WPF 代码实现动画

<Window x:Class="wpf180709.Window2"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window2" Height="300" Width="300">
    <Grid>
        <Button Content="Move" HorizontalAlignment="Left" VerticalAlignment="Top" Width="60" Height="60" Click="btn_Click">
            <Button.RenderTransform>
                <TranslateTransform x:Name="tt" X="0" Y="0"></TranslateTransform>
            </Button.RenderTransform>
        </Button>
    </Grid>

</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace wpf180709
{
    /// <summary>
    /// Interaction logic for Window2.xaml
    /// </summary>
    public partial class Window2 : Window
    {
        public Window2()
        {
            InitializeComponent();
        }

        private void btn_Click(object sender, RoutedEventArgs e)
        {
            DoubleAnimation daX = new DoubleAnimation();
            DoubleAnimation daY = new DoubleAnimation();

            daX.From = 0;
            daY.From = 0;

            //daX.By = 100;
            //daY.By = 100;

            Random r = new Random();

            daX.To = r.NextDouble() * 300;
            daY.To = r.NextDouble() * 300;

            Duration dur = new Duration(TimeSpan.FromMilliseconds(300));
            daX.Duration = dur;
            daY.Duration = dur;

            this.tt.BeginAnimation(TranslateTransform.XProperty, daX);
            this.tt.BeginAnimation(TranslateTransform.YProperty, daY);
        }
    }
}