c# wpf 动画结束时运行动作
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Run action when c# wpf animation ends
提问by user1446632
I'm learning wpf and at the same time developing an app with it. I'm having a hard time figuring out how i can run something when a doubleanimation (Or other sorts) is done. For instance:
我正在学习 wpf，同时用它开发一个应用程序。当双重动画（或其他类型）完成时，我很难弄清楚如何运行某些东西。例如：
DoubleAnimation myanim = new DoubleAnimation();
myanim.From = 10;
myanim.To = 100;
myanim.Duration = new Duration(TimeSpan.FromSeconds(3));
myview.BeginAnimation(Button.OpacityPropert, myanim);
//Code to do something when animation ends
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 app
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e)
{
DoubleAnimation widthbutton = new DoubleAnimation();
widthbutton.From = 55;
widthbutton.To = 100;
widthbutton.Duration = new Duration(TimeSpan.FromSeconds(1.5));
button1.BeginAnimation(Button.HeightProperty, widthbutton);
DoubleAnimation widthbutton1 = new DoubleAnimation();
widthbutton1.From = 155;
widthbutton1.To = 200;
widthbutton1.Duration = new Duration(TimeSpan.FromSeconds(1.5));
button1.BeginAnimation(Button.WidthProperty, widthbutton1);
widthbutton.Completed += new EventHandler(myanim_Completed);
}
private void myanim_Completed(object sender, EventArgs e)
{
//your completed action here
MessageBox.Show("Animation done!");
}
}
}
How is this accomplishable? I have read quite a few other posts about this, but they all explain it using xaml, however i would like to do it using c# code. Thanks!
这是如何实现的？我已经阅读了很多关于此的其他帖子，但它们都使用 xaml 进行了解释，但是我想使用 c# 代码来进行。谢谢！
回答by keyboardP
You can attach an event handler to the DoubleAnimation's Completedevent.
您可以将事件处理程序附加到 DoubleAnimation 的Completed事件。
myanim.Completed += new EventHandler(myanim_Completed);
private void myanim_Completed(object sender, EventArgs e)
{
//your completed action here
}
Or, if you prefer it inline, you can do
或者，如果你更喜欢内联，你可以这样做
myanim.Completed += (s,e) =>
{
//your completed action here
};
Remember to attach the handler before starting the animation otherwise it won't fire.
请记住在开始动画之前附加处理程序，否则它不会触发。
