我正在尝试对CheckBox
应用Style
。问题是:Style
在设计时应用,但不在运行时应用。只有当我将Style
放在 MainWindow.xaml 中时,它才有效。
我在资源字典中有一个Style
。这是,在 App.xaml 中:
<Application.Resources>
<ResourceDictionary>
<Style x:Key="ToggleButton" TargetType="{x:Type CheckBox}">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}"/>
<Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type CheckBox}">
<ControlTemplate.Resources>
<Storyboard x:Key="OnChecking">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="slider" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)">
<SplineDoubleKeyFrame KeyTime="00:00:00.3000000" Value="25"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="OnUnchecking">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="slider" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)">
<SplineDoubleKeyFrame KeyTime="00:00:00.3000000" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<ThicknessAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="slider" Storyboard.TargetProperty="(FrameworkElement.Margin)">
<SplineThicknessKeyFrame KeyTime="00:00:00.3000000" Value="1,1,1,1"/>
</ThicknessAnimationUsingKeyFrames>
</Storyboard>
</ControlTemplate.Resources>
<DockPanel x:Name="dockPanel">
<ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" ContentTemplate="{TemplateBinding ContentTemplate}" RecognizesAccessKey="True" VerticalAlignment="Center"/>
<Grid Margin="5,5,0,5" Width="50" Background="#FFC0CCD9">
<TextBlock Text="ON" TextWrapping="Wrap" FontWeight="Bold" FontSize="12" HorizontalAlignment="Right" Margin="0,0,3,0"/>
<TextBlock HorizontalAlignment="Left" Margin="2,0,0,0" FontSize="12" FontWeight="Bold" Text="OFF" TextWrapping="Wrap"/>
<Border HorizontalAlignment="Left" x:Name="slider" Width="23" BorderThickness="1,1,1,1" CornerRadius="3,3,3,3" RenderTransformOrigin="0.5,0.5" Margin="1,1,1,1">
<Border.RenderTransform>
<TransformGroup>
<ScaleTransform ScaleX="1" ScaleY="1"/>
<SkewTransform AngleX="0" AngleY="0"/>
<RotateTransform Angle="0"/>
<TranslateTransform X="0" Y="0"/>
</TransformGroup>
</Border.RenderTransform>
<Border.BorderBrush>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFFFFFFF" Offset="0"/>
<GradientStop Color="#FF4490FF" Offset="1"/>
</LinearGradientBrush>
</Border.BorderBrush>
<Border.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FF8AB4FF" Offset="1"/>
<GradientStop Color="#FFD1E2FF" Offset="0"/>
</LinearGradientBrush>
</Border.Background>
</Border>
</Grid>
</DockPanel>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Trigger.ExitActions>
<BeginStoryboard Storyboard="{StaticResource OnUnchecking}" x:Name="OnUnchecking_BeginStoryboard"/>
</Trigger.ExitActions>
<Trigger.EnterActions>
<BeginStoryboard Storyboard="{StaticResource OnChecking}" x:Name="OnChecking_BeginStoryboard"/>
</Trigger.EnterActions>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
</Application.Resources>
这就是我尝试应用样式的方式:
<CheckBox HorizontalAlignment="Center" Style="{DynamicResource ToggleButton}" VerticalAlignment="Center" Content="Test"/>
更新:我发现当我的启动位置不是应用程序,而是我创建的类程序.cs时,Style
在运行时不适用。
为复选框命名,然后尝试动态应用样式。
<CheckBox x:Name="chckbx1" HorizontalAlignment="Center" Style="{DynamicResource ToggleButton}" VerticalAlignment="Center" Content="Test"/>
在代码隐藏中:
chckbx1.Style = (Style) FindResource("ToggleButton");
我发现当我的启动位置不是应用程序而是我创建的类时,样式在运行时不适用.cs。
我已经看到当样式TargetType
是基类而不是特定的派生类时,就会发生这种情况。在这种情况下,设计师向我展示了按预期应用的样式,但在运行时并非如此。
我特别使用了VS2015设计器。
我最终通过遵循将样式应用于 WPF 中的所有派生类和如何使 WPF 样式可继承到派生类?中的建议解决了这个问题。