AdaptiveTrigger和DataTemplate

Question

AdaptiveTrigger会在DataTemplate中运行吗？

我的代码是用来自定义我的ShellNavigation，除了视觉状态之外它工作得很好。它们不会触发任何东西。

<shell:ShellHeadView x:Key="ShellHeadView_01">
    <shell:ShellHeadView.ContentTemplate>
        <DataTemplate>
            <Grid Margin="20,0">
                <VisualStateManager.VisualStateGroups>
                    <VisualStateGroup>
                        <VisualState x:Name="GreenBackgroundVisualState">
                            <VisualState.Setters>
                                <Setter Target="headViewLeft.Background" Value="Green" />
                            </VisualState.Setters>
                            <VisualState.StateTriggers>
                                <AdaptiveTrigger MinWindowWidth="1000"/>
                            </VisualState.StateTriggers>
                        </VisualState>
                        <VisualState x:Name="OrangeBackgroundVisualState">
                            <VisualState.Setters>
                                <Setter Target="headViewLeft.Background" Value="Orange" />
                            </VisualState.Setters>
                            <VisualState.StateTriggers>
                                <AdaptiveTrigger MinWindowWidth="2000"/>
                            </VisualState.StateTriggers>
                        </VisualState>
                        <VisualState x:Name="RedBackgroundVisualState">
                            <VisualState.Setters>
                                <Setter Target="headViewLeft.Background" Value="Red" />
                            </VisualState.Setters>
                            <VisualState.StateTriggers>
                                <AdaptiveTrigger MinWindowWidth="3000"/>
                            </VisualState.StateTriggers>
                        </VisualState>
                    </VisualStateGroup>
                </VisualStateManager.VisualStateGroups>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto"/>
                    <ColumnDefinition/>
                </Grid.ColumnDefinitions>
                <Grid Grid.Column="0" x:Name="headViewLeft" Width="100" Height="90">

                </Grid>

Answer 1

尝试将DataTemplate包裹在这样的UserControl内 -

<DataTemplate>
    <UserControl>
        <Grid>
            <VisualStateManager.VisualStateGroups>
            ...
        </Grid>
    </UserControl>
</DataTemplate>

看起来任何有Control属性的Content都可以使用。这就是UserControl工作的原因，ContentControl也是如此。

因此，如果您将UserControl替换为ContentControl并将其设为空Style。它也应该有用。

<Style x:Key="EmptyContentControlStyle" TargetType="ContentControl">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="ContentControl" />
        </Setter.Value>
    </Setter>
</Style>

<DataTemplate>
    <ContentControl Style="{StaticResource EmptyContentControlStyle}">
        <Grid>
            <VisualStateManager.VisualStateGroups>
            ...
        </Grid>
    </ContentControl>
</DataTemplate>