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动画显示效果是Silverlight/WPF平台中一个非常重要的功能。下面我们就来看一看如何为C1Menu for Silverlight添加动画显示效果。

为了添加动画显示效果，我们需要修改C1Menu的默认模板，并修改Opened的VisualState设置。
添加第一层菜单项动画效果FirstLevelMenuStyle

<VisualState x:Name="Opened">
<Storyboard>
<ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.00100000" Storyboard.TargetName="OpenedElement" Storyboard.TargetProperty="(UIElement.Visibility)">
<DiscreteObjectKeyFrame KeyTime="00:00:00">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<!—可以修改Duration的值来加快/减慢动画显示速度-->
<DoubleAnimation From="0" To="1" BeginTime="00:00:00" Duration="00:00:00.30000" Storyboard.TargetName="AnimationContent" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleY)">
</DoubleAnimation>
</Storyboard>
</VisualState>

非第一层菜单项的动画效果

<VisualState x:Name="Opened">
<Storyboard>
<ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="OpenedElement" Storyboard.TargetProperty="(UIElement.Visibility)">
<DiscreteObjectKeyFrame KeyTime="00:00:00">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<!—可以修改Duration的值来加快/减慢动画显示速度-->
<DoubleAnimation From="0" To="1" BeginTime="00:00:00" Duration="00:00:00.300000" Storyboard.TargetName="_contentControl" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)">
</DoubleAnimation>
</Storyboard>
</VisualState>

源码下载：VS2010 + Silverlight5.0 + ComponentOne Studio for Silverlight 2012V2