我有一个标准样式的按钮,但我希望样式的某些部分是可配置的。例如MouseOver触发按钮时我出现边框,我希望边框颜色可以配置。模板绑定与附加属性
以下这篇文章:http://www.thomaslevesque.com/2011/10/01/wpf-creating-parameterized-styles-with-attached-properties/我想我可以使用附加的属性和TemplateBinding来实现这一点。
我创建了以下附加属性:
public static class ThemeProperties
{
public static Brush GetButtonBorderColour(DependencyObject obj)
{
return (Brush)obj.GetValue(ButtonBorderColourProperty);
}
public static void SetButtonBorderColour(DependencyObject obj, Brush value)
{
obj.SetValue(ButtonBorderColourProperty, value);
}
public static readonly DependencyProperty ButtonBorderColourProperty =
DependencyProperty.RegisterAttached(
"ButtonBorderColour",
typeof(Brush),
typeof(ThemeProperties),
new FrameworkPropertyMetadata(Brushes.Black, FrameworkPropertyMetadataOptions.Inherits));
}
我设置像这样的属性:
<Button Style="{StaticResource RedButton}" local:ThemeProperties.ButtonBorderColour="#B20000"/>
而且我的风格是这样的:
<Window.Resources>
<Style x:Key="RedButton" TargetType="Button">
<Setter Property="OverridesDefaultStyle" Value="True"/>
<Setter Property="Margin" Value="2"/>
<Setter Property="FontFamily" Value="Tahoma"/>
<Setter Property="FontSize" Value="11px"/>
<Setter Property="FontWeight" Value="Bold"/>
<Setter Property="Foreground" Value="White"/>
<Setter Property="MinHeight" Value="25" />
<Setter Property="FocusVisualStyle" Value="{StaticResource MyFocusVisual}" />
<Setter Property="Background" >
<Setter.Value>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,1" >
<GradientStop Color="#FECCBF" Offset="0.2"/>
<GradientStop Color="Red" Offset="0.85"/>
<GradientStop Color="#FECCBF" Offset="1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border Name="border" BorderThickness="1" Padding="4,2" BorderBrush="Transparent" CornerRadius="3" Background="{TemplateBinding Background}">
<Grid >
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" Name="content"/>
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="border" Property="BorderBrush" Value="{TemplateBinding local:ThemeProperties.ButtonBorderColour}" />
<Setter Property="Foreground" Value="#B20000" />
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Background" >
<Setter.Value>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,1" >
<GradientStop Color="#FECCBF" Offset="0.35"/>
<GradientStop Color="Red" Offset="0.95"/>
<GradientStop Color="#FECCBF" Offset="1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter TargetName="content" Property="RenderTransform" >
<Setter.Value>
<TranslateTransform Y="1.0" />
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="IsDefaulted" Value="True">
<Setter TargetName="border" Property="BorderBrush" Value="#B20000" />
</Trigger>
<Trigger Property="IsFocused" Value="True">
<Setter TargetName="border" Property="BorderBrush" Value="#B20000" />
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter TargetName="border" Property="Opacity" Value="0.7" />
<Setter Property="Foreground" Value="Gray" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
凡重点线是
<Trigger Property="IsMouseOver" Value="True">
<Setter TargetName="border" Property="BorderBrush" Value="{TemplateBinding local:ThemeProperties.ButtonBorderColour}" />
<Setter Property="Foreground" Value="#B20000" />
</Trigger>
至于我可以看到这个应该工作,但我在运行时获得上述线以下错误:
“值”不能转换价值属性类型的'对象。 标记文件中对象'System.Windows.Setter'的错误
我在这里做了一些不正确的事吗?我是WPF全新的,并且无法确定发生了什么问题,因为附加属性的类型是Brush,这是我期望Border的BorderBrush属性需要的。
嘿我编辑了我的答案,它现在应该工作。这是一个语法错误,对此感到遗憾。 – 2012-02-10 22:34:19
谢谢小川,那已经很完美了。我还可以看到我的代码和链接网页上的示例之间的区别,因为示例没有在以前不赞赏的setter中使用TemplateBinding。再次感谢! – thudbutt 2012-02-13 10:14:08
我不明白为什么我的相同案件在设计时不起作用(但它在运行时) - http://stackoverflow.com/questions/41614676/binding-style-property-value-to-an-attached -property-causes-design-time-only-e/41617979 – 2017-01-13 09:56:52