WPF从按钮样式覆盖触发器

Question

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>

这种风格由两个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.

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Red我想要Green.

这该怎么做？

Answer 1

您可以BorderBrush使用{DynamicResource}可以覆盖的属性来设置属性:

<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>

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>