WPF 控件 【C】 CheckBox (一)自定义单选框CheckBox边框的大小：利用Viewbox让钩随边框大小而自动伸缩功能，利用IsChecked选中后可是打钩。

源代码

<Style x:Key="CheckBoxStyle" TargetType="{x:Type CheckBox}">
        <Setter Property="SnapsToDevicePixels" Value="true" />
        <Setter Property="OverridesDefaultStyle" Value="False" />
        <Setter Property="FocusVisualStyle" Value="{DynamicResource CheckBoxFocusVisual}" />
        <Setter Property="Height" Value="52"/>
        <Setter Property="IsChecked" Value="False"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="CheckBox">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Grid Height="{TemplateBinding Height}" Width="{TemplateBinding Height}">
                                <Rectangle x:Name="CheckBoxRectangle" Fill="White" Opacity="0.3" RadiusY="5" RadiusX="5"/>
                                <Rectangle x:Name="CheckBoxRectangleOut" Stroke="#FFABADB3" StrokeThickness="1" RadiusY="5" RadiusX="5"/>
                                <Grid x:Name="CheckedMark" Height="{TemplateBinding Height}" Width="{TemplateBinding Height}" Visibility="Collapsed" >
                                    <Viewbox>
                                        <Grid> 
                                            <Path SnapsToDevicePixels="True" StrokeThickness="3" Data="M1,9 L10,17" Stroke="#3553ad"/>
                                            <Path SnapsToDevicePixels="True" StrokeThickness="3" Data="M8,17 L20,4" Stroke="#3553ad"/>
                                        </Grid>
                                    </Viewbox>
                                </Grid>
                              </Grid>
                            <ContentPresenter Grid.Column="1" VerticalAlignment="Center" Margin="8,0,0,0"/>
                        </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="True">
                            <Setter TargetName="CheckedMark" Property="Visibility" Value="Visible"></Setter>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

效果图：