效果：

代码：

1   <UserControl x:Class="ShineDraw.Controls.LoadingAnimation" 
2       xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
3       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
4       Width="400" Height="400" > 
5       <UserControl.Resources> 
6           <Storyboard x:Name="Rotation" RepeatBehavior="Forever"> 
7               <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[2].(RotateTransform.Angle)"> 
8                   <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0"/> 
9                   <SplineDoubleKeyFrame KeyTime="00:00:00.2000000" Value="0"/> 
10                  <SplineDoubleKeyFrame KeyTime="00:00:00.2000000" Value="45"/> 
11                  <SplineDoubleKeyFrame KeyTime="00:00:00.4000000" Value="45"/> 
12                  <SplineDoubleKeyFrame KeyTime="00:00:00.4000000" Value="90"/> 
13                  <SplineDoubleKeyFrame KeyTime="00:00:00.6000000" Value="90"/> 
14                  <SplineDoubleKeyFrame KeyTime="00:00:00.6000000" Value="135"/> 
15                  <SplineDoubleKeyFrame KeyTime="00:00:00.8000000" Value="135"/> 
16                  <SplineDoubleKeyFrame KeyTime="00:00:00.8000000" Value="180"/> 
17                  <SplineDoubleKeyFrame KeyTime="00:00:01.0000000" Value="180"/> 
18                  <SplineDoubleKeyFrame KeyTime="00:00:01.0000000" Value="225"/> 
19                  <SplineDoubleKeyFrame KeyTime="00:00:01.2000000" Value="225"/> 
20                  <SplineDoubleKeyFrame KeyTime="00:00:01.2000000" Value="270"/> 
21                  <SplineDoubleKeyFrame KeyTime="00:00:01.4000000" Value="270"/> 
22                  <SplineDoubleKeyFrame KeyTime="00:00:01.4000000" Value="315"/> 
23                  <SplineDoubleKeyFrame KeyTime="00:00:01.6000000" Value="315"/> 
24              </DoubleAnimationUsingKeyFrames> 
25          </Storyboard> 
26      </UserControl.Resources> 
27  
28      <Grid x:Name="LayoutRoot" Background="Transparent" RenderTransformOrigin="0.5,0.5"> 
29          <Grid.RenderTransform> 
30              <TransformGroup> 
31                  <ScaleTransform/> 
32                  <SkewTransform/> 
33                  <RotateTransform/> 
34                  <TranslateTransform/> 
35              </TransformGroup> 
36          </Grid.RenderTransform> 
37          <Ellipse Width="100" Height="100" Fill="#FF000000" > 
38              <Ellipse.RenderTransform> 
39                  <TransformGroup> 
40                      <ScaleTransform/> 
41                      <SkewTransform/> 
42                      <RotateTransform/> 
43                      <TranslateTransform X="-150"/> 
44                  </TransformGroup> 
45              </Ellipse.RenderTransform> 
46          </Ellipse> 
47          <Ellipse Width="100" Height="100" Fill="#FFAAAAAA" > 
48              <Ellipse.RenderTransform> 
49                  <TransformGroup> 
50                      <ScaleTransform/> 
51                      <SkewTransform/> 
52                      <RotateTransform Angle="45" CenterX="200" CenterY="50"/> 
53                      <TranslateTransform X="-150"/> 
54                  </TransformGroup> 
55              </Ellipse.RenderTransform> 
56          </Ellipse> 
57          <Ellipse Width="100" Height="100" Fill="#FFAAAAAA"  > 
58              <Ellipse.RenderTransform> 
59                  <TransformGroup> 
60                      <ScaleTransform/> 
61                      <SkewTransform/> 
62                      <RotateTransform Angle="90" CenterX="200" CenterY="50"/> 
63                      <TranslateTransform X="-150"/> 
64                  </TransformGroup> 
65              </Ellipse.RenderTransform> 
66          </Ellipse> 
67          <Ellipse Width="100" Height="100" Fill="#FFAAAAAA"  > 
68              <Ellipse.RenderTransform> 
69                  <TransformGroup> 
70                      <ScaleTransform/> 
71                      <SkewTransform/> 
72                      <RotateTransform Angle="135" CenterX="200" CenterY="50"/> 
73                      <TranslateTransform X="-150"/> 
74                  </TransformGroup> 
75              </Ellipse.RenderTransform> 
76          </Ellipse> 
77          <Ellipse Width="100" Height="100" Fill="#FF999999"  > 
78              <Ellipse.RenderTransform> 
79                  <TransformGroup> 
80                      <ScaleTransform/> 
81                      <SkewTransform/> 
82                      <RotateTransform Angle="180" CenterX="200" CenterY="50"/> 
83                      <TranslateTransform X="-150"/> 
84                  </TransformGroup> 
85              </Ellipse.RenderTransform> 
86          </Ellipse> 
87          <Ellipse Width="100" Height="100" Fill="#FF777777" > 
88              <Ellipse.RenderTransform> 
89                  <TransformGroup> 
90                      <ScaleTransform/> 
91                      <SkewTransform/> 
92                      <RotateTransform Angle="225" CenterX="200" CenterY="50"/> 
93                      <TranslateTransform X="-150"/> 
94                  </TransformGroup> 
95              </Ellipse.RenderTransform> 
96          </Ellipse> 
97          <Ellipse Width="100" Height="100" Fill="#FF555555"  > 
98              <Ellipse.RenderTransform> 
99                  <TransformGroup> 
100                     <ScaleTransform/> 
101                     <SkewTransform/> 
102                     <RotateTransform Angle="270" CenterX="200" CenterY="50"/> 
103                     <TranslateTransform X="-150"/> 
104                 </TransformGroup> 
105             </Ellipse.RenderTransform> 
106         </Ellipse> 
107         <Ellipse Width="100" Height="100" Fill="#FF333333"  > 
108             <Ellipse.RenderTransform> 
109                 <TransformGroup> 
110                     <ScaleTransform/> 
111                     <SkewTransform/> 
112                     <RotateTransform Angle="315" CenterX="200" CenterY="50"/> 
113                     <TranslateTransform X="-150"/> 
114                 </TransformGroup> 
115             </Ellipse.RenderTransform> 
116         </Ellipse> 
117     </Grid> 
118 </UserControl> 
119