DoubleAnimation Loop forever


   
  


<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="AnimatedLabel" Height="498" Width="530" WindowStartupLocation="CenterScreen" >
  <StackPanel>
    <Button Content ="Animate Height" Click ="btnAnimatelblMessage_Click" />
    <Label Name ="lblHeight"  Content ="Animate Height!"/>
    <Button Content ="Animate Transparency" Click ="btnAnimatelblTransparency_Click"/>
    <Label Background ="Cornsilk" Name ="lblTransparency"  Content ="Animate Transparency!"/>
  </StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Media.Animation;

namespace WpfApplication1
{
  public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();
    }

    protected void btnAnimatelblMessage_Click(object sender, RoutedEventArgs args)
    {
      DoubleAnimation dblAnim = new DoubleAnimation();
      dblAnim.From = 40;
      dblAnim.To = 200;

      dblAnim.AutoReverse = true;

      dblAnim.RepeatBehavior = RepeatBehavior.Forever;


      dblAnim.Duration = new Duration(TimeSpan.FromSeconds(4));
      lblHeight.BeginAnimation(Label.HeightProperty, dblAnim);
    }

    protected void btnAnimatelblTransparency_Click(object sender, RoutedEventArgs args)
    {
      DoubleAnimation dblAnim = new DoubleAnimation();
      dblAnim.From = 1.0;
      dblAnim.To = 0.0;
      dblAnim.Duration = new Duration(TimeSpan.FromSeconds(10));
      lblTransparency.BeginAnimation(Label.OpacityProperty, dblAnim);
    }
  }
}