[英]How to animate a ProgressBar Value Property using Storyboard DoubleAnimation in Windows 8.1
[英]Creating a Storyboard DoubleAnimation for Width property of Rectangle using code C# UWP
我正在测试Storyboard.SetTarget方法。 我需要为矩形的宽度和高度变化设置动画。 我找到了Microsoft示例,但是当我在程序中包含代码时,该解决方案将无法构建和部署。
我收到这样的错误:
IDE0006加载项目时遇到错误。 某些项目功能(例如针对失败项目的完整解决方案分析以及依赖该项目的项目)已被禁用。
错误CS0246:找不到类型或名称空间名称'Color'(您是否缺少using指令或程序集引用?)
当我添加名称空间时:
System.Windows.Media.Animation
我得到错误:
错误CS0234:类型或名称空间名称“媒体”在名称空间“ System.Windows”中不存在(您是否缺少程序集引用?)
我是否为UWP使用示例?
这是我使用的示例代码:
private void Create_And_Run_Animation(object sender, EventArgs e)
{
// Create a yellow rectangle that will be the target
// of the animation.
Rectangle myRectangle = new Rectangle();
myRectangle.Width = 200;
myRectangle.Height = 20;
Color myColor = Color.FromArgb(255, 255, 0, 0);
SolidColorBrush myBrush = new SolidColorBrush();
myBrush.Color = myColor;
myRectangle.Fill = myBrush;
// Add the rectangle to the tree.
LayoutRoot.Children.Add(myRectangle);
// Create a duration of 2 seconds.
Duration duration = new Duration(TimeSpan.FromSeconds(2));
// Create two DoubleAnimations and set their properties.
DoubleAnimation myDoubleAnimation1 = new DoubleAnimation();
DoubleAnimation myDoubleAnimation2 = new DoubleAnimation();
myDoubleAnimation1.Duration = duration;
myDoubleAnimation2.Duration = duration;
Storyboard sb = new Storyboard();
sb.Duration = duration;
sb.Children.Add(myDoubleAnimation1);
sb.Children.Add(myDoubleAnimation2);
Storyboard.SetTarget(myDoubleAnimation1, myRectangle);
Storyboard.SetTarget(myDoubleAnimation2, myRectangle);
// Set the attached properties of Canvas.Left and Canvas.Top
// to be the target properties of the two respective DoubleAnimations.
Storyboard.SetTargetProperty(myDoubleAnimation1, new PropertyPath("(Canvas.Left)"));
Storyboard.SetTargetProperty(myDoubleAnimation2, new PropertyPath("(Canvas.Top)"));
myDoubleAnimation1.To = 200;
myDoubleAnimation2.To = 40;
// Make the Storyboard a resource.
LayoutRoot.Resources.Add("unique_id", sb);
// Begin the animation.
sb.Begin();
好的,我正在使用Silverlight的示例。
我在这里找到了C#UWP示例:
故事板类 ,现在可以使用,但是它更改矩形的位置而不是宽度。 如何更改要应用于Rectangle的Width属性的过渡?
新代码如下:
private void Create_And_Run_Animation()
{
// Create a red rectangle that will be the target
// of the animation.
Rectangle myRectangle = new Rectangle();
myRectangle.Width = 20;
myRectangle.Height = 20;
SolidColorBrush myBrush = new SolidColorBrush(Colors.Yellow);
myRectangle.Fill = myBrush;
// Create the transform
TranslateTransform stretchTransform = new TranslateTransform();
stretchTransform.X = 0;
stretchTransform.Y = 0;
myRectangle.RenderTransform = stretchTransform;
// Add the rectangle to the tree.
InfoGrid.Children.Add(myRectangle);
myRectangle.Name = "myWidthAnimatedRectangle";
// Create a duration of 2 seconds.
Duration duration = new Duration(TimeSpan.FromSeconds(2));
// Create two DoubleAnimations and set their properties.
DoubleAnimation myDoubleAnimation = new DoubleAnimation();
myDoubleAnimation.From = 200;
myDoubleAnimation.To = 300;
myDoubleAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(3000));
Storyboard justintimeStoryboard = new Storyboard();
justintimeStoryboard.Duration = duration;
justintimeStoryboard.Children.Add(myDoubleAnimation);
Storyboard.SetTarget(myDoubleAnimation, stretchTransform);
Storyboard.SetTargetName(myDoubleAnimation, myRectangle.Name);
Storyboard.SetTargetProperty(myDoubleAnimation, new PropertyPath(Rectangle.WidthProperty));
// Set the X and Y properties of the Transform to be the target properties
// of the two respective DoubleAnimations.
Storyboard.SetTargetProperty(myDoubleAnimation, "X");
myDoubleAnimation.To = 200;
// Make the Storyboard a resource.
InfoGrid.Resources.Add("justintimeStoryboard", justintimeStoryboard);
// Begin the animation.
justintimeStoryboard.Begin();
}
但是我无法在UWP中获得Rectangle.WidthProperty。 Intelli说:
无法从“ Windows.UI.Xaml.DependencyProperty”转换为“字符串”
我在MSDN上找不到资源。
无法从“ Windows.UI.Xaml.DependencyProperty”转换为“字符串”
问题是SetTargetProperty
方法的Path
参数是字符串值。 您无法将PropertyPath
传递给它。 您只需要传递Width
字符串值。
DoubleAnimation myDoubleAnimation = new DoubleAnimation();
myDoubleAnimation.From = 20;
myDoubleAnimation.To = 300;
myDoubleAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(3000));
Storyboard.SetTarget(myDoubleAnimation, myRectangle);
Storyboard.SetTargetProperty(myDoubleAnimation, "Width");
Storyboard.SetTargetName(myDoubleAnimation, myRectangle.Name);
如果使用以下代码为属性设置动画,则不会看到任何效果。 因为您制作了一个依赖动画 。 默认情况下,动画系统不会运行从属动画。 您仍然可以使用此动画,但是必须专门启用每个此类从属动画。 要启用动画,请将动画对象的EnableDependentAnimation
属性设置为true。
myDoubleAnimation.EnableDependentAnimation = true;
有关更多信息,请参阅情节提要动画官方文档。
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