动画 Animation

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1	using System.Windows.Media.Animation;

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<Grid>         <StackPanel>             <Button x:Name="btn" Content="执行动画" Width="100" Height="40" Click="Button_Click"/>         </StackPanel>     </Grid>

　

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private void Button_Click(object sender, RoutedEventArgs e)       {           //创建一个双精度的动画           DoubleAnimation animation = new DoubleAnimation();           animation.By = -30;//设置范围，在原来的基础上减30           //animation.From = btn.Width;//动画开始值           //animation.To = btn.Width - 30;//动画结束值           animation.Duration = TimeSpan.FromSeconds(3);//动画的持续时间           animation.AutoReverse = true;//执行完动画之后，恢复到原始状态           //animation.RepeatBehavior = RepeatBehavior.Forever;//动画一直持续执行           //animation.RepeatBehavior = new RepeatBehavior(3);//动画执行3次             animation.Completed += Animation_Completed;           //在当前按钮上执行该动画           btn.BeginAnimation(Button.WidthProperty, animation);       }         private void Animation_Completed(object? sender, EventArgs e)       {           btn.Content = "动画已完成";       }