Introit - call it whatever, but today I’m recycling an old post. And I have one more little confession. When I started writing a new rehosted app today, I found out my old toolbox FAQ was fairly useless. It was even getting to the point where someone had to post this in the forum : “I...

Here’s a workflow designer FAQ finally getting the attention it deserves, and helping show off how to do custom property editing in designer. “How do I show an InArgument<bool>/<enum> in the property grid as a checkbox/combobox?”   [Aside: Before we start the guide, note that actually...

[Update: Dear Readers, To those of you who found this post interesting, but still a little too vague on how exactly you can use extensions for workflow-host communications, how this ties in with bookmarking, or what might be involved in implementing your own custom Send/Receive semantics in a workflow...

[Update! There are some bugs with the attached code, see the sequel post for discussion of bug fixes.] My workmate Ramraj mentioned that a long way back (during earlier milestones of WF 4.0) something was invented for XAML called a property reference , which was a feature that in the workflow designer...

A few people have noticed in the Workflow Foundation Beta 2 forums that the looping constructs provided in System.Activities.Statements such as While activity, ForEach activity, and ParallelForEach lack certain features found in their C# counterparts - there is no break or continue statement. This seemed...

This post is Part 2 of a series on writing custom activity designers. [ Part 1 - Part 2 - Part 3 - Part 4 - Part 5 ] Last time we found out that ICompositeView .OnItemsDelete() will never get called - unless we tell our contained activities exactly which composite view they belong to. But we didn...

[This post is Part 1 of a series on writing custom activity designers. Part 2 - Part 3 - Part 4 – Part 5 – Part 6 – Part 7 ] Motivation: Building an activity like Flowchart Creating composite activities and designers in Workflow Foundation 4.0 is really easy when you use WorkflowItemPresenter and WorkflowItemsPresenter...