在windows phone 8中，只有ProgressBar的控件，而没有圆环形的等待控件。今天我突发奇想，从Windows Store 的ProgressRing控件上copy下来的XAML 代码稍微修改一下就可以直接用了。
下面分享给大家，希望能有所帮助，
首先，在XAML 加入引用空间
xmlns:System="clr-namespace:System;assembly=mscorlib"
然后，
<Style x:Key="ProgressRingStyle" TargetType="ProgressBar">
<Setter Property="Foreground" Value="{StaticResource PhoneAccentBrush}"/>
<Setter Property="Background" Value="{StaticResource PhoneProgressBarBackgroundBrush}"/>
<Setter Property="Maximum" Value="100"/>
<Setter Property="IsHitTestVisible" Value="False"/>
<Setter Property="Padding" Value="{StaticResource PhoneHorizontalMargin}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ProgressBar">
<Grid>
<Grid.Resources>
<System:Double x:Key="ProgressRingEllipseDiameter">5</System:Double>
<Thickness x:Key="ProgressRingEllipseOffset">0</Thickness>
<Style x:Key="ProgressRingEllipseStyle" TargetType="Ellipse">
<Setter Property="Opacity" Value="0" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Top" />
</Style>
</Grid.Resources>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Determinate"/>
<VisualState x:Name="Indeterminate">
<Storyboard RepeatBehavior="Forever">
<ObjectAnimationUsingKeyFrames Duration="0"
Storyboard.TargetName="Ring"
Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E1"
Storyboard.TargetProperty="Opacity"
BeginTime="0">
<DiscreteDoubleKeyFrame KeyTime="0" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.21" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.22" Value="0" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.47" Value="0" />
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E2"
Storyboard.TargetProperty="Opacity"
BeginTime="00:00:00.167">
<DiscreteDoubleKeyFrame KeyTime="0" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.21" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.22" Value="0" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.47" Value="0" />
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E3"
Storyboard.TargetProperty="Opacity"
BeginTime="00:00:00.334">
<DiscreteDoubleKeyFrame KeyTime="0" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.21" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.22" Value="0" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.47" Value="0" />
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E4"
Storyboard.TargetProperty="Opacity"
BeginTime="00:00:00.501">
<DiscreteDoubleKeyFrame KeyTime="0" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.21" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.22" Value="0" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.47" Value="0" />
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E5"
Storyboard.TargetProperty="Opacity"
BeginTime="00:00:00.668">
<DiscreteDoubleKeyFrame KeyTime="0" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.21" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.22" Value="0" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.47" Value="0" />
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E6"
Storyboard.TargetProperty="Opacity"
BeginTime="00:00:00.835">
<DiscreteDoubleKeyFrame KeyTime="0" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.21" Value="1" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.22" Value="0" />
<DiscreteDoubleKeyFrame KeyTime="0:0:3.47" Value="0" />
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E1R"
BeginTime="0"
Storyboard.TargetProperty="Angle">
<SplineDoubleKeyFrame KeyTime="0" Value="-110" KeySpline="0.13,0.21,0.1,0.7"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.433" Value="10" KeySpline="0.02,0.33,0.38,0.77"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.2" Value="93"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.617" Value="205" KeySpline="0.57,0.17,0.95,0.75"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.017" Value="357" KeySpline="0,0.19,0.07,0.72"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="439"/>
<SplineDoubleKeyFrame KeyTime="0:0:3.217" Value="585" KeySpline="0,0,0.95,0.37"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E2R"
BeginTime="00:00:00.167"
Storyboard.TargetProperty="Angle">
<SplineDoubleKeyFrame KeyTime="0" Value="-116" KeySpline="0.13,0.21,0.1,0.7"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.433" Value="4" KeySpline="0.02,0.33,0.38,0.77"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.2" Value="87"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.617" Value="199" KeySpline="0.57,0.17,0.95,0.75"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.017" Value="351" KeySpline="0,0.19,0.07,0.72"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="433"/>
<SplineDoubleKeyFrame KeyTime="0:0:3.217" Value="579" KeySpline="0,0,0.95,0.37"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E3R"
BeginTime="00:00:00.334"
Storyboard.TargetProperty="Angle">
<SplineDoubleKeyFrame KeyTime="0" Value="-122" KeySpline="0.13,0.21,0.1,0.7"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.433" Value="-2" KeySpline="0.02,0.33,0.38,0.77"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.2" Value="81"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.617" Value="193" KeySpline="0.57,0.17,0.95,0.75"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.017" Value="345" KeySpline="0,0.19,0.07,0.72"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="427"/>
