WPF:如何在样式和ControlTemplate之间传递Content属性

Question

我正试图根据一个属性在WPF中的两种样式之间切换。为了在样式之间切换，我为每个样式使用了ControlTemplate，并为一个带有触发器的样式在ControlTemplate之间切换。我的问题是，我在每个基本样式中都有一个ContentPresenter，我不能从外部（从用法）设置它。

这是我在xaml:中的代码

    <Style x:Key="SecondaryButtonStyle" TargetType="{x:Type Button}">
    <Setter Property="Background" Value="{StaticResource GrayButtonNormalBackground}"/>
    <Setter Property="BorderBrush" Value="Transparent"/>
    <Setter Property="BorderThickness" Value="2"/>
    <Setter Property="Foreground" Value="#FF494F5A"/>
    <Setter Property="FontSize" Value="24.5" />
    <Setter Property="FontWeight" Value="Bold" />
    <Setter Property="HorizontalContentAlignment" Value="Center"/>
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="MinHeight" Value="76" />
    <Setter Property="Padding" Value="10,0,10,0"/>
    <Setter Property="Effect" Value="{StaticResource ButtonEffect}"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">
                <Border Background="{TemplateBinding Background}" CornerRadius="5,5,5,5"
                            BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" >
                    <Grid>                        
                        <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" 
                                                  RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" 
                                                  VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>                        
                    </Grid>
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter Property="Background" Value="{StaticResource GrayButtonMouseOverBackground}" />
                    </Trigger>
                    <Trigger Property="IsPressed" Value="True">
                        <Setter Property="Background" Value="{StaticResource GrayButtonIsPressedBackground}" />
                    </Trigger>

                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
<Style x:Key="SecondaryButtonWithArrowStyle" TargetType="{x:Type Button}">
    <Setter Property="Background" Value="{StaticResource GrayButtonNormalBackground}"/>
    <Setter Property="BorderBrush" Value="Transparent"/>
    <Setter Property="BorderThickness" Value="2"/>
    <Setter Property="Foreground" Value="#FF494F5A"/>
    <Setter Property="FontSize" Value="24.5" />
    <Setter Property="FontWeight" Value="Bold" />
    <Setter Property="HorizontalContentAlignment" Value="Center"/>
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="MinHeight" Value="76" />
    <Setter Property="Padding" Value="20,0"/>
    <Setter Property="Effect" Value="{StaticResource ButtonEffect}"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">
                <Border Background="{TemplateBinding Background}" CornerRadius="5,32,32,5"
                            BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" >
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>
                        <Grid Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="12,4,0,4">
                            <Path Data="F1M46,23.478C46,10.512 35.704,0 23,0 10.299,0 0,10.512 0,23.478 0,36.44 10.299,46.951 23,46.951 35.704,46.951 46,36.44 46,23.478" 
                                    Fill="#FF646A74" x:Name="Path"/>
                            <Path Data="F1M12.504,9.03L9.823,9.028 5.15,9.025 12.273,1.903 10.369,0 1.903,8.466 0,10.369 10.369,20.739 12.273,18.836 5.144,11.706 9.822,11.709 12.502,11.711 20.912,11.715 20.913,9.035z" 
                                    Fill="White" HorizontalAlignment="Center" VerticalAlignment="Center" />
                        </Grid>
                        <ContentPresenter Grid.Column="1" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" 
                                                  RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" 
                                                  VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>                        
                    </Grid>
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter Property="Background" Value="{StaticResource GrayButtonMouseOverBackground}" />
                    </Trigger>
                    <Trigger Property="IsPressed" Value="True">
                        <Setter Property="Background" Value="{StaticResource GrayButtonIsPressedBackground}" />
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
<ControlTemplate x:Key="NormalButton">
    <Button Style="{StaticResource SecondaryButtonStyle}"  />
</ControlTemplate>
<ControlTemplate x:Key="ArrowButton">
    <Button Style="{StaticResource SecondaryButtonWithArrowStyle}" />
</ControlTemplate>

<Style x:Key="SwitchButtonStyle" TargetType="{x:Type Button}">
    <Style.Triggers>
        <Trigger Property="IsMouseOver" Value="False">
            <Setter Property="Template" Value="{StaticResource NormalButton}" />
        </Trigger>
        <Trigger Property="IsMouseOver" Value="True">
            <Setter Property="Template" Value="{StaticResource ArrowButton}" />
        </Trigger>
    </Style.Triggers>
</Style>

用法是：

<Button Style="{StaticResource SwitchButtonStyle}" Content="Back" HorizontalAlignment="Center" VerticalAlignment="Center" />  

我该如何制作取Content="Back"的按钮？

谢谢！

安娜。

Answer 1

我找到了一个解决方案：我将样式更改为ControlTemplate，并创建了一个基本样式，该样式将是带有触发器的主样式的BasedOn样式。

新代码是：

<Style x:Key="BaseButtonWithArrowStyle" TargetType="{x:Type Button}">
            <Setter Property="Background" Value="{StaticResource GrayButtonNormalBackground}"/>
            <Setter Property="BorderBrush" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="2"/>
            <Setter Property="Foreground" Value="#FF494F5A"/>
            <Setter Property="FontSize" Value="24.5" />
            <Setter Property="FontWeight" Value="Bold" />
            <Setter Property="HorizontalContentAlignment" Value="Center"/>
            <Setter Property="VerticalContentAlignment" Value="Center"/>
            <Setter Property="MinHeight" Value="76" />
            <Setter Property="Effect" Value="{StaticResource ButtonEffect}"/>
        </Style>

