[英]WPF: Cant find correct BorderBrush after setting Style
我有一个按钮,我也应用了样式。 应用样式后,我进行了一个测试,检查按钮的BorderBrush以确保正确应用了样式。 该测试始终失败,因为BorderBrush从未在Buttons属性中更新。
有没有办法让我显示实际的BorderBrush? 我所能得到的只是默认的BorderBrush,而不是应用的样式值。
我使用的样式是这样的:
<Style x:Key="ActiveModuleBtnStyleOn" TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Grid>
<Border Margin="0"
BorderThickness="3"
BorderBrush="Green"
Background="White"
VerticalAlignment="Stretch"
CornerRadius="4"
HorizontalAlignment="Stretch">
<Border.Effect>
<DropShadowEffect BlurRadius="10" Color="Black" Direction="325" Opacity=".5" RenderingBias="Quality" ShadowDepth="5" />
</Border.Effect>
</Border>
<TextBlock Margin="2" Text="{TemplateBinding Content}" TextWrapping="Wrap" TextAlignment="Center" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="IsEnabled" Value="true"/>
</Style>
然后我应用如下样式:
if(var1 == 1)
TopologyNvTxBtn.Style = this.FindResource("ActiveModuleBtnStyleOn") as Style;
else
TopologyNvTxBtn.Style = this.FindResource("ActiveModuleBtnStyleOff") as Style;
在我的测试应用中,我想检查已应用的样式。 两种样式之间的区别是边框笔刷。 我想做这样的事情:
if(TopologyNvTxBtn.BorderBrush == Brushes.Green)
return PASS;
但是BorderBrush永远不会改变(例如,在监视窗口中,它与默认按钮样式BorderBrush保持相同),但是它的确可以正确应用,因为它在GUI中变为绿色。
如何在测试中访问此属性?
提前谢谢了
Button的BorderBrush属性未绑定到模板中的任何内容。 您需要在控制模板中执行以下操作:
<Style x:Key="ActiveModuleBtnStyleOn" TargetType="Button">
<Setter Property="BorderBrush" Value="Green" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Grid>
<Border Margin="0"
BorderThickness="3"
BorderBrush="{TemplateBinding BorderBrush}"
Background="White"
VerticalAlignment="Stretch"
CornerRadius="4"
HorizontalAlignment="Stretch">
<Border.Effect>
<DropShadowEffect BlurRadius="10" Color="Black" Direction="325" Opacity=".5" RenderingBias="Quality" ShadowDepth="5" />
</Border.Effect>
</Border>
<TextBlock Margin="2" Text="{TemplateBinding Content}" TextWrapping="Wrap" TextAlignment="Center" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="IsEnabled" Value="true"/>
</Style>
请注意,现在如何将BorderBrush绑定到Button的BorderBrush属性。 然后,您可以在样式中设置BorderBrush,并且应该能够以这种方式访问它:
if(TopologyNvTxBtn.BorderBrush == Brushes.Green)
让我知道是否可行。
干杯,埃里克
如上所述, Border
是Button
ControlTemplate
一部分。 我刚刚启动Blend,并获得了“ Factory”模板的副本。 有了它,您几乎可以完成所有事情(假设您了解样式)。
<Style x:Key="FocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="2" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<SolidColorBrush x:Key="Button.Static.Background" Color="#FFDDDDDD"/>
<SolidColorBrush x:Key="Button.Static.Border" Color="#FF707070"/>
<SolidColorBrush x:Key="Button.MouseOver.Background" Color="#FFBEE6FD"/>
<SolidColorBrush x:Key="Button.MouseOver.Border" Color="#FF3C7FB1"/>
<SolidColorBrush x:Key="Button.Pressed.Background" Color="#FFC4E5F6"/>
<SolidColorBrush x:Key="Button.Pressed.Border" Color="#FF2C628B"/>
<SolidColorBrush x:Key="Button.Disabled.Background" Color="#FFF4F4F4"/>
<SolidColorBrush x:Key="Button.Disabled.Border" Color="#FFADB2B5"/>
<SolidColorBrush x:Key="Button.Disabled.Foreground" Color="#FF838383"/>
<Style x:Key="ButtonStyle1" TargetType="{x:Type Button}">
<Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}"/>
<Setter Property="Background" Value="{StaticResource Button.Static.Background}"/>
<Setter Property="BorderBrush" Value="{StaticResource Button.Static.Border}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Padding" Value="1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border x:Name="border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
<ContentPresenter x:Name="contentPresenter" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsDefaulted" Value="true">
<Setter Property="BorderBrush" TargetName="border" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource Button.MouseOver.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource Button.MouseOver.Border}"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource Button.Pressed.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource Button.Pressed.Border}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="border" Value="{StaticResource Button.Disabled.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource Button.Disabled.Border}"/>
<Setter Property="TextElement.Foreground" TargetName="contentPresenter" Value="{StaticResource Button.Disabled.Foreground}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
MSDN提供了有关Style
和Templates
的很好的入门教程。 此外,您可以在网上找到大量文章!
Button
本身几乎是这样的:
<Border
x:Name="border"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
SnapsToDevicePixels="true">
<ContentPresenter
x:Name="contentPresenter"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
Margin="{TemplateBinding Padding}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Focusable="False"
RecognizesAccessKey="True"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</Border>
因此,您要寻找的是Triggers
,因此您必须根据需要添加和更改这些标签:
<ControlTemplate.Triggers>
<Trigger Property="IsDefaulted" Value="true">
<Setter Property="BorderBrush" TargetName="border" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource Button.MouseOver.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource Button.MouseOver.Border}"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Background" TargetName="border" Value="{StaticResource Button.Pressed.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource Button.Pressed.Border}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="border" Value="{StaticResource Button.Disabled.Background}"/>
<Setter Property="BorderBrush" TargetName="border" Value="{StaticResource Button.Disabled.Border}"/>
<Setter Property="TextElement.Foreground" TargetName="contentPresenter" Value="{StaticResource Button.Disabled.Foreground}"/>
</Trigger>
</ControlTemplate.Triggers>
注意事项: TargetName
和每个<Trigger Property="IsDefaulted" Value="true">
都一样! 祝好运!
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