WF4, WCF and AppFabric Sessions @ PDC09

I’m taking this week off to catch up on everything I haven’t done the last two months and to celebrate the Thanksgiving holiday here in the US. PDC was a blast!  It was incredibly awesome to meet so many folks interested in WF and talking with others about how they are using (or plan to…

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A Few Additional Treats @ PDC09

One fun thing we will be doing this year is using the theater in our lounge/booth area to have a few chalk style presentations.  These will be brief 30 minute demo/ q&a / conversation sessions with somebody from the product team.  These will dive a little deeper and be more interactive about topics we know…

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Matt’s PDC Session List

I’m hoping that this PDC might be a little different and I may actually get to attend some sessions, rather than just prepping for mine (or the others from my team).  I’ve gone through all 22 pages of published talks, and I think there are some interesting ones.  So, without further ado, and with little,…

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Displaying Validation Errors in a Rehosted WF4 Designer

Here’s a quick one “I’d like to find out if the workflow in the designer is valid… is there someway to retrieve the validation errors?” Yes, the short answer is that you need to provide an implementation IValidationErrorService.  There is one important method to implement on this interface, ShowValidationErrors which will pass you a list…

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Got a cool .NET app? Hang with Tortoises for 12 days

photo courtesy of flickr user mikeweston  This is a something that the .NET team is putting together that has a contest with super cool prizes (seriously, 12 day trip to the Galapagos, for real (as my 4 year old says)).  (obligatory legalese here). If you’ve built a sweet app with the .NET framework, we’d like…

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Finding the Variables in Scope Within the WF Designer

In this thread, one of our forum customers asked the question: “how do I find all of the variables that are in scope for a given activity in the designer?” We do not have a public API to do this.  Internally we have a helper type called VariableHelper that we use to display the list…

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WF4 Beta1 => Beta2 Breaking Changes Document Published

Fresh on microsoft.com downloads, you can get the details of the major breaking changes that occurred for WF between Beta 1 and Beta 2. Get the document here. We will publish a similar document for any changes between Beta2 and RTM, although that list should be on the shorter side.  If you have feedback on…

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