WpfApplication7/MainWindow.xaml.cs

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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.Navigation;
using System.Windows.Shapes;

namespace WpfApplication7
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            //实例化一个DoubleAnimation类
            DoubleAnimation doubleAnimation = new DoubleAnimation();
            doubleAnimation.From = btn1.Width;
            //前50%时间加速度运行。
            doubleAnimation.AccelerationRatio = 0.5;
            ///后20%时间减速运行
            doubleAnimation.DecelerationRatio = 0.2;

            doubleAnimation.To = 250;
            doubleAnimation.Duration = new Duration(TimeSpan.FromSeconds(5));
            btn1.BeginAnimation(Button.WidthProperty, doubleAnimation);

            //实例化一个DoubleAnimation类
            DoubleAnimation doubleAnimation1 = new DoubleAnimation();
            doubleAnimation1.From = btn1.Height;
            //前50%时间加速度运行。
            doubleAnimation1.AccelerationRatio = 0.5;
            ///后20%时间减速运行
            doubleAnimation1.DecelerationRatio = 0.2;
            doubleAnimation1.To = 250;
            doubleAnimation1.Duration = new Duration(TimeSpan.FromSeconds(5));
            btn1.BeginAnimation(Button.HeightProperty, doubleAnimation1);
        }
    }
}