wpf中这个简单的位置动画怎样用c#实现？

[wyman25]

很简单一个动画，就是位移而已，要求用一个DoubleAnimationUsingKeyFrames，用一个TranslateTransform，并且全部用c#实现。
网上wpf相关资料都是在xaml里面实现的，但我现在只能用c#动态来实现，请各位帮帮忙。特别是Storyboard.SetTargetProperty(XOffsetAnimation, new PropertyPath());
中，new PropertyPath()怎么对应到这个TranslateTransform

[wyman25]

up下

[voodoo82]

给你一个Sample，把一个Rectangle水平移动200。

XAML:
---------------------------------------------------------------------------------------------------------------------
[code=XAML]
<Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication1"
Title="Animation Demo" Height="270" Width="480">
<Canvas>
<Canvas.Triggers>
<EventTrigger RoutedEvent="Canvas.Loaded">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard TargetName="rect" TargetProperty="RenderTransform.X">
<DoubleAnimationUsingKeyFrames Duration="0:0:2" >
<LinearDoubleKeyFrame KeyTime="0:0:0" Value="0" />
<LinearDoubleKeyFrame KeyTime="0:0:2" Value="200" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Canvas.Triggers>
<Rectangle Height="20" Width="20" Name="rect" Canvas.Left="10" Canvas.Top="10">
<Rectangle.Fill>
<SolidColorBrush Color="Red" />
</Rectangle.Fill>
<Rectangle.RenderTransform>
<TranslateTransform X="0" Y="0" />
</Rectangle.RenderTransform>
</Rectangle>
</Canvas>
</Window>
[/code]
---------------------------------------------------------------------------------------------------------------------------

C#实现同样的效果
---------------------------------------------------------------------------------------------------------------------------

public Window1()
{
     InitializeComponent();

     Rectangle rect = new Rectangle();
     rect.Height = 20;
     rect.Width = 20;
     rect.Fill = new SolidColorBrush(Colors.Red);
     rect.RenderTransform = new TranslateTransform(0, 0);

     canvas.Children.Add(rect);

     DoubleAnimationUsingKeyFrames animation = 
          new DoubleAnimationUsingKeyFrames();
     LinearDoubleKeyFrame firstFrame = new LinearDoubleKeyFrame(0, 
          KeyTime.FromPercent(0));
     LinearDoubleKeyFrame secondFrame = new LinearDoubleKeyFrame(200, 
          KeyTime.FromTimeSpan(new TimeSpan(0, 0, 2)));

     animation.KeyFrames.Add(firstFrame);
     animation.KeyFrames.Add(secondFrame);

     TranslateTransform tt = rect.RenderTransform as TranslateTransform;
     tt.BeginAnimation(TranslateTransform.XProperty, animation);
}

--------------------------------------------------------------------------------------------------------------------

[BossFriday]

去看看webcaset里的讲座吧.wpf这玩艺毕竟现在普及率还不是太高.