NavigationViewItemSelector line does not appear

[rcohn]

Hello -

In a WinUI3 desktop app I'm working on, I've been trying to get a separator line to show up in a NavigationView. If I create the NV statically by explicitly adding NavigationViewItems into NavigationView, while inserting a NavigationViewItemSelector after one of the items, the selector line will show up.

However, if the NavigationViewItems are created dynamically through an ObserverCollection, I have not found a way to get the separator line to show up. The only sample code I've found in WinUI-Gallery where a NavigationViewItemSeparator is inserted into a NavigationViewItem list are for explicit (non-observer) lists.

I suspect that what I want to do can only be accomplished by incorporating the NavigationViewItemSeparator into a NavigationViewItem DataTemplate. However, I may be overcomplicating things and just don't know if there is a more straightforward way to get the separator to appear.

Would appreciate any pointers on this. Please let me know if I need to supply any more info to answer the question.

Thanks very much.
Robert Cohn

[marcelwgn]

I think that your proposed solution would be viable, my question would be how you decide when to insert a separator and when not to insert one. If your collection contains "separator" items that have no data but only serve as separation, then a DataTemplateSelector would make this quite easy I think.

[rcohn]

Hi @chingucoding - I did find some references that could help with the implementation. Here are a couple that look useful:
https://stackoverflow.com/questions/61717820/uwp-navigationview-with-two-different-sources
https://github.com/microsoft/microsoft-ui-xaml/issues/2485

As to when to insert the separator, that would be done by logic that is used to build the list.

Appreciate the reply.
Best regards.

[marcelwgn]

Great to hear that you found some references that help. Is there anything else I can help you with or is your question answered?

[rcohn]

Thank you for your replies. At the moment, my team decided to not use the separator so I'm deferring trying out the above implementation. But if they decide otherwise, I know how to proceed.

To answer your question, I think my question has been answered as well as can be expected.

Best regards.