PointAnimation 在两个 Point 值之间做线性内插动画处理

xaml

<UserControl x:Class="Silverlight.Common.Test"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

    <StackPanel HorizontalAlignment="Left">
        <StackPanel Orientation="Horizontal">
            <Button Width="65" Height="30" Margin="2" Content="begin" Click="Button_Click"/>
            <Button Width="65" Height="30" Margin="2" Content="pause" Click="Button_Click_1"/>
            <Button Width="65" Height="30" Margin="2" Content="resume" Click="Button_Click_2"/>
            <Button Width="65" Height="30" Margin="2" Content="stop" Click="Button_Click_3"/>
        </StackPanel>
        <Path Fill="Green">
            <Path.Data>
                <EllipseGeometry x:Name="ellipse" Center="50,50" RadiusX="15" RadiusY="15"/>
            </Path.Data>
        </Path>
        <StackPanel.Resources>
            <!--PointAnimation - 在两个 Point 值之间做线性内插动画处理-->
            <!--

                Storyboard.TargetName - 要进行动画处理的对象的名称

                Storyboard.TargetProperty - 要进行动画处理的对象的属性

                BeginTime - 时间线在被触发 BeginTime 的时间后才能开始播放

                    TimeSpan - [-][日.]时:分:秒[.1位到7为的秒后的小数]（可为正；可为负；可为空；默认值为 0）

                From - 动画的起始值

                To - 动画的结束值

                By - 动画从起始值开始计算，所需变化的总量（To 优先于 By）

                Duration - 时间线的持续时间

                    TimeSpan - [-][日.]时:分:秒[.1位到7为的秒后的小数]

                    Automatic - 自动确定

                    Forever - 无限长

                AutoReverse - 动画完成后是否要原路返回。默认值为 false

                RepeatBehavior - 动画重复播放的时间、次数或类型

                    TimeSpan - [-][日.]时:分:秒[.1位到7为的秒后的小数]

                    nx - 播放次数。1x, 2x, 3x 

                    Forever - 永久播放

                SpeedRatio - 时间线的速率的倍数。默认值 1

                FillBehavior - 动画结束后的行为 [System.Windows.Media.Animation.FillBehavior枚举]

                    FillBehavior.HoldEnd - 动画结束后，保留动画属性的结束值。默认值

                    FillBehavior.Stop - 动画结束后，恢复动画属性为其初始值

                -->
            <Storyboard x:Name="storyboard">
                <PointAnimation Storyboard.TargetName="ellipse" Storyboard.TargetProperty="Center" BeginTime="00:00:00"  From="50,50"  To="300,500"  Duration="0:0:3"  AutoReverse="True"  RepeatBehavior="3x" FillBehavior="Stop" >
                </PointAnimation>
            </Storyboard>
           
        </StackPanel.Resources>
    </StackPanel>
</UserControl>

c#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace Silverlight.Common
{
    public partial class Test : UserControl
    {
        public Test()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e) { 
            storyboard.Begin(); 
        }
        private void Button_Click_1(object sender, RoutedEventArgs e) { 
            storyboard.Pause(); 
        }
        private void Button_Click_2(object sender, RoutedEventArgs e) { 
            storyboard.Resume(); 
        }
        private void Button_Click_3(object sender, RoutedEventArgs e) { 
            storyboard.Stop(); 
        }
    }
}