silverlight控件动画状态的过渡

动画代码：

 xmlns:vsm="clr-namespace:System.Windows;assembly=System.Windows"

<vsm:VisualStateManager.VisualStateGroups>
            <vsm:VisualStateGroup x:Name="FocusStateGroup">
                <vsm:VisualState x:Name="Focus">
                    <Storyboard>
                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)">
                            <SplineDoubleKeyFrame KeyTime="00:00:00.1000000" Value="1.1"/>
                            <SplineDoubleKeyFrame KeyTime="00:00:00.2000000" Value="0.95" KeySpline="0,0,0.5,1"/>
                            <SplineDoubleKeyFrame KeyTime="00:00:00.3000000" Value=""/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)">
                            <SplineDoubleKeyFrame KeyTime="00:00:00.1000000" Value="1.1"/>
                            <SplineDoubleKeyFrame KeyTime="00:00:00.2000000" Value="0.95" KeySpline="0,0,0.5,1"/>
                            <SplineDoubleKeyFrame KeyTime="00:00:00.3000000" Value=""/>
                        </DoubleAnimationUsingKeyFrames>
                    </Storyboard>
                </vsm:VisualState>
                <vsm:VisualState x:Name="Unfocus">
                    <Storyboard>
                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)">
                            <SplineDoubleKeyFrame KeyTime="00:00:00.1000000" Value="0.95" KeySpline="0,0,0.5,1"/>
                            <SplineDoubleKeyFrame KeyTime="00:00:00.2000000" Value=""/>
                        </DoubleAnimationUsingKeyFrames>
                        <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)">
                            <SplineDoubleKeyFrame KeyTime="00:00:00.1000000" Value="0.95" KeySpline="0,0,0.5,1"/>
                            <SplineDoubleKeyFrame KeyTime="00:00:00.2000000" Value=""/>
                        </DoubleAnimationUsingKeyFrames>
                    </Storyboard>
                </vsm:VisualState>
            </vsm:VisualStateGroup>
        </vsm:VisualStateManager.VisualStateGroups>

后台代码触发动画，并让其从第一个状态过渡到第二个状态

private void AddContactButton_MouseEnter(object sender, MouseEventArgs e)
        {
            VisualStateManager.GoToState(this, "Focus", true);
        }

        private void AddContactButton_MouseLeave(object sender, MouseEventArgs e)
        {
            VisualStateManager.GoToState(this, "Unfocus", true);
        }

        protected void InitEvents()
        {
            base.MouseEnter+=(new MouseEventHandler(this.AddContactButton_MouseEnter));
            base.MouseLeave+=(new MouseEventHandler(this.AddContactButton_MouseLeave));
        }