C# WPF 鼠标悬停按钮 - 无内容

Question

我刚刚编辑了这个按钮。因为我想要鼠标悬停效果。不幸的是 Button 的内容没有显示。如果我将鼠标悬停在上面，我想更改字体颜色。

<Button Content="Button" HorizontalAlignment="Left" VerticalAlignment="Bottom" Width="185" Height="50" HorizontalContentAlignment="Left" BorderBrush="{x:Null}" Foreground="{x:Null}" Canvas.Top="42">
    <Button.Style>
        <Style TargetType="{x:Type Button}">
            <Setter Property="Background" Value="#FF37424A"/>
            <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="IsMouseOver" Value="True">
                    <Setter Property="Background" Value="#FF303B43"/>
                </Trigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>

Answer 1

Unfortunately the content of Button is not displayed.

不要将 Foreground 属性设置为 {x:Null}:

And I would like to change the font color, if I go with the mouse over it.

在 IsMouseOver 触发器中添加一个设置 Foreground 属性的 setter:

<Button Content="Button" HorizontalAlignment="Left" VerticalAlignment="Bottom" Width="185" Height="50" 
                HorizontalContentAlignment="Left" BorderBrush="{x:Null}" Canvas.Top="42">
    <Button.Style>
        <Style TargetType="{x:Type Button}">
            <Setter Property="Background" Value="#FF37424A"/>
            <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="IsMouseOver" Value="True">
                    <Setter Property="Background" Value="#FF303B43"/>
                    <Setter Property="Foreground" Value="Red"/>
                </Trigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>