Setting up WPF treeview triggers to show different images on expand

Question

I have a wpf tree view that displays nodes of various types with corresponding images such as folder images. Initially, the tree and its nodes with corresponding images display

Answer 1

This question might be relevant.

As in my answer to the question I linked I would do the triggering in the image via RelativeSource binding, you can refactor that into a style so you do not have all that redundant code.

Possibly you could work with DynamicResources to provide the two images to every Image-control, or you could sub-class Image or create a UserControl which provides properties.

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The DynamicResource method: