在silverlight中有三種樣式：一個是在本控件設置樣式一個是在UserControl.Resources設置樣式，最後一個是在App.xaml中設置樣式
1.在本控件設置樣式：
代碼：
<Canvas Height="100" Background="Yellow" HorizontalAlignment="Left" Margin="66,93,0,0" Name="canvas1" VerticalAlignment="Top" Width="60" />
2.在UserControl.Resources設置樣式
<UserControl.Resources>
<Style x:Key="canvasstyle" TargetType="Canvas">
<Setter Property="Background" Value="Blue"/>
</Style>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White">
<Canvas Height="100" Background="Yellow" HorizontalAlignment="Left" Margin="66,93,0,0" Name="canvas1" VerticalAlignment="Top" Width="60" />
<Canvas Height="100" Style="{StaticResource canvasstyle}" HorizontalAlignment="Left" Margin="201,98,0,0" Name="canvas2" VerticalAlignment="Top" Width="87" />
<Canvas Height="100" Style="{StaticResource canvasstyle}" HorizontalAlignment="Left" Margin="57,12,0,0" Name="canvas3" VerticalAlignment="Top" Width="200" />
</Grid>
在這裏有的人會想，我想要設置每個控件的顏色，不是要每個都這隻一遍？有沒有辦法一個樣式設置所有相同的控件？ 答案是有的。這個只需要把樣式的x:Key="canvasstyle" 拿掉就行了 如下代碼：
<UserControl.Resources>
<Style TargetType="Canvas">
<Setter Property="Background" Value="Blue"/>
</Style>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White">
<Canvas Height="100" Background="Yellow" HorizontalAlignment="Left" Margin="66,93,0,0" Name="canvas1" VerticalAlignment="Top" Width="60" />
<Canvas Height="100" HorizontalAlignment="Left" Margin="201,98,0,0" Name="canvas2" VerticalAlignment="Top" Width="87" />
<Canvas Height="100" HorizontalAlignment="Left" Margin="57,12,0,0" Name="canvas3" VerticalAlignment="Top" Width="200" />
</Grid>
3.在App.xaml中設置樣式
只需要把剛纔寫的樣式放在裏面就行了
<Application.Resources>
<Style TargetType="Canvas" >
<Setter Property="Background" Value="Blue"/>
</Style>
</Application.Resources>