December, 2009

A couple of customers have asked this one, as they work with the Programming Model, how do I know if an activity has been drag-dropped vs Copy-Pasted vs an Undo-Redo happened. How do the customers use it? Well, for one of them they wanted to change the name of the activity if it is a Copy-Paste as against a Undo_Redo. For example. In case of a Copy-Pasted activity, the new name should be Sequence2. While for a Undo-Redo, the name should still be Sequence1. The bad news is there is no simple way to...

Note: I apologize in advance if this first post seems unorganized. There is a lot of material to cover and I couldn’t find a really good way to order the topics. Hang in there and hopefully it will start making sense. In order to help everyone get up to speed with build customization, I wanted to take a few posts to share our collective knowledge on the Workflow framework in .NET 4.0. In this first post I plan to tackle the different base classes that may be used when designing your own custom activities...

The ExpressionTextBox sample code in the SDK works just fine in beta 2. The sample demonstrates the use of an ExpressionTextBox in a custom activity designer. In the sample, I implemented a simple MultiAssign activity, which assigns two values to two variables. In the example, I used untyped InArguments and OutArguments. That particular example was bad for a couple of reasons: If you don’t specify an ExpressionType on an ExpressionTextBox, you get a weird red box around invalid expressions inside...