How to use a struct value as dynamicresource?

Question

my app.xaml:

<Application x:Class="jngyy2024.App"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:JNGDataTypes.Music;assembly=JNGDataTypes"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:sysw="clr-namespace:System.Windows;assembly=PresentationFramework"
StartupUri="MainWindow.xaml">
         <Application.Resources>
                  <ResourceDictionary>
                      <ResourceDictionary.MergedDictionaries> 
                          <sysw:Thickness x:Key="AppBorderThickness">3</sysw:Thickness>      
                  </ResourceDictionary>     
         </Application.Resources> 
</Application>

I use it like this:

<jc:JCRevealButto BorderThickness="{DynamicResource AppBorderThickness}"></jc:JCRevealButton>

App app = App.Current as App;
app.Resources["AppBorderThickness"] = new Thickness(1);

But it didn't work, I seek it on internet , it is said that thickness is a struct-type value and dynamicresource can only be used on the ref-able-value, how can I fix it? Thanks for your answers!

Answer 1

Hi,@尼龟 杰. Welcome Microsoft Q&A.

You could try the solution below to see if it is what you want. If so, you can refer to it and modify your code.

app.xaml:

<Application x:Class="WpfApp2.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:WpfApp2"
              xmlns:sys="clr-namespace:System;assembly=mscorlib"
             xmlns:sysw="clr-namespace:System.Windows;assembly=PresentationFramework"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
       
                <ResourceDictionary>
                    <ResourceDictionary.MergedDictionaries>
                        <ResourceDictionary>
                            <sysw:Thickness x:Key="AppBorderThickness">3</sysw:Thickness>
                        </ResourceDictionary>
                    </ResourceDictionary.MergedDictionaries>
                </ResourceDictionary>
                    
      
    </Application.Resources>
</Application>

MainWindow.xaml:

<Window.Resources>
        <Style x:Key="btn" TargetType="{x:Type Button}">
            <Setter Property="BorderThickness" Value="{DynamicResource AppBorderThickness}" />
        </Style>

    </Window.Resources>
    <Grid>
      
        <Button Style="{StaticResource btn}" Width="200" Height="100" Content="My Button"/>

    </Grid>

MainWindow.xaml.cs:

 public MainWindow()
        {
            InitializeComponent();
            App app = App.Current as App;
            app.Resources["AppBorderThickness"] = new Thickness(7);

        }

The result:

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