WPF:扩展主题的样式 - StackOverflowException [英] WPF : Extend Theme's style - StackOverflowException

问题描述

除了 Royale 主题样式之外，我希望每个按钮都有 5 点边距.

I want every button to have 5 points margin, in addition to Royale theme style.

Window1.xaml:

Window1.xaml:

<Window x:Class="_styles.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
  <Window.Resources>
    <ResourceDictionary>
      <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/PresentationFramework.Royale;component/themes/royale.normalcolor.xaml" />
      </ResourceDictionary.MergedDictionaries>
      <Style TargetType="{x:Type Button}" BasedOn="{StaticResource {x:Type Button}}">
        <Setter Property="Margin" Value="5"/>
      </Style>
    </ResourceDictionary>
  </Window.Resources>
  <StackPanel>
    <Button Content="Button A"/>
    <Button Content="Button B"/>
  </StackPanel>
</Window>

它编译但我得到:

PresentationFramework.dll 中发生类型为System.StackOverflowException"的未处理异常

An unhandled exception of type 'System.StackOverflowException' occurred in PresentationFramework.dll

public Window1() {
    InitializeComponent(); // <-- getting exception here
}

没有异常详情是因为:

{无法计算表达式，因为当前线程处于堆栈溢出状态.}

{Cannot evaluate expression because the current thread is in a stack overflow state.}

推荐答案

这似乎是您的样式与 PresentationFramework.Royale 中定义的样式之间的循环引用.一种解决方法是将资源置于不同级别:

This seems to be a circular reference between your style and the one defined in PresentationFramework.Royale. A workaroud would be to place resources at different levels:

<Window x:Class="_styles.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    Title="Window1" Height="300" Width="300">
<Window.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="/PresentationFramework.Royale;component/themes/royale.normalcolor.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Window.Resources>
<StackPanel>
    <StackPanel.Resources>
        <Style TargetType="{x:Type Button}" BasedOn="{StaticResource {x:Type Button}}">
            <Setter Property="Margin" Value="5"/>
        </Style>
    </StackPanel.Resources>
    <Button Content="Button A"/>
</StackPanel>
</Window>

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