样式化 WPF - Material 在代码中设计 GroupBox

Question

经过大量搜索/反复试验后，我必须求助于社区对此问题的帮助。我正在使用 MaterialDesign 框架开发 WPF 应用程序，自定义颜色在我的 App.xaml 中定义，如下所示：

<Application.Resources>
        <ResourceDictionary>
            <!-- primary -->
            <SolidColorBrush x:Key="PrimaryHueLightBrush" Color="#033059"/><!--5c5b5e-->
            <SolidColorBrush x:Key="PrimaryHueLightForegroundBrush" Color="#FFFFFF"/>
            <SolidColorBrush x:Key="PrimaryHueMidBrush" Color="DarkRed"/> <!--6134d9-->
            <SolidColorBrush x:Key="PrimaryHueMidForegroundBrush" Color="#FFFFFF"/>
            <SolidColorBrush x:Key="PrimaryHueDarkBrush" Color="#48545e"/> <!--4D1DCF-->
            <SolidColorBrush x:Key="PrimaryHueDarkForegroundBrush" Color="#FFFFFF"/>
            <!-- accent -->
            <SolidColorBrush x:Key="SecondaryAccentBrush" Color="#1266a7"/> <!--5c5b5e-->
            <SolidColorBrush x:Key="SecondaryAccentForegroundBrush" Color="#FFFFFF"/>

            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
                <!--<ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.Red.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.Blue.xaml" />-->
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Button.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.GroupBox.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.DatePicker.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Calendar.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.CheckBox.xaml" />


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

需要以编程方式（在代码隐藏中）呈现某些控件，其中一个控件是 GroupBox。此 GroupBox 呈现得很好，但使用 PrimaryHueMidBrush 中定义的颜色设置样式。我想要完成的是将另一个 (SecondaryAccentBrush) 分配给 GroupBox。在 XAML 中，可以像下面这样实现：

<Border BorderBrush="{DynamicResource SecondaryAccentBrush}" BorderThickness="2" Padding="10" Height="50" Width="300">
        <TextBlock Text="Material Design Test" />
</Border>

var childDef = new GroupBox()
            {
                Header = "Deficiencies",
                HorizontalAlignment = HorizontalAlignment.Right,
                VerticalAlignment = VerticalAlignment.Top,


                //Background = new SolidColorBrush(Colors.Red)
                //Foreground = new SolidColorBrush(Colors.Red),
                //OverridesDefaultStyle = true
                //Background = Brushes.DarkRed,
                //BorderThickness = new Thickness(1),
                //BorderBrush = new SolidColorBrush(Colors.Red)
            };

            //childDef.SetResourceReference(Control.BorderBrushProperty, "PrimaryHueDarkBrush");
            //childDef.SetResourceReference(Control., materialDesign:ColorZoneAssist.Mode="Accent");

问题是，我不知道如何通过代码实现这一点。我尝试的任何事情似乎都不起作用。我不知道如何覆盖 BorderBrushProperty。

如有任何帮助，我们将不胜感激！

提前致谢

Answer 1

您可以在后面的代码中使用 Application.Current.Resources：

childDef.BorderBrush = (Brush) Application.Current.Resources["SecondaryAccentBrush"];

因此，例如访问 "SecondaryAccentBrush" 在 App.xaml 中定义的画笔：

<Application.Resources>
     <ResourceDictionary>
         <SolidColorBrush x:Key="SecondaryAccentBrush" Color="#1266a7"/>
    </ResourceDictionary>
</Application.Resources>

您可以执行以下操作：

        var grp = new GroupBox
        {
            BorderBrush = (Brush) Application.Current.Resources["SecondaryAccentBrush"],
            Header = "test",
            Width = 100,
            Height = 100,
            HorizontalAlignment = HorizontalAlignment.Center,
            VerticalAlignment = VerticalAlignment.Center
        };

        this.MyGrid.Children.Add(grp);

结果如下：

Answer 2

为了扩展 Mikael 的答案，当你不使用 Material 设计时它工作得很好，我能够解决这个问题：

childDef.Style = Application.Current.FindResource("MaterialDesignGroupBox") as Style;

我仍在寻找在代码隐藏中应用 MaterialDesign:ColorZoneAssist.Mode="Accent" 的方法，因为这似乎是除了主要Material应用程序的设计颜色。

样式化 WPF - Material 在代码中设计 GroupBox

Styling WPF - Material Design GroupBox in Code

c#

wpf

xaml

groupbox

material-design-in-xaml