jwmsft
commented
3 years ago Hi, thanks for contacting us regarding these issues. Hopefully I can provide some clarification.
Why are resources not used in this page?
Implicit styles do work as intended to apply a style based on control type; the issue here is the scope of the Style resource. In order for this implicit style to work inside of the DataTemplate, the Style resource also needs to be inside of the DataTemplate, like this:
<ListView.ItemTemplate>
<DataTemplate x:DataType="x:String">
<Grid>
<Grid.Resources>
<Style TargetType="TextBlock">
<Setter Property="Foreground" Value="Red" />
</Style>
</Grid.Resources>
<TextBlock Text="{x:Bind}"/>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>How can I set page background color using ResourceDictionary?
When Visual Studio creates a page, it actually creates a new class that's derived from the Page class. This is seen most clearly in the declaration in the code page. For example, in MainPage.xaml.cs, you can see that the new class is MainPage and it's derived from Page.
public sealed partial class MainPage : PageIn UWP, implicit styles are not applied to derived classes, only to the type specified in the Style. To implicitly apply a Style to MainPage, the TargetType has to be MainPage, like this:
<Style TargetType="local:MainPage">
<Setter Property="Background" Value="Red" />
</Style>However, as you noticed, the Visual Studio preview handles this differently, and applies the style when TargetType is Page, but not when it's MainPage. I would guess that this is a bug in Visual Studio.
SetTrend
mdtauk
groovykool
UWP documentation claims that styles can be applied to control types as a whole, by providing a
TargetTypeattribute.For instance:
However, that doesn't work.
I created two repositories to provide a reproducable project, demonstrating this issue with the UWP resource handling system:
To verify this issue, I posted two corresponding questions at StackOverflow:
The responses at StackOverflow make me believe that either the Microsoft documentation or the implementation of UWP is faulty.
Before I report this issue to the Microsoft UWP product team, I'll jump off by reporting this issue to the Microsoft UWP documentation team.
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Document Details
⚠ Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.