WPF 鼠标移动时触发图片旋转（非动画）

  <Grid>
        <Image x:Name="image" Source="nifi3.gif" RenderTransformOrigin="0.5,0.5">
            <Image.Style>
                <Style TargetType="Image">
                    <Style.Triggers>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter  Property="RenderTransform" >
                                <Setter.Value>
                                    <RotateTransform Angle="40"/>
                                </Setter.Value>
                            </Setter>
                        </Trigger>
                    </Style.Triggers>
                </Style>
            </Image.Style>
        </Image>
    </Grid>