Question

我是Windows Phone动画的新手，并使用下面的代码，但它给我编译错误：

＆＃39; System.Windows.Controls.Button＆＃39;不包含＆＃39; BeginAnimation＆＃39;的定义没有扩展方法＆＃39; BeginAnimation＆＃39;接受类型＆＃39; System.Windows.Controls.Button＆＃39;的第一个参数。可以找到（你错过了使用指令或程序集引用吗？）

我缺少哪个参考？

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.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;

    private void button1_Click(object sender, RoutedEventArgs e)
    {
        DoubleAnimation da = new DoubleAnimation();
        da.From = 30;
        da.To = 100;
        da.Duration = new Duration(TimeSpan.FromSeconds(1));
        button1.BeginAnimation(Button.HeightProperty, da);            
    }

Answer 1

WP7中不存在UIElement.BeginAnimation方法。相反，您需要创建一个故事板，如下所示：

private void button1_Click(object sender, RoutedEventArgs e)
{
  var sb = new Storyboard();
  var db = CreateDoubleAnimation(30, 100,
         button1, Button.HeightProperty, TimeSpan.FromMilliseconds(1000));
  sb.Children.Add(db);
  sb.Begin();
}

private static DoubleAnimation CreateDoubleAnimation(double from, double to, 
      DependencyObject target, object propertyPath, TimeSpan duration)
{
  var db = new DoubleAnimation();
  db.To = to;
  db.From = from;
  db.Duration = duration;
  Storyboard.SetTarget(db, target);
  Storyboard.SetTargetProperty(db, new PropertyPath(propertyPath));
  return db;
}

在Windows Phone中编辑动画时出错

1 个答案: