WPF 在运行时设置静态资源

Question

如何在运行时使用静态资源设置按钮的样式？ xaml 看起来像这样：

<Button  Grid.Column="0" Grid.Row="2"  VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Margin="1,0,1,0" 
                     Background="{StaticResource OrangeGradient}"  FontFamily="Lucida Sans"  BorderBrush="Black" >

Background="{StaticResource OrangeGradient}" 在运行时在 c# 中会是什么样子？

我的资源字典，Resources/Styles.xaml：

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:local="clr-namespace:myProj">

<LinearGradientBrush  x:Key="OrangeGradient" EndPoint="0.5,1" StartPoint="0.5,0">
        <LinearGradientBrush.RelativeTransform>
            <TransformGroup>
                <ScaleTransform CenterY="0.5" CenterX="0.5"/>
                <SkewTransform CenterY="0.5" CenterX="0.5"/>
                <RotateTransform Angle="270" CenterY="0.5" CenterX="0.5"/>
                <TranslateTransform/>
            </TransformGroup>
        </LinearGradientBrush.RelativeTransform>
        <GradientStop Color="#FFE08A19" Offset="0"/>
        <GradientStop Color="#FFF5CA86" Offset="1"/>
    </LinearGradientBrush>

App.xaml：

<Application x:Class="myProj.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:myProj"
             StartupUri="MainWindow.xaml">

    <Application.Resources>

        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Resources/Styles.xaml"   />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>

    </Application.Resources>

</Application>

Answer 1

将Background设置为静态资源的类比，但在运行时只是：

yourButton.Background = (Brush)this.Resources["OrangeGradient"];

其中Resources 是带有目标画笔的ResourceDictionary，例如您的Window 或UserControl 的根ResourceDictionary。