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我正在尝试为我的 TabItem 的背景/渐变设置动画。但是，我收到一个错误：

附加信息：无法解析属性路径“Background.GradientStops[2].Color”中的所有属性引用。验证适用的对象是否支持这些属性。

当我将鼠标悬停在选项卡项上时会发生错误。

这是 XAML：

<Style TargetType="{x:Type TabItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type TabItem}">
                <Grid>
                    <Border Name="Border" BorderBrush="#666" BorderThickness="1,1,1,0" CornerRadius="8,8,0,0" Margin="-2,0,3,-1">
                        <!-- Some irrelevant code here -->
                    </Border>

                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="MouseOver">
                                <Storyboard>
                                    <ColorAnimation Duration="0:0:0.3" To="#EBEBEB" Storyboard.TargetProperty="Background.GradientStops[1].Color" Storyboard.TargetName="Border"/>
                                    <ColorAnimation Duration="0:0:0.3" To="#CDCDCD" Storyboard.TargetProperty="Background.GradientStops[2].Color" Storyboard.TargetName="Border"/>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                </Grid>

                <ControlTemplate.Triggers>
                    <Trigger Property="IsSelected" Value="True">
                        <Setter TargetName="Border" Property="Background">
                            <Setter.Value>
                                <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                                    <GradientStop Color="#fff" Offset="0.35"></GradientStop>
                                    <GradientStop Color="#e9e9e9" Offset="0.75"></GradientStop>
                                </LinearGradientBrush>
                            </Setter.Value>
                        </Setter>
                    </Trigger>

                    <Trigger Property="IsSelected" Value="False">
                        <Setter TargetName="Border" Property="Background">
                            <Setter.Value>
                                <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                                    <GradientStop Offset="0.35">
                                        <GradientStop.Color>
                                            <Color A="127" R="255" G="255" B="255" />
                                        </GradientStop.Color>
                                    </GradientStop>

                                    <GradientStop Offset="0.75">
                                        <GradientStop.Color>
                                            <Color A="127" R="233" G="233" B="233" />
                                        </GradientStop.Color>
                                    </GradientStop>
                                </LinearGradientBrush>
                            </Setter.Value>
                        </Setter>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

我认为Storyboard.TargetProperty是错误的。应该是什么？

4

1 回答 1

1

那不应该是从零开始的索引吗？

<Storyboard> 
    <ColorAnimation Storyboard.TargetProperty="Background.GradientStops[0].Color" .../> 
    <ColorAnimation Storyboard.TargetProperty="Background.GradientStops[1].Color" .../> 
</Storyboard>
于 2012-04-22T16:27:06.613 回答