动态效果的SimpleFillSymbol样式

基本代码如下：

  <esri:SimpleFillSymbol x:Name="DoubleFillSymbol" Fill="Blue" BorderBrush="Blue" BorderThickness="2" >
        <esri:SimpleFillSymbol.ControlTemplate>
            <ControlTemplate>
                <Canvas>
                    <vsm:VisualStateManager.VisualStateGroups>
                        <vsm:VisualStateGroup x:Name="CommonStates">
                            <vsm:VisualState x:Name="Normal">
                                <Storyboard RepeatBehavior="Forever">
                                    <DoubleAnimation BeginTime="00:00:00" Storyboard.TargetName="Element" Storyboard.TargetProperty="(UIElement.Opacity)" From="1" To="0" Duration="00:00:01" />
                                </Storyboard>
                            </vsm:VisualState>
                        </vsm:VisualStateGroup>
                    </vsm:VisualStateManager.VisualStateGroups>
                    <Path x:Name="Element" IsHitTestVisible="False" Fill="{Binding Symbol.Fill}" Stroke="{Binding Symbol.BorderBrush}" StrokeThickness="{Binding Symbol.BorderThickness}"/>
                </Canvas>
            </ControlTemplate>
        </esri:SimpleFillSymbol.ControlTemplate>
    </esri:SimpleFillSymbol>