NavigationBar and Expander template

Hi Arthur,

If you are a WPF Studio customer then you can download the default Styles, which show the default templates, from our site. The following blog post describes this more:

http://blog.actiprosoftware.com/post/2009/06/18/WPF-Studio-20091-customers-can-now-download-default-control-styles.aspx

But to answer your question, our styles for the Expander do not name the ContentPresenter. The native WPF Style give the ContentPresenter a name simply because they need to reference that element in one or more Triggers (which show or hide the ContentPresenter). Our Styles do not need to name the ContentPresenter, because we do not need to reference it from any triggers. Our Styles do, however, reference an instance of AnimatedExpanderDecorator which is used to show or hide the ContentPresenter.

Generally, you should not access elements by name unless they are explicitly named parts (i.e. they are prefixed with "PART_"). If you can explain better what you are trying to accomplish, we may be able to find an alternative solution.

If you absolutely need access to the ContentPresenter, you can modify our Styles and use those in your application.

I'm trying to create an accordion effect for the Expanders in the pane from my NavigationBar as I don't know how many Expanders users will add in that very pane.
Zero (all collapsed) or one Expander will be expanded as the space left for the Expanders is as small as it is already.
Basically I'm trying to implement the code from the project found at:

http://www.rooijakkers.net/blog/post/2007/11/WPF-implementation-of-a-basic-Accordion-control.aspx

This works like a charm in the project shown, but not when I try to implement this in the NavigationBar.
The code faults on the aforementioned line in trying to find the template.

If there's a better solution to it, then that's perfectly fine with me.
But at this moment I don't see how I need to adapt the code to get it to work with the NavigationBar.
If you could help me out with this, it would be greatly appreciated!

Hi Arthur,

To get that code working with our Styles, I believe you would just need to use "content" in place of "ExpandSite".

Normally, that type of control would be more "integrated". Such that there'd be a Panel that can arrange the Expanders, where the expanded one gets the remaining space (after arranging children). But the solution you are using should probably work just fine :-)