UserControl as Content for HeaderedContentControl.HeaderTemplate

I have a UserControl that I have successfully been using as a header for presentations that involve a list which can be headered, using the xaml below:

<DockPanel >
    <uc:ListSubjectHeader Subject="{Binding DisplayName}" 
                          AddNewItemCommand="{Binding AddCommand}"
                           ImageSource="..."  />

<!-- other controls -->


I would like to use this same control in another presentation where it would be the content for the header in a HeaderedContentControl, and came up with this xaml to do that:

<HeaderedContentControl Content="{Binding Path=DetailViewDepartment}" >
        <DataTemplate  DataType="{x:Type vm:DepartmentSelectionViewModel}">
            <uc:ListSubjectHeader Subject="{Binding DisplayName}" ...  />


The visual elements show up the way I want them to, but data does not. I should note that I am using the same view model (vm:DepartmentSelectionViewModel) in a different control's DataTemplate in the same presentation, which I asked as a different question here. If you know the answer to this one you likely know the answer to that one too.

How can I fix this?

Cheers, Berryl


The HeaderTemplate applies to the object in the Header property, not Content. Content uses the ContentTemplate, just like in the normal ContentControl.

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