Question

Ive got a really frustrating bug going on with Blend 4, when i edit a control template with triggers, if i switch to one of the triggers, the trigger changes are not shown in the design pane, its like ive turned off trigger rendering somehow

Reproduction Steps

Create a new WPF application in visual studio 2010
Open new solution in blend
Drag a “SimpleButton” onto the design surface
Right click on the button>Edit Style>Edit Current
On the triggers tab, select any of the triggers and nothing changes in the design view

This behaviour only appears if
The style is defined in a resource dictionary
The template is contained within a style, ie , not

Does anyone know any workarounds or fixes for this, i get it on both my home and work machines

Answer 1

I got a reply on the expression forums, they have confirmed it as a bug, here’s the reply

Thanks for bringing this to our
attention, we’ve confirmed this
regression from V3 behavior and we’ve
filed a bug. If you select a trigger,
even though it doesn’t appear to be
selected (the artboard doesn’t
immediately update), changes are
recorded at leaves. And we have
noticed behavior that you might want
to use as a workaround. If you perform
the following steps then the trigger
is applied to the artboard:

1. Select a trigger
2. Click the style segment on the breadcrumb
3. Click the template segment on the breadcrumb
4. re-select the trigger

My post on the expression forums:

http://social.expression.microsoft.com/Forums/en-US/blend/thread/0f6a1422-86e5-4a2e-ad72-1f273f8671dc?prof=required