故事板打靶多个对象，使用SetTarget方法，不能正常工作 [英] Storyboard targetting multiple objects, using SetTarget method, doesn't work

问题描述

谁能帮我试图找出为什么这是行不通的。

Can anyone help me trying to find out why this doesn't work.

刷子变量包含刷的pre填充列表。 如果我尝试了迭代过程中应用 BeginAnimation 直接，它工作正常。但是有一个很大的开销分别启动每个动画...

The brushes variable contains a pre-filled list of brushes. If I try to apply the BeginAnimation directly during the iteration, it works fine. But has a great overhead starting each animation separately...

所以，我试图把在一个单一的故事板所有的动画，并解雇他们一下子...

So I was trying to put all the animations in a single storyboard, and fire them all at once...

var storyBoard = new Storyboard();           
var duration = new Duration(TimeSpan.FromMilliseconds(time));
foreach (Brush brush in brushes) 
{
    var animation = new DoubleAnimation(toValue, duration);

    storyBoard.Children.Add(animation);

    Storyboard.SetTargetProperty(animation, new PropertyPath(Brush.OpacityProperty));
    Storyboard.SetTarget(animation, brush);
}

storyBoard.Begin();

这code根本不做任何事（我可以看到... ...）。

This code simply does nothing (that I can see...).

谢谢！

编辑：还不能确定是什么问题与SetTarget方法，无论是一个错误或我只是不使用，因为它应该是。无论如何，我解决了这个问题对我的画笔在运行时生成唯一的名称，并使用SetTargetName方法。

Still not sure of what is problem with the SetTarget method, either a bug or I'm just not using as it should be. Anyway I solved the problem generating unique names for my brushes at runtime and using the SetTargetName method.

再次感谢所有的建议。

推荐答案

尝试使用<一个href="http://msdn.microsoft.com/enus/library/system.windows.media.animation.storyboard.settargetname.aspx"相对=nofollow> Storyboard.SettargetName 方法，而不是 Storyboard.SetTarget 。我prepared工作的样品给你：

Try to use Storyboard.SettargetName method instead of Storyboard.SetTarget. I prepared working sample for you:

var brushes = new string[] { "br1", "br2", "br3" };
var sb = new Storyboard();
var dur = new Duration(TimeSpan.FromMilliseconds(500.0));
double toValue = 1.0;

foreach (var brush in brushes)
{
  var anim = new DoubleAnimation(toValue, dur);
  Storyboard.SetTargetName(anim, brush);
  Storyboard.SetTargetProperty(anim, new PropertyPath("(0)", new DependencyProperty[] { Brush.OpacityProperty }));
  sb.Children.Add(anim);
}         

sb.Begin(this);

请记住，在这种情况下，你也应该设定一个名称范围作为参数 Storyboard.Begin 方法。

另请参见：<一href="http://stackoverflow.com/questions/2338714/why-dont-these-animations-work-when-im-using-a-storyboard">Another答案在＃1 。

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