WPF 从按钮样式覆盖触发器
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WPF Override a trigger from a button style
提问by Ralph
I have below button style in window resources:
我在窗口资源中有以下按钮样式：
<Style x:Key="MyStyle" TargetType="{x:Type Button}">
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="BorderThickness" Value="0 0 0 3"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="BorderBrush" Value="Orange" />
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="BorderBrush" Value="Red" />
</Trigger>
</Style.Triggers>
</Style>
This style is shared by two wpf buttons. But there is a button I want to show a custom color when it is pressed, the color will be green.
此样式由两个 wpf 按钮共享。但是有一个按钮我想在按下时显示自定义颜色，颜色将为绿色。
So in this special button I would like to override the value specified for borderbrush property in the trigger, instead of Red I would like Green.
所以在这个特殊的按钮中，我想覆盖触发器中为 borderbrush 属性指定的值，而不是红色，我想要绿色。
How to do this?
这该怎么做？
回答by mm8
You could set the BorderBrushproperty using a {DynamicResource}that you can override:
您可以BorderBrush使用{DynamicResource}可以覆盖的属性设置属性：
<SolidColorBrush x:Key="pressed" Color="Red" />
<Style x:Key="MyStyle" TargetType="{x:Type Button}">
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="BorderThickness" Value="0 0 0 3"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="BorderBrush" Value="Orange" />
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="BorderBrush" Value="{DynamicResource pressed}" />
</Trigger>
</Style.Triggers>
</Style>
...
<Button Content="Red" Style="{StaticResource MyStyle}" />
<Button Content="Green" Style="{StaticResource MyStyle}">
<Button.Resources>
<SolidColorBrush x:Key="pressed" Color="Green" />
</Button.Resources>
</Button>
Or you could create another Stylethat overrides the entire trigger:
或者您可以创建另一个Style覆盖整个触发器：
<Button Content="Green">
<Button.Style>
<Style TargetType="Button" BasedOn="{StaticResource MyStyle}">
<Style.Triggers>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Foreground" Value="Green" />
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
