WPF中DataTrigger实现图标旋转无效，求排查代码问题

你的代码里图标不旋转的核心原因是Path未配置RotateTransform，动画找不到要修改的Angle属性，同时存在动画目标路径和停止逻辑的疏漏，具体修复如下：

1. 给Path添加RotateTransform #

需要在Path中加入RenderTransform并包含RotateTransform，同时设置旋转中心（避免图标偏移）：

<Path Name="IcoMissionState" Stretch="Fill">
    <!-- 添加旋转变换配置 -->
    <Path.RenderTransform>
        <RotateTransform CenterX="10" CenterY="10"/> <!-- 对应Width/Height=20的中心位置 -->
    </Path.RenderTransform>
    <!-- 原有Style代码 -->
</Path>

2. 修正动画的TargetProperty路径 #

原动画的属性路径不正确，需指定到RenderTransform下的RotateTransform：

<DoubleAnimation Storyboard.TargetProperty="(RenderTransform).(RotateTransform.Angle)"
                 AutoReverse="False"
                 RepeatBehavior="Forever"
                 From="0"
                 To="-360"
                 FillBehavior="HoldEnd" <!-- 改为HoldEnd，避免条件退出后角度重置 -->
                 Duration="0:0:4" />

3. 添加动画停止逻辑（推荐） #

当MultiDataTrigger的条件不再满足时，需停止动画，否则动画会持续播放。给BeginStoryboard命名并添加ExitActions：

<MultiDataTrigger.EnterActions>
    <BeginStoryboard Name="RotateStoryboard"> <!-- 给BeginStoryboard命名 -->
        <Storyboard>
            <DoubleAnimation Storyboard.TargetProperty="(RenderTransform).(RotateTransform.Angle)"
                             AutoReverse="False"
                             RepeatBehavior="Forever"
                             From="0"
                             To="-360"
                             FillBehavior="HoldEnd"
                             Duration="0:0:4" />
        </Storyboard>
    </BeginStoryboard>
</MultiDataTrigger.EnterActions>
<!-- 添加退出时停止动画的逻辑 -->
<MultiDataTrigger.ExitActions>
    <StopStoryboard BeginStoryboardName="RotateStoryboard"/>
</MultiDataTrigger.ExitActions>

完整修复后的代码 #

<Canvas ClipToBounds="True" Margin="0,0,0,0" Width="27" Height="27" HorizontalAlignment="Center">
    <Path Name="IcoMissionState" Stretch="Fill">
        <Path.RenderTransform>
            <RotateTransform CenterX="10" CenterY="10"/>
        </Path.RenderTransform>
        <Path.Style>
            <Style TargetType="{x:Type Path}">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding Path=[StatoMissione]}" Value="2">
                        <Setter Property="Data" Value="{DynamicResource IcoMSPrenotato}"/>
                        <Setter Property="Width" Value="20"/>
                        <Setter Property="Height" Value="20"/>
                        <Setter Property="ToolTip" Value="Prenotato"/>
                    </DataTrigger>
                    <MultiDataTrigger>
                        <MultiDataTrigger.Conditions>
                            <Condition Binding="{Binding Path=IsSelected, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="False"/>
                            <Condition Binding="{Binding Path=[StatoMissione]}" Value="3"/>
                        </MultiDataTrigger.Conditions>
                        <Setter Property="Fill" Value="{DynamicResource Scb_Blu_02}"/>
                        <Setter Property="Data" Value="{DynamicResource IcoMSInEsecuzione}"/>
                        <Setter Property="Width" Value="20"/>
                        <Setter Property="Height" Value="20"/>
                        <Setter Property="ToolTip" Value="In esecuzione"/>
                        <MultiDataTrigger.EnterActions>
                            <BeginStoryboard Name="RotateStoryboard">
                                <Storyboard>
                                    <DoubleAnimation Storyboard.TargetProperty="(RenderTransform).(RotateTransform.Angle)"
                                                     AutoReverse="False"
                                                     RepeatBehavior="Forever"
                                                     From="0"
                                                     To="-360"
                                                     FillBehavior="HoldEnd"
                                                     Duration="0:0:4" />
                                </Storyboard>
                            </BeginStoryboard>
                        </MultiDataTrigger.EnterActions>
                        <MultiDataTrigger.ExitActions>
                            <StopStoryboard BeginStoryboardName="RotateStoryboard"/>
                        </MultiDataTrigger.ExitActions>
                    </MultiDataTrigger>
                </Style.Triggers>
            </Style>
        </Path.Style>
    </Path>
</Canvas>

内容的提问来源于stack exchange，提问作者user20182161