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  • 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 right? Well not really when you think about it! After all power business users are expected to be able to modify workflows. And guess what their favorite tools are. That would be Microsoft Excel and
    Posted to The Problem Solver (Weblog) by Maurice on Mon, Oct 26 2009
    Filed under: .NET, NetFx3, Workflow, VB, WF4, VS2010
  • Call for speakers: 3rd Dutch Code Camp

    Op 21 november 2009 organiseren de SDN, de dotNED User Group en VBcentral.nl samen de derde Nederlandse Code Camp. Een unieke dag, voortkomend uit een unieke samenwerking. Kenmerkend aan deze dag is, dat het een evenement is dóór ontwikkelaars en vóór ontwikkelaars! We zijn op zoek naar collega ontwikkelaars die het leuk vinden om ook een sessie voor hun rekening te nemen. Er is ruimte voor de meer traditionele sessies, maar bijvoorbeeld ook voor Chalk & Talk sessies. In principe is zijn de mogelijke
    Posted to The Problem Solver (Weblog) by Maurice on Mon, Oct 26 2009
    Filed under: .NET, SDN, CodeCamp
  • Workflow parameters in Window Workflow Foundation 4

    Creating parameters for a workflow is quite easy to do in WF 4. Just open the arguments tab in the workflow and add each input or output parameter you need and the required type.   Now in WF 3 passing data to a workflow was done using a Dictionary<string, object> to specify the input. This is very flexible but also very brittle as it is all magic of key names matching property names. This approach still works as the following code demonstrates. var input = new Dictionary< string , object
    Posted to The Problem Solver (Weblog) by Maurice on Fri, Oct 23 2009
    Filed under: Workflow, WF4, VS2010
  • Windows 7 and booting from a virtual hard disk

    One real nice feature in Windows 7 is the boot from VHD capability. Real simple to do once you know the basics. And these basics are all covered in 2 blog posts by Scott Hanselman. So rather that repeat the information I am just going to point to his blog posts. Step-By-Step: Turning a Windows 7 DVD or ISO into a Bootable VHD Virtual Machine Less Virtual, More Machine - Windows 7 and the magic of Boot to VHD Enjoy!   www.TheProblemSolver.nl Wiki.WindowsWorkflowFoundation.eu www.twitter.com/mauricedb
    Posted to The Problem Solver (Weblog) by Maurice on Tue, Oct 20 2009
  • Nederlandse CodeCamp 2009

    Op 21 november 2009 organiseren de SDN , Stichting dotNed en VBcentral samen het derde Nederlandse Code Camp . Dit is een dag lang met code, code sharing, freaking en gezellig samenzijn. Een evenement door ontwikkelaars, voor ontwikkelaars. De regie ligt voor een belangrijk deel bij de deelnemers! Het aantal plaatsen voor deelnemers is wel beperkt tot maximaal 150. Wacht dus niet te lang met beslissen want voor je het weet is er geen plaats meer. Vergeet bij je aanmelding niet op te geven welke onderwerpen
    Posted to The Problem Solver (Weblog) by Maurice on Mon, Oct 19 2009
    Filed under: .NET, Visual FoxPro, LINQ, NetFx3, Workflow, VSTO, WCF, VB, webcast, ClickOnce, WPF, Silverlight, SDN, Data Access, ASP.NET
  • Nationale Office Dag files

    Looking for the slides and samples from my two presentations at the Nationale Office Dag in Ede? You can download them from here . Enjoy!   www.TheProblemSolver.nl Wiki.WindowsWorkflowFoundation.eu
    Posted to The Problem Solver (Weblog) by Maurice on Thu, Oct 15 2009
    Filed under: .NET, VSTO, VB
  • 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 used WCF to send multiple messages to the same workflow. When using WF3 you where forced to use one of the context bindings like BasicHttpContextBinding or WSHttpContextBinding. Not only that but you
    Posted to The Problem Solver (Weblog) by Maurice on Wed, Sep 2 2009
    Filed under: .NET, Workflow, WCF, DevCenter, WF4, VS2010
  • .NET Events site bijgewerkt met iCalendar optie

    Ik heb zojuist een nieuwe versie van .NET Events in Nederland beschikbaar gemaakt.   Nieuw is de mogelijkheid om de gegevens ook als iCalendar agenda binnen te halen in Microsoft Outlook of een andere agenda die met een iCalendar feed om kan gaan. Wel zo handig om te zien of er conflicten zijn met andere afspraken als je naar een bijeenkomst wil gaan. Hoe het een en ander in 4 eenvoudige stappen in Outlook 2007 moet configureren staat hier .   En zoals altijd, weet je een bijeenkomst die
    Posted to The Problem Solver (Weblog) by Maurice on Mon, Aug 24 2009
    Filed under: .NET
  • 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 complex data.   To show how to do so I will replace the singe string with a person object. Admittedly not the most complex person with only an id, first and last name and their birth date but
    Posted to The Problem Solver (Weblog) by Maurice on Thu, Aug 20 2009
    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 that calls into out workflow. So what does it take to have a simple console application talk to our WF4 service?   The first thing we need is an service contract describing the operation we can
    Posted to The Problem Solver (Weblog) by Maurice on Wed, Aug 19 2009
    Filed under: .NET, NetFx3, Workflow, WCF, WF4, VS2010
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