WPF拉开窗帷效果

WPF拉开窗帘效果
从一个界面跳转到另一个界面。另一个界面的显示方式类似于拉开窗帘，从左至右由暗变亮。
------解决方案--------------------------------------------------------
Expression Blend 专门做Silverlight动画的  同时也可以编辑跳转
------解决方案--------------------------------------------------------

<UserControl
	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
	xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"
	xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"
	x:Class="SilverlightApplication11.MainPage"
	Width="800" Height="600">
     
	 <Border Background="White">
	 	<VisualStateManager.VisualStateGroups>
	 		<VisualStateGroup x:Name="VisualStateGroup">
	 			<VisualState x:Name="VisualState">
	 				<Storyboard>
	 					<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="button">
	 						<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
	 						<SplineDoubleKeyFrame KeyTime="0:0:2" Value="1" KeySpline="1,0,1,1"/>
	 					</DoubleAnimationUsingKeyFrames>
	 					<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)" Storyboard.TargetName="button">
	 						<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
	 						<SplineDoubleKeyFrame KeyTime="0:0:2" Value="258" KeySpline="1,0,1,1"/>
	 					</DoubleAnimationUsingKeyFrames>
	 				</Storyboard>
	 			</VisualState>
	 		</VisualStateGroup>
	 	</VisualStateManager.VisualStateGroups>
	 	<Button x:Name="button" Content="Button" HorizontalAlignment="Left" Margin="-224,200,0,299" Width="223" RenderTransformOrigin="0.5,0.5">
	 		<Button.Background>
	 			<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
	 				<GradientStop Color="Black" Offset="0"/>
	 				<GradientStop Color="#FFE90E0E" Offset="0.996"/>
	 				<GradientStop Color="#FE320303" Offset="0.278"/>
	 			</LinearGradientBrush>
	 		</Button.Background>
	 		<Button.RenderTransform>
	 			<CompositeTransform/>
	 		</Button.RenderTransform>
	 	</Button>
	 </Border>
	
</UserControl>

刚刚用Blend随便画的，看看行不行