        <ControlTemplate x:Key="NormalButton" TargetType="Button">
            <Border Background="{TemplateBinding Background}" CornerRadius="5"
                            BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" >
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="Auto" />
                    </Grid.ColumnDefinitions>
                    <Grid Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="12,0,0,0">
                        <Path Data="F1M46,23.478C46,10.512 35.704,0 23,0 10.299,0 0,10.512 0,23.478 0,36.44 10.299,46.951 23,46.951 35.704,46.951 46,36.44 46,23.478" 
                                    Fill="#FF646A74" x:Name="Path"/>
                        <Path Data="F1M12.504,9.03L9.823,9.028 5.15,9.025 12.273,1.903 10.369,0 1.903,8.466 0,10.369 10.369,20.739 12.273,18.836 5.144,11.706 9.822,11.709 12.502,11.711 20.912,11.715 20.913,9.035z" 
                                    Fill="White" HorizontalAlignment="Center" VerticalAlignment="Center" />
                    </Grid>
                    <ContentPresenter Grid.Column="1" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" 
                                                  RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" 
                                                  VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                </Grid>
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter Property="Background" Value="{StaticResource GrayButtonMouseOverBackground}" />
                </Trigger>
                <Trigger Property="IsPressed" Value="True">
                    <Setter Property="Background" Value="{StaticResource GrayButtonIsPressedBackground}" />
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>

        <ControlTemplate x:Key="ArrowButton" TargetType="Button">
            <Border Background="{TemplateBinding Background}" CornerRadius="5,32,32,5"
                            BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" >
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="*" />
                    </Grid.ColumnDefinitions>
                    <Grid Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="12,4,0,4">
                        <Path Data="F1M46,23.478C46,10.512 35.704,0 23,0 10.299,0 0,10.512 0,23.478 0,36.44 10.299,46.951 23,46.951 35.704,46.951 46,36.44 46,23.478" 
                                    Fill="#FF646A74" x:Name="Path"/>
                        <Path Data="F1M12.504,9.03L9.823,9.028 5.15,9.025 12.273,1.903 10.369,0 1.903,8.466 0,10.369 10.369,20.739 12.273,18.836 5.144,11.706 9.822,11.709 12.502,11.711 20.912,11.715 20.913,9.035z" 
                                    Fill="White" HorizontalAlignment="Center" VerticalAlignment="Center" />
                    </Grid>
                    <ContentPresenter Grid.Column="1" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" 
                                                  RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" 
                                                  VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                    <Viewbox Width="55" Height="55" Grid.Column="2">
                        <Grid HorizontalAlignment="Left" VerticalAlignment="Center" Margin="0,4,4,4" RenderTransformOrigin="0.5,0.5">
                            <Path Data="F1M53.214,40.132C54.801,36.559 55.708,32.607 55.708,28.435 55.708,12.757 43.212,0 27.854,0 12.495,0 0,12.757 0,28.435 0,44.116 12.495,56.873 27.854,56.873 32.587,56.873 37.042,55.653 40.95,53.521" 
                                          Fill="White"/>
                            <Path Data="F1M46.556,38.537L45.676,39.265 45.723,46.108 28.875,46.108 28.875,44.318 28.221,44.594 28.221,42.656 46.556,35.641z M27.854,0C23.121,0,18.666,1.221,14.759,3.353L24.395,25.827C33.549,28.967 39.062,26.315 40.16,25.926 41.325,25.514 42.419,25.702 43.139,25.904 44.271,26.215 46.152,28.391 45.442,29.216 41.664,33.584 30.583,38.32 28.825,38.204 27.066,38.092 23.007,38.156 23.007,38.156L22.645,39.563 14.373,41.318C14.373,41.318 13.041,38.472 12.885,37.841 12.728,37.209 13.26,36.858 13.26,36.858 12.355,36.334 11.869,33.725 11.626,31.787L9.378,32.791 2.494,16.743C0.906,20.314 0,24.267 0,28.439 0,44.117 12.496,56.873 27.854,56.873 43.213,56.873 55.708,44.117 55.708,28.439 55.708,12.759 43.213,0 27.854,0" 
                                          Fill="#FFFF8241" RenderTransformOrigin="0.5,0.5" >
                                <Path.RenderTransform>
                                    <TransformGroup>
                                        <ScaleTransform ScaleY="1" ScaleX="-1"/>
                                    </TransformGroup>
                                </Path.RenderTransform>
                            </Path>
                        </Grid>
                    </Viewbox>
                </Grid>
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter Property="Background" Value="{StaticResource GrayButtonMouseOverBackground}" />
                </Trigger>
                <Trigger Property="IsPressed" Value="True">
                    <Setter Property="Background" Value="{StaticResource GrayButtonIsPressedBackground}" />
                </Trigger>

            </ControlTemplate.Triggers>
        </ControlTemplate>
        <Style x:Key="SwitchButtonStyle" TargetType="{x:Type Button}" BasedOn="{StaticResource BaseButtonWithArrowStyle}">
            <Style.Triggers>
                <Trigger Property="IsMouseOver" Value="False">
                    <Setter Property="Template" Value="{StaticResource NormalButton}" />
                    <Setter Property="Padding" Value="42,0,70,0"/>
                </Trigger>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter Property="Template" Value="{StaticResource ArrowButton}" />
                    <Setter Property="Padding" Value="20,0"/>
                </Trigger>
            </Style.Triggers>
        </Style>

现在，按钮的内容根据中的content属性发生变化

<Button Style="{StaticResource SwitchButtonStyle}" Content="Back" HorizontalAlignment="Center" VerticalAlignment="Center" />