WinRT XAML Applying Style Inside DataTemplate - xaml

Question

I have some styles that are being included in a page with a resource reference.
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="MyStyles.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
I have named styles for TextBlock, Button, etc. When using them, everything works fine.
When I try using them inside of a DataTemplate of an ItemsControl, they don't get applied.
<ItemsControl>
<ItemsControl.ItemsPanel>
<StackPanel Orientation="Horizontal" />
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="blah" Style="{StaticResource MyTextBlockStyle}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
How can I get the named styles that are included from another file to work inside my DataTemplate like it does everywhere else on the page?

Answer 1

Instead of including the styles in a particular page's XAML, include them in App.xaml. Here's how I add them
<Application x:Class="MyApp.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:MyApp">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Resources/Resources.xaml"></ResourceDictionary>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
I use style defined in Resources.xaml in DataTemplate all the time.

Answer 2

Instead of defining manually you can use Blend to through design panel.
When you right click to your
Gridview > Edit Additional Templates > Edit Generated Items
you can edit your content. Then you can select any of your item and define their style on design pane like below
If you don't see your button, textblock style in right click menu you can check this post to make them reusable
Style only works for the first occurence when outside Grid.Resources?
Hope this will be helpful.