C# 如何使按钮图像只可见？

我有“保存”按钮，它有两种状态：不可见（当没有更改时）和可见：当某些文本更改时

因此，我创建了XAML：

<Button x:Name="btnSaveText"                                                                               
        Grid.Column="0"                                          
        VerticalAlignment="Center"                                                                          
        HorizontalAlignment="Center"
        Margin="0,0,1,0" Width="22" Height="22" Padding="0"
        BorderBrush="#EFF4FA"
        Background="#EFF4FA"                                                                                                                   IsEnabled="False"                                        
        Style="{StaticResource stlButton}">
        <Image Source="/UI.Resources;component/PNGImages/Save.png" 
               Style="{StaticResource stlButtonImage}" />
</Button>

<Style TargetType="{x:Type Image}" x:Key="stlButtonImage">
    <Setter Property="Margin" Value="1" />
    <Setter Property="HorizontalAlignment" Value="Center" />
    <Setter Property="VerticalAlignment" Value="Center" />
    <Setter Property="Stretch" Value="None" />
    <Style.Triggers>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="Opacity" Value="0.5" />
        </Trigger>
    </Style.Triggers>
</Style>

<Style TargetType="{x:Type Button}" x:Key="stlButton">
    <Style.Triggers>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="Opacity" Value="0.5" />
            <Setter Property="BorderBrush" Value="#EFF4FA"/>
            <Setter Property="Background" Value="#EFF4FA"/>
        </Trigger>
    </Style.Triggers>
</Style>

但是，当按钮被禁用时，它看起来是这样的：

---

如何使按钮图像仅可见？

将

按钮的背景设置为
透明
：

<Setter Property="Background" Value="Transparent"/>

<Style TargetType="{x:Type Button}" x:Key="stlButton">
    <Style.Triggers>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="Opacity" Value="0.5" />

            <Setter Property="BorderBrush" Value="#EFF4FA"/>
            <Setter Property="Background" Value="Transparent"/>
        </Trigger>
    </Style.Triggers>
</Style>

<Style TargetType="{x:Type Button}" x:Key="stlButton">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">
                <Border Background="{TemplateBinding Background}">
                    <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
                </Border>
             </ControlTemplate>
        </Setter.Value>
    </Setter>
    <Style.Triggers>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="Opacity" Value="0.5" />
            <Setter Property="Background" Value="Transparent"/>
        </Trigger>
    </Style.Triggers>
</Style>