When I use the default templates in Windows 8 Store apps for an item grid, I get some nifty transitions when the source of the collection is set. How can I remove these transiti
You can remove them by overriding the ItemContainerTransitions. If you add the following style to the page resources:-
<Page.Resources>
<Style x:Key="NoAnimations" TargetType="GridView">
<Setter Property="ItemContainerTransitions">
<Setter.Value>
<TransitionCollection>
</TransitionCollection>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
Then set the style of your gridview to NoAnimations:
<GridView Grid.Row="1" Style="{StaticResource NoAnimations}">
That should take care of it for you. If you don't want to loose all of the animations then you can add some of them back - here is a list of the default animations on the gridview:-
<TransitionCollection>
<AddDeleteThemeTransition/>
<ContentThemeTransition/>
<ReorderThemeTransition/>
<EntranceThemeTransition IsStaggeringEnabled="False"/>
</TransitionCollection>