WPF中Button 按钮 的IsPressed 触发 background 属性无效？

Question

mouseover 可以成功修改 button的background。但是按下按钮的时候就background修改失败了第一：ispressed触发是成功作用的。是background没有被正确修改样式
第二：button 按下的时候background就变白了。我想问题是出在这里。求在按下按钮的时候如何正确的修改button 的background

Answer 1

<Window.Resources>
        <Style TargetType="{x:Type Button}">
            <Setter Property="FontSize" Value="14"/>
            <Setter Property="Foreground" Value="White" />
            <Setter Property="BorderBrush" Value="{x:Null}"/>
            
            <Setter Property="Background">
                <Setter.Value>
                    <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="#FF494F5B" Offset="0.382"/>
                    <GradientStop Color="#FFC3C8CE"/>
                    <GradientStop Color="#FF666F7E" Offset="1"/>
                </LinearGradientBrush>
                </Setter.Value>
            </Setter>
            <Setter Property="BitmapEffect">
                <Setter.Value>
                <DropShadowBitmapEffect Color="Black" Direction="280" ShadowDepth="3" Softness="0.1"   Opacity="0.6"/>
                </Setter.Value>
            </Setter>
           
            <Style.Triggers>
                <Trigger Property="IsPressed" Value="true">
                    <Setter Property = "Background">
                        <Setter.Value>
                            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                                <GradientStop Color="#FF676F7E" Offset="1"/>
                                <GradientStop Color="#FF959CA6"/>
                                <GradientStop Color="#FF59616E" Offset="0.669"/>
                            </LinearGradientBrush>
                        </Setter.Value>
                    </Setter>
                    <Setter Property="BitmapEffect">
                        <Setter.Value>
                            <BitmapEffectGroup>
                                <DropShadowBitmapEffect Color="Black" Direction="320" ShadowDepth="1" Softness="0.1"   Opacity="0.1"/>
                                <BevelBitmapEffect BevelWidth="2" EdgeProfile="CurvedIn" LightAngle="280" Relief="0.1" Smoothness="0.1" />
                            </BitmapEffectGroup>
                        </Setter.Value>
                    </Setter>
                </Trigger>
                <Trigger Property="IsMouseOver" Value="true">
                    <Setter Property = "Background">
                        <Setter.Value>
                            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                                <GradientStop Color="#FF858FA0" Offset="1"/>
                                <GradientStop Color="#FFC2C8D0"/>
                                <GradientStop Color="#FF6A788E" Offset="0.441"/>
                            </LinearGradientBrush>                        </Setter.Value>
                    </Setter>
                    <Setter Property="BitmapEffect">
                        <Setter.Value>
                            <BitmapEffectGroup>
                                <DropShadowBitmapEffect Color="Black" Direction="320" ShadowDepth="2" Softness="0.1"   Opacity="0.5"/>
                                <BevelBitmapEffect BevelWidth="2" EdgeProfile="CurvedIn" LightAngle="135" Relief="0.1" Smoothness="0.1" />
                            </BitmapEffectGroup>                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>           
            
        </Style>
        <Style x:Key="MyFocusVisual">
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Rectangle Margin="-2" StrokeThickness="1" Stroke="Red" StrokeDashArray="1 2"/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>    </Window.Resources>

Answer 2

我也碰见了这个问题，设置为false的时候有效果