关于wpf：具有附加属性的模板绑定

Template Binding with Attached Properties

我的按钮具有标准样式，但是我希望样式的某些部分是可配置的。例如当为按钮触发MouseOver时，出现边框，并且希望边框颜色可配置。

紧随本文之后：http://www.thomaslevesque.com/2011/10/01/wpf-creating-parameterized-styles-with-attached-properties/我认为我可以使用附加属性和TemplateBinding来实现此目的。

我创建了以下附加属性：

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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));
}

我将属性设置如下：

1	<Button Style="{StaticResource RedButton}" local:ThemeProperties.ButtonBorderColour="#B20000"/>

我的风格如下所示：

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<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>

关键线在哪里

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据我所知，这应该起作用，但是在运行过程中，在上面的行中出现以下错误：

Cannot convert the value in attribute 'Value' to object of type ''.
Error at object 'System.Windows.Setter' in markup file

我在这里做错了什么吗？我是WPF的新手，无法弄清楚出了什么问题，因为附加属性的Type是Brush，这是我期望Border的BorderBrush属性所需要的。

我认为TemplateBinding是在编译时评估的，因此您不能在Setter中动态设置TemplateBinding，请尝试使用Binding(请参见下文)。

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希望这可以帮助。