use in parallel mode with a custom activity. The reason being that you need an extra property to store the current child data. When the ReplicatorActivity works in sequential mode the following code works just fine: private void codeActivity1_ExecuteCode...

Posted to The Problem Solver by Maurice on Wed, Oct 22 2008
Filed under: Filed under: .NET, NetFx3, DevCenter, WPF
Using collections of custom objects in a workflow

Last week during my Chalk & Talk session at the SDC one of the attendees was having problems with workflow persistence and collections of custom objects. Now I never got to see his code so I am not sure what the problem was but maybe this simple sample will convince him that this should work. So...

Posted to The Problem Solver by Maurice on Thu, Oct 16 2008
Filed under: Filed under: .NET, NetFx3, Workflow, DevCenter
Versioning long running workflows part 4

Part 1 Part 2 Part 3 Part 4 In the previous blog posts we made sure we could have multiple versions of the same workflow running side by side. This ability is one of the more powerful concepts of WF and a real must have for long running business applications. A quick recap. Always version your assemblies...

Posted to The Problem Solver by Maurice on Mon, Sep 22 2008
Filed under: Filed under: .NET, NetFx3, Workflow, VB, DevCenter

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