覆盖App.xaml中的标准主题

Question

我使用标准的WPF主题Aero.NormalColor.xaml.而且效果很好.但是对于整个应用程序,我想将文本框的前景颜色覆盖为红色.

我的第一次尝试是

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary
                Source="/PresentationFramework.Aero, Version=3.0.0.0,
               Culture=neutral, PublicKeyToken=31bf3856ad364e35,
               ProcessorArchitecture=MSIL;component/themes/Aero.NormalColor.xaml">
            </ResourceDictionary>
        </ResourceDictionary.MergedDictionaries>
        <Style TargetType="TextBox">
            <Setter Property="Foreground" Value="Red" />
        </Style>
    </ResourceDictionary>
</Application.Resources>

嗯......文本框的所有前景色都变成了红色.但是,所有文本框都会丢失主题样式.是的,我知道我应该添加"BasedOn".我的第二次尝试是在样式标记中添加"BasedOn".

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary
                Source="/PresentationFramework.Aero, Version=3.0.0.0,
               Culture=neutral, PublicKeyToken=31bf3856ad364e35,
               ProcessorArchitecture=MSIL;component/themes/Aero.NormalColor.xaml">
            </ResourceDictionary>
        </ResourceDictionary.MergedDictionaries>
        <Style TargetType="TextBox" BasedOn="{StaticResource {x:Type TextBox}}">
            <Setter Property="Foreground" Value="Red" />
        </Style>
    </ResourceDictionary>
</Application.Resources>

抛出异常.与此WPF相同:扩展主题的样式 - StackOverflowException

最终,我实现了我的目标.

在App.xaml中

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary
                Source="/PresentationFramework.Aero, Version=3.0.0.0,
               Culture=neutral, PublicKeyToken=31bf3856ad364e35,
               ProcessorArchitecture=MSIL;component/themes/Aero.NormalColor.xaml">
            </ResourceDictionary>
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Application.Resources>

在所有窗口和用户控件中,我必须明确设置

<UserControl.Resources>
    <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}">
        <Setter Property="Foreground" Value="Red" />
    </Style>
</UserControl.Resources>

上面的代码是多次复制和粘贴,并且不易维护.有人知道如何通过将前景设置为红色一次来实现我的目标吗？

Answer 1

我认为您可以将 a 添加Style到 aResourceDictionary并将其与 Aero 主题合并，如下所示：

<Application.Resources>
  <ResourceDictionary>
    <ResourceDictionary.MergedDictionaries>
      <ResourceDictionary Source="/PresentationFramework.Aero, Version=3.0.0.0,
        Culture=neutral, PublicKeyToken=31bf3856ad364e35,
        ProcessorArchitecture=MSIL;component/themes/Aero.NormalColor.xaml">
      </ResourceDictionary>

      <!-- Adding the style to a resource dictionary -->
      <ResourceDictionary>
        <Style TargetType="TextBox" BasedOn="{StaticResource {x:Type TextBox}}">
          <Setter Property="Foreground" Value="Red" />
        </Style>
      </ResourceDictionary>

    </ResourceDictionary.MergedDictionaries>
  </ResourceDictionary>
</Application.Resources>

这应该为所有文本框提供红色前景色，而不必在每个窗口和用户控件上显式指定。