使用事件触发器怎么会提示异常错误~

Question

数据字典中：    <Style x:Key="DyImage" TargetType="Image">
        <Style.Triggers>
            <EventTrigger RoutedEvent="Mouse.MouseEnter">
                <EventTrigger.Actions>
                    <BeginStoryboard>
                        <Storyboard>
                            <!--DoubleAnimation Duration="0:0:0.2" Storyboard.TargetProperty="Canvas.Left" To="0"/>
                            <DoubleAnimation Duration="0:0:0.2" Storyboard.TargetProperty="Canvas.Top" To="0"/-->
                            <DoubleAnimation Duration="0:0:0.2" Storyboard.TargetProperty="Height" To="100"/>
                            <DoubleAnimation Duration="0:0:0.2" Storyboard.TargetProperty="Width" To="100"/>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger.Actions>
            </EventTrigger>
        </Style.Triggers>
    </Style>XAML中：<Image Style="{DynamicResource DyImage}" Grid.Row="0" Grid.Column="0" Grid.RowSpan="3" Source="{Binding HeaderImage, Mode=OneWay}" />
为什么会提示异常：
无法使用“System.Windows.Media.Animation.DoubleAnimation”动态“System.Windows.Controls.Image”上的“Height”属性。有关详细信息，请查看内部异常。
求帮忙解答下啊

Answer 1

Image的高度是Auto 改掉就行了 改成100之类的