To AutoHide a ToolWindow causes contained PropertyGrid ComboBox to lose values.

Hi Chris,

Are you by chance using a {Binding} in your PropertyGrid?  It could be that the DataContext is lost as the tool window moves outside of the main window and into auto-hide?  That issue is generally fixed by using ElementName in your Binding instead of inheriting down the DataContext.

Yep, I'm using DataContext and simple bindings as described. Is ElementName the only way forward? Not even Source will work? ElementName will require me to do a significant redesign of how data should propagate.

Well the problem is that DataContexts normally inherit down the element tree.  As soon as you pull a tool window out into auto-hide or a floating window, that inheritance gets broken.  By using ElementName references, it retains the references.  You could probably even just bind each ToolWindow's DataContext property to the DockSite's DataContext and that would likely work and allow you to keep your child control bindings the same.

For example:

<docking:ToolWindow DataContext="{Binding ElementName=dockSite, Path=DataContext}">...

Awesome, many thanks. I made that edit and the problem is gone. I had thought you intended me to expose the enums in a new XAML element.