<SplineDoubleKeyFrame KeyTime="0:0:3.217" Value="573" KeySpline="0,0,0.95,0.37"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E4R"
BeginTime="00:00:00.501"
Storyboard.TargetProperty="Angle">
<SplineDoubleKeyFrame KeyTime="0" Value="-128" KeySpline="0.13,0.21,0.1,0.7"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.433" Value="-8" KeySpline="0.02,0.33,0.38,0.77"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.2" Value="75"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.617" Value="187" KeySpline="0.57,0.17,0.95,0.75"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.017" Value="339" KeySpline="0,0.19,0.07,0.72"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="421"/>
<SplineDoubleKeyFrame KeyTime="0:0:3.217" Value="567" KeySpline="0,0,0.95,0.37"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E5R"
BeginTime="00:00:00.668"
Storyboard.TargetProperty="Angle">
<SplineDoubleKeyFrame KeyTime="0" Value="-134" KeySpline="0.13,0.21,0.1,0.7"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.433" Value="-14" KeySpline="0.02,0.33,0.38,0.77"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.2" Value="69"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.617" Value="181" KeySpline="0.57,0.17,0.95,0.75"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.017" Value="331" KeySpline="0,0.19,0.07,0.72"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="415"/>
<SplineDoubleKeyFrame KeyTime="0:0:3.217" Value="561" KeySpline="0,0,0.95,0.37"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="E6R"
BeginTime="00:00:00.835"
Storyboard.TargetProperty="Angle">
<SplineDoubleKeyFrame KeyTime="0" Value="-140" KeySpline="0.13,0.21,0.1,0.7"/>
<SplineDoubleKeyFrame KeyTime="0:0:0.433" Value="-20" KeySpline="0.02,0.33,0.38,0.77"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.2" Value="63"/>
<SplineDoubleKeyFrame KeyTime="0:0:1.617" Value="175" KeySpline="0.57,0.17,0.95,0.75"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.017" Value="325" KeySpline="0,0.19,0.07,0.72"/>
<SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="409"/>
<SplineDoubleKeyFrame KeyTime="0:0:3.217" Value="555" KeySpline="0,0,0.95,0.37"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid x:Name="Ring"
Margin="{TemplateBinding Padding}" Visibility="Collapsed"
RenderTransformOrigin=".5,.5"
FlowDirection="LeftToRight">
<Canvas RenderTransformOrigin=".5,.5">
<Canvas.RenderTransform>
<RotateTransform x:Name="E1R" />
</Canvas.RenderTransform>
<Ellipse
x:Name="E1"
Style="{StaticResource ProgressRingEllipseStyle}"
Width="{StaticResource ProgressRingEllipseDiameter}"
Height="{StaticResource ProgressRingEllipseDiameter}"
Margin="{StaticResource ProgressRingEllipseOffset}"
Fill="{TemplateBinding Foreground}"/>
</Canvas>
<Canvas RenderTransformOrigin=".5,.5">
<Canvas.RenderTransform>
<RotateTransform x:Name="E2R" />
</Canvas.RenderTransform>
<Ellipse
x:Name="E2"
Style="{StaticResource ProgressRingEllipseStyle}"
Width="{StaticResource ProgressRingEllipseDiameter}"
Height="{StaticResource ProgressRingEllipseDiameter}"
Margin="{StaticResource ProgressRingEllipseOffset}"
Fill="{TemplateBinding Foreground}"/>
</Canvas>
<Canvas RenderTransformOrigin=".5,.5">
<Canvas.RenderTransform>
<RotateTransform x:Name="E3R" />
</Canvas.RenderTransform>
<Ellipse
x:Name="E3"
Style="{StaticResource ProgressRingEllipseStyle}"
Width="{StaticResource ProgressRingEllipseDiameter}"
Height="{StaticResource ProgressRingEllipseDiameter}"
Margin="{StaticResource ProgressRingEllipseOffset}"
Fill="{TemplateBinding Foreground}"/>
</Canvas>
<Canvas RenderTransformOrigin=".5,.5">
<Canvas.RenderTransform>
<RotateTransform x:Name="E4R" />
</Canvas.RenderTransform>
<Ellipse
x:Name="E4"
Style="{StaticResource ProgressRingEllipseStyle}"
Width="{StaticResource ProgressRingEllipseDiameter}"
Height="{StaticResource ProgressRingEllipseDiameter}"
Margin="{StaticResource ProgressRingEllipseOffset}"
Fill="{TemplateBinding Foreground}"/>
</Canvas>
<Canvas RenderTransformOrigin=".5,.5">
<Canvas.RenderTransform>
<RotateTransform x:Name="E5R" />
</Canvas.RenderTransform>
<Ellipse
x:Name="E5"
Style="{StaticResource ProgressRingEllipseStyle}"
Width="{StaticResource ProgressRingEllipseDiameter}"
Height="{StaticResource ProgressRingEllipseDiameter}"
Margin="{StaticResource ProgressRingEllipseOffset}"
Fill="{TemplateBinding Foreground}"/>
</Canvas>
<Canvas RenderTransformOrigin=".5,.5"
Visibility="Collapsed"
x:Name="SixthCircle">
<Canvas.RenderTransform>
<RotateTransform x:Name="E6R" />
</Canvas.RenderTransform>
<Ellipse
x:Name="E6"
Style="{StaticResource ProgressRingEllipseStyle}"
Width="{StaticResource ProgressRingEllipseDiameter}"
Height="{StaticResource ProgressRingEllipseDiameter}"
Margin="{StaticResource ProgressRingEllipseOffset}"
Fill="{TemplateBinding Foreground}"/>
</Canvas>
</Grid>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
ProgressRingEllipseDiameter 是用来调节小圆圈直径的
ProgressRingEllipseOffset 是调节小圆圈的margin
这两个属性在Windows Store里面是根据控件大小自动调节的