Xamarin Forms build error - StaticResource not found for key
10,042
The x:Key
attribute must have the first letter in uppercase.
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:Styles"
x:Class="Styles.MainPage">
<ContentPage.Resources>
<ResourceDictionary>
<Style x:Key="buttonStyle" TargetType="Button">
<Setter Property="HorizontalOptions" Value="Center"/>
<Setter Property="VerticalOptions" Value="Center" />
<Setter Property="TextColor" Value="Red"/>
<Setter Property="FontSize" Value="Small"/>
</Style>
<Style TargetType="Label">
<Setter Property="HorizontalOptions" Value="Center"/>
<Setter Property="VerticalOptions" Value="Center" />
<Setter Property="TextColor" Value="Blue"/>
<Setter Property="FontSize" Value="20"/>
</Style>
<Style x:Key="baseStyle" TargetType="View">
<Setter Property="HorizontalOptions" Value="Center"/>
<Setter Property="VerticalOptions" Value="Center" />
</Style>
<Style x:Key="entryStyle" TargetType="Entry" BasedOn="{StaticResource baseStyle}">
<Setter Property="TextColor" Value="Green"/>
</Style>
</ResourceDictionary>
</ContentPage.Resources>
<ContentPage.Content>
<StackLayout Padding="20">
<Label Text="This is label 1 using implicit style"/>
<Label Text="This is label 2"/>
<Button
Text="Not using the button style"
BorderWidth="2"
HorizontalOptions="Center"
VerticalOptions="Center"
WidthRequest="200"/>
<Button Style="{StaticResource buttonStyle}"
Text="Using explicit style"
BorderWidth="2"
WidthRequest="200"/>
<Entry Style="{StaticResource entryStyle}" Placeholder="This enty uses an inherited style"/>
<Button Style="{StaticResource buttonStyle}"
Text="Using explicit style"
BorderWidth="2"
WidthRequest="200"/>
</StackLayout>
</ContentPage.Content>
</ContentPage>
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Author by
jacDeveloper
Updated on June 04, 2022Comments
-
jacDeveloper about 2 years
I'm just learning XAML and Xamrin. I'm trying to learn how static styles work. Here's my XAML code:
<?xml version="1.0" encoding="utf-8" ?> <ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:local="clr-namespace:Styles" x:Class="Styles.MainPage"> <ContentPage.Resources> <ResourceDictionary> <Style x:key="buttonStyle" TargetType="Button"> <Setter Property="HorizontalOptions" Value="Center"/> <Setter Property="VerticalOptions" Value="Center" /> <Setter Property="TextColor" Value="Red"/> <Setter Property="FontSize" Value="Small"/> </Style> <Style TargetType="Label"> <Setter Property="HorizontalOptions" Value="Center"/> <Setter Property="VerticalOptions" Value="Center" /> <Setter Property="TextColor" Value="Blue"/> <Setter Property="FontSize" Value="20"/> </Style> <Style x:key="baseStyle" TargetType="View"> <Setter Property="HorizontalOptions" Value="Center"/> <Setter Property="VerticalOptions" Value="Center" /> </Style> <Style x:key="entryStyle" TargetType="Entry" BasedOn="{StaticResource baseStyle}"> <Setter Property="TextColor" Value="Green"/> </Style> </ResourceDictionary> </ContentPage.Resources> <ContentPage.Content> <StackLayout Padding="20"> <Label Text="This is label 1 using implicit style"/> <Label Text="This is label 2"/> <Button Text="Not using the button style" BorderWidth="2" HorizontalOptions="Center" VerticalOptions="Center" WidthRequest="200"/> <Button Style="{StaticResource buttonStyle}" Text="Using explicit style" BorderWidth="2" WidthRequest="200"/> <Entry Style="{StaticResource entryStyle}" Placeholder="This enty uses an inherited style"/> <Button Style="{StaticResource buttonStyle}" Text="Using explicit style" BorderWidth="2" WidthRequest="200"/> </StackLayout> </ContentPage.Content> </ContentPage>
Compile works fine, but when running, I get this exception:
[ERROR] FATAL UNHANDLED EXCEPTION: Xamarin.Forms.Xaml.XamlParseException: Position 25:58. StaticResource not found for key baseStyle
I don't understand why I get this error since the style 'key' is already defined on the previous line. Any help is greatly appreciated.