如何为ListPicker项设置所选颜色

Question

目前，ListPicker中的所选项目被设置为手机强调颜色，如何使用自定义颜色覆盖此项？

我知道这将采用一种风格，但我不确定这应该是什么......

Answer 1

取决于ListPicker.ExpansionMode。如果它是ExpansionAllowed - 你的风格应该是这样的：

<Style TargetType="toolkit:ListPickerItem">
    <Setter Property="Background" Value="Transparent"/>
    <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
    <Setter Property="Padding" Value="8 6"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="toolkit:ListPickerItem">
                <Grid x:Name="grid" Background="{TemplateBinding Background}">
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="SelectionStates">
                            <VisualState x:Name="Unselected">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ContentContainer"
                                        Storyboard.TargetProperty="Foreground"
                                        Duration="0">
                                        <DiscreteObjectKeyFrame  KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <!-- Normal color -->
                                                <SolidColorBrush Color="Black"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Selected">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="ContentContainer"
                                        Storyboard.TargetProperty="Foreground"
                                        Duration="0">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <!-- Selected color -->
                                                <SolidColorBrush Color="Orange"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                    <!-- Optionally - background selected color -->
                                    <!--<ObjectAnimationUsingKeyFrames
                                        Storyboard.TargetName="grid"
                                        Storyboard.TargetProperty="Background"
                                        Duration="0">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <SolidColorBrush Color="Gray"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>-->
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <ContentControl
                        x:Name="ContentContainer"
                        Content="{TemplateBinding Content}"
                        ContentTemplate="{TemplateBinding ContentTemplate}"
                        Foreground="{TemplateBinding Foreground}"
                        VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
                        HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                        Margin="{TemplateBinding Padding}" />
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

但是，如果它是FullScreenOnly - 唯一的方法是修改工具包源代码并使用所需的更改来构建它。在我看来，这是不值得的。