实现控件或布局的左右移动（晃动）主要用到DoubleAnimation以及Storyboard
布局代码为：

<Canvas>
        <Grid Width="200" Height="100" Background="MediumAquamarine" Name="GroupboxArea" Canvas.Left="100" Canvas.Top="200"/>
        <Button Content="Button" Height="25" Width="78" Click="Button_Click"/>
    </Canvas>

后台代码为:

 private void Button_Click(object sender, RoutedEventArgs e)
        {
            DoubleAnimation DAnimation = new DoubleAnimation();
            DAnimation.From = 100;//起点
            DAnimation.To = 280;//终点
            DAnimation.Duration = new Duration(TimeSpan.FromSeconds(0.5));//时间

            Storyboard.SetTarget(DAnimation, GroupboxArea);
            Storyboard.SetTargetProperty(DAnimation, new PropertyPath(Canvas.LeftProperty));
            Storyboard story = new Storyboard();

            story.Completed += new EventHandler(story_Completed);//完成后要做的事
            //story.RepeatBehavior = RepeatBehavior.Forever;//无限次循环，需要的自己加上
            story.Children.Add(DAnimation);
            story.Begin();
        }
        void story_Completed(object sender, EventArgs e)
        {
            DoubleAnimation DAnimation = new DoubleAnimation();
            DAnimation.From = 280;//起点
            DAnimation.To = 100;//终点
            DAnimation.Duration = new Duration(TimeSpan.FromSeconds(0.5));//时间

            Storyboard.SetTarget(DAnimation, GroupboxArea);
            Storyboard.SetTargetProperty(DAnimation, new PropertyPath(Canvas.LeftProperty));
            Storyboard story = new Storyboard();

            story.Completed += new EventHandler(storyCompleted);//完成后要做的事
            //story.RepeatBehavior = RepeatBehavior.Forever;//无限次循环，需要的自己加上
            story.Children.Add(DAnimation);
            story.Begin();
        }

        void storyCompleted(object sender, EventArgs e)
        {
            DoubleAnimation DAnimation = new DoubleAnimation();
            DAnimation.From = 100;//起点
            DAnimation.To = 200;//终点
            DAnimation.Duration = new Duration(TimeSpan.FromSeconds(0.5));//时间

            Storyboard.SetTarget(DAnimation, GroupboxArea);
            Storyboard.SetTargetProperty(DAnimation, new PropertyPath(Canvas.LeftProperty));
            Storyboard story = new Storyboard();

            //story.Completed += new EventHandler(storyCompleted);//完成后要做的事
            //story.RepeatBehavior = RepeatBehavior.Forever;//无限次循环，需要的自己加上
            story.Children.Add(DAnimation);
            story.Begin();
        }