Question

I’ve noticed the System.Activities.Core.Presentation assembly contains several designers, and I’ve found them to be quite useful for re-usability.

I’ve now found myself creating activities that need to say “Drop activity here” (they accept a child activity). This is seen all over the place with the built-in WF activities, so I assume there must be some designer, e.g., DropHereDesigner, somewhere. I can reproduce it with XAML, but I don’t want to unless I must.

Anyone know if this designer can be found anywhere in the WF built-in libraries?

Answer 1

The WorkflowItemPresenter is used for this functionality.

<WorkflowItemPresenter
    xmlns="clrnamespace:System.Activities.Presentation;assembly=System.Activities.Presentation"
    HintText="Drop activity here"
    Item="{Binding Path=ModelItem.Child.Handler}" />

However, if you are asking “Can I get away with not touching XAML in order to create a designer” the answer is amost assuredly no.