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Editorial Team
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Asked: 2026-06-14T23:53:42+00:00

I have a GridView as my zoomed out view in a SemanticZoom control. This

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I have a GridView as my zoomed out view in a SemanticZoom control. This GridView uses a custom DataTemplateSelector as the ItemTemplateSelector. It shows an item for each content group that my app shows.

The template is different depending on whether the group is empty or not. This works fine on load, but it doesn’t update when a group becomes empty or stops being empty.

I’ve found that the ItemTemplateSelector is only run when the page is first shown. How can I force the DataTemplateSelector get run again.

The WPF questions on this topic all suggest triggers, but these aren’t available in WinRT XAML.

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1 Answer

  1. Editorial Team

    I’ve found an answer to a similar WPF question that answers this in a way that works in WinRT:

    https://stackoverflow.com/a/11327087/31569

    Basically you set the ItemTemplateSelector to null and then set it again. Like this:

    var templateSelector = MyGroupView.ItemTemplateSelector;
MyGroupView.ItemTemplateSelector = null;
MyGroupView.ItemTemplateSelector = templateSelector;

    This works, but happy to be told if there is a better way to do this.

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