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