WPF学习心得(1)：WPF进行动画后不能改变相对应的属性问题的解决

    这几天一直在对原来的WPF应用程序进行改进和重构，准备为应用程序加入一些动画操作，但问题来了！     经由动画改变的属性不能变化了，只能再次通过动画更改。     这也太不爽了吧。搞一两个小时，终于找到了解决的办法。     下面给出主要代码：    

foreach  (UIElement control  in  canvas.Children)             {                //UserControl                RealTimeChartFlexible chartFlexible = (RealTimeChartFlexible)control;                //开始动画                //注册名字（对于UserControl来说很关键的一步，本人试了很久）                chartFlexible.RegisterName("chartFlexible", chartFlexible);                //left                DoubleAnimation leftAni = new DoubleAnimation();                leftAni.To = colNum * pWidth;                leftAni.Duration = new Duration(new TimeSpan(0, 0, 1));                Storyboard.SetTargetName(leftAni, "chartFlexible");                Storyboard.SetTargetProperty(leftAni, new PropertyPath(Canvas.LeftProperty));                //top                DoubleAnimation topAni = new DoubleAnimation();                topAni.To = rowNum * pHeight;                topAni.Duration = new Duration(new TimeSpan(0, 0, 1));                Storyboard.SetTargetName(topAni, "chartFlexible");                Storyboard.SetTargetProperty(topAni, new PropertyPath(Canvas.TopProperty));                //width                DoubleAnimation WidthAni = new DoubleAnimation();                WidthAni.To = pWidth;                WidthAni.Duration = new Duration(new TimeSpan(0, 0, 1));                Storyboard.SetTargetName(WidthAni, "chartFlexible");                Storyboard.SetTargetProperty(WidthAni, new PropertyPath(RealTimeChartFlexible.WidthProperty));                //height                DoubleAnimation HeightAni = new DoubleAnimation();                HeightAni.To = pHeight;                HeightAni.Duration = new Duration(new TimeSpan(0, 0, 1));                Storyboard.SetTargetName(HeightAni, "chartFlexible");                Storyboard.SetTargetProperty(HeightAni, new PropertyPath(RealTimeChartFlexible.HeightProperty));                Storyboard sb = new Storyboard();                sb.Children.Add(leftAni);                sb.Children.Add(topAni);                sb.Children.Add(HeightAni);                sb.Children.Add(WidthAni);                storys.Add(sb);                sb.Completed += new EventHandler(sb_Completed);                sb.Begin(chartFlexible, true);                //chartFlexible.Width = pWidth;                //chartFlexible.Height = pHeight;                chartFlexible.myOriginalWidth = pWidth;                chartFlexible.myOriginalHeight = pHeight;                chartFlexible.myTop = rowNum * pHeight;                chartFlexible.myLeft = colNum * pWidth;                //Canvas.SetLeft(chartFlexible, chartFlexible.myLeft);                //Canvas.SetTop(chartFlexible, chartFlexible.myTop);                rowNum++;                if (rowNum == row)                {                    colNum++;                    rowNum = 0;                }            }

 

 关键就在于Storybroad的Begin方法的第二个参数，可以使动画为可控制，以便动画完成后移除。

void  sb_Completed( object  sender, EventArgs e)         {            int index = 0;            foreach (object control in canvas.Children)            {                RealTimeChartFlexible chartFlexible = (RealTimeChartFlexible)control;                double top = Canvas.GetTop(chartFlexible);                double left = Canvas.GetLeft(chartFlexible);                double height = chartFlexible.Height;                double width = chartFlexible.Width;                storys[index].Remove(chartFlexible);                chartFlexible.Height = height;                chartFlexible.Width = width;                Canvas.SetLeft(chartFlexible, left);                Canvas.SetTop(chartFlexible, top);                index++;            }        }

storys是一个Storyboard的表，执行了Remove方法后UIElement的位置会回到做动画之前，要在执行Remove之前保存位置，呵呵

就这样，问题解决！

如果各位有更好的办法可以留言给我，谢谢！

 

转载于:https://www.cnblogs.com/chenlhuaf/archive/2008/04/01/1133031.html

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