wpf动画之后不能定位？

Question

例：button1.Margin = new Thickness(0); 可正常定位对象坐标。但如果button1用 ThicknessAnimation 动画之后，上面代码就没反应

Answer 1

这里有个简单的例子using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;namespace CodeCreateDrawing
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        DrawingVisual ghostVisual;
        public Window1()
        {
            InitializeComponent();            Width = 300;
            Height = 350;
            ghostVisual = new DrawingVisual();
            using (DrawingContext dc = ghostVisual.RenderOpen())
            {                dc.DrawEllipse(Brushes.Black, new Pen(Brushes.White, 10),
                new Point(95, 95), 15, 15);                dc.DrawEllipse(Brushes.Black, new Pen(Brushes.White, 10),
                new Point(170, 105), 15, 15);                Pen p = new Pen(Brushes.Black, 10);
                p.StartLineCap = PenLineCap.Round;
                p.EndLineCap = PenLineCap.Round;
                dc.DrawLine(p, new Point(75, 160), new Point(175, 150));
            }
            AddVisualChild(ghostVisual);
            AddLogicalChild(ghostVisual);
        }
        protected override int VisualChildrenCount
        {
            get { return 1; }
        }
        protected override Visual GetVisualChild(int index)
        {
            if (index != 0)
                throw new ArgumentOutOfRangeException("index");
            return ghostVisual;
        }
    }
}
这个例子里面生成一个DrawingVisual，并把它加到Window中。更多的关于 Drawing Objects Overview我们同样可以用代码生成 ShapeShape是另外一种画图的方法。Shape是UIElement,支持高级特性，但消耗更多的资源。 using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;namespace CodeGenerateShape
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            System.Windows.Shapes.Rectangle rec = new Rectangle();            // the width and height can from data source
            rec.Width = 100;
            rec.Height = 50;
            rec.Stroke = Brushes.SkyBlue;            Canvas.SetTop(rec, 20);            Canvas.SetLeft(rec, 10);            canvas2DContainer.Children.Add(rec);
            System.Windows.Shapes.Path myPath = new Path();
            myPath.Stroke = System.Windows.Media.Brushes.Black;
            myPath.Fill = System.Windows.Media.Brushes.MediumSlateBlue;
            myPath.StrokeThickness = 4;
            myPath.HorizontalAlignment = HorizontalAlignment.Left;
            myPath.VerticalAlignment = VerticalAlignment.Center;
            EllipseGeometry myEllipseGeometry = new EllipseGeometry();
            myEllipseGeometry.Center = new System.Windows.Point(50, 50);
            myEllipseGeometry.RadiusX = 25;
            myEllipseGeometry.RadiusY = 25;
            myPath.Data = myEllipseGeometry;            canvas2DContainer.Children.Add(myPath);
        }
    }
}
<Window x:Class="CodeGenerateShape.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300" Loaded="Window_Loaded">
    <Grid>
        <Canvas Name="canvas2DContainer">
            
        </Canvas>
    </Grid>
</Window>
跟多的Shape：          Shapes and Basic Drawing in WPF Overview
Shapes How-to Topics
   用wpf动态绘图，需要些什么启示？gdi绘图是通过重载onpaint，wpf不需要如此，那我怎么确保刷新的时候，能重绘或不重绘我的图形？3D情况下，如何动态绘制多重折线或动态生成几何图形。    这个简单的说，就是，你的Visual对象是可见的时候，WPF会负责不停的重绘，比如上面的例子里面的  Shape    3D模型的情况下，根据你设定的模型，光源，照相机等，不停的显示给你照相机拍到的画面。当然你不改变这些东西的话，你看到的是静止的画面  你可以添加动态到这些东西上去，表现动态的画面。比如移动照相机机。

Answer 2

看这里
http://www.cnblogs.com/alamiye010/archive/2009/08/26/1554539.html