介绍
Silverlight 2.0 画笔：
SolidColorBrush - 单色画笔
ImageBrush - 图像画笔
VideoBrush - 视频画笔
LinearGradientBrush - 线性渐变画笔
RadialGradientBrush - 放射性渐变画笔
示例
1、SolidColorBrush.xaml
<UserControl x:Class="Silverlight20.Brush.SolidColorBrush"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<StackPanel HorizontalAlignment="Left">
<Ellipse Margin="10" Width="200" Height="100" Stroke="Yellow" StrokeThickness="3">
<Ellipse.Fill>
<!--SolidColorBrush - 单色画笔-->
<!--
Color - 颜色
格式如下：
预定义的Color的名称。如：Red, Green, Blue
#RGB。如：#F00
#ARGB（A为Alpha值）。如：#FF00, #F0F0, #F00F
#RGB。如：#FF0000, #00FF00, #0000FF
#ARGB（A为Alpha值）。如：#FFFF0000, #FF00FF00, #FF0000FF
Opacity - 不透明度。0 - 1之间
-->
<SolidColorBrush Color="#FF0000" Opacity="0.5" />
</Ellipse.Fill>
</Ellipse>
<Ellipse Margin="10" Width="200" Height="100" Stroke="Yellow" StrokeThickness="3">
<Ellipse.Fill>
<SolidColorBrush Color="#88FF0000" />
</Ellipse.Fill>
</Ellipse>
</StackPanel>
</UserControl>
2、ImageBrush.xaml
<UserControl x:Class="Silverlight20.Brush.ImageBrush"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<StackPanel HorizontalAlignment="Left">
<Rectangle Width="100" Height="100" Stroke="Red" StrokeThickness="1">
<Rectangle.Fill>
<!--ImageBrush - 图像画笔-->
<!--
ImageSource - 图片地址
Stretch属性 - 拉伸值 [System.Windows.Media.Stretch 枚举]。参见：本Demo的Shape/Shape.xaml
AlignmentX - 水平方向的对齐方式。Center（默认值）, Left, Right
AlignmentY - 垂直方向的对齐方式。Center（默认值）, Top, Bottom
-->
<ImageBrush ImageSource="/Silverlight20;component/Images/Logo.jpg" AlignmentX="Right" AlignmentY="Bottom" Stretch="None" />
</Rectangle.Fill>
</Rectangle>
</StackPanel>
</UserControl>
3、VideoBrush.xaml
<UserControl x:Class="Silverlight20.Brush.VideoBrush"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<StackPanel HorizontalAlignment="Left">
<MediaElement x:Name="mediaElement" Source="/Silverlight20;component/Video/Demo.wmv" Width="0" Height="0" />
<Rectangle Width="300" Height="100">
<Rectangle.Fill>
<!--VideoBrush - 视频画笔-->
<!--
SourceName - 相关的 MediaElement 的名称
Stretch属性 - 拉伸值 [System.Windows.Media.Stretch 枚举]。参见：本Demo的Shape/Shape.xaml
AlignmentX - 水平方向的对齐方式。Center（默认值）, Left, Right
AlignmentY - 垂直方向的对齐方式。Center（默认值）, Top, Bottom
-->
<VideoBrush SourceName="mediaElement" />
</Rectangle.Fill>
</Rectangle>
</StackPanel>
</UserControl>
4、LinearGradientBrush.xaml
<UserControl x:Class="Silverlight20.Brush.LinearGradientBrush"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<StackPanel HorizontalAlignment="Left">
<Grid Margin="10">
<Rectangle Width="200" Height="100" HorizontalAlignment="Left">
<Rectangle.Fill>
<!--LinearGradientBrush - 线性渐变画笔-->
<!--
StartPoint - 线性渐变的起点。默认渐变方向为对角线方向，默认值为左上角0,0
EndPoint - 线性渐变的终点。默认渐变方向为对角线方向，默认值为右下角1,1
GradientStop - 渐变中，过渡点的设置
GradientStop.Color - 过渡点的颜色
GradientStop.Offset - 过渡点的位置。相对于渐变线的比值。最小值0.0（默认值），最大值1.0
ColorInterpolationMode - 插入渐变颜色的方式 [System.Windows.Media.ColorInterpolationMode枚举]
ColorInterpolationMode.ScRgbLinearInterpolation - scRGB
ColorInterpolationMode.SRgbLinearInterpolation - sRGB。默认值
-->
<LinearGradientBrush StartPoint="0,0" EndPoint="1,1" ColorInterpolationMode="SRgbLinearInterpolation">
<GradientStop Color="Red" Offset="0.0" />
<GradientStop Color="Green" Offset="0.25" />
<GradientStop Color="Blue" Offset="0.75" />
<GradientStop Color="Yellow" Offset="1.0" />
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Line X1="0" Y1="0" X2="200" Y2="100" Stroke="Black" HorizontalAlignment="Left" />
</Grid>
<Grid Margin="10">
<Rectangle Width="200" Height="100" HorizontalAlignment="Left">
<Rectangle.Fill>
<!--
MappingMode - 指定线性渐变的起点（StartPoint）和终点（EndPoint）相对于输出区域是相对的还是绝对的 [System.Windows.Media.BrushMappingMode枚举]
MappingMode.RelativeToBoundingBox - 相对坐标。默认值
MappingMode.Absolute - 绝对坐标
-->
<LinearGradientBrush StartPoint="0,0" EndPoint="200,100" MappingMode="Absolute">
<GradientStop Color="Red" Offset="0.0" />
<GradientStop Color="Green" Offset="0.25" />
<GradientStop Color="Blue" Offset="0.75" />
<GradientStop Color="Yellow" Offset="1.0" />
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Line X1="0" Y1="0" X2="200" Y2="100" Stroke="Black" HorizontalAlignment="Left" />
</Grid>
<Grid Margin="10">
<Rectangle Width="200" Height="100" HorizontalAlignment="Left">
<Rectangle.Fill>
<!--
SpreadMethod - 线性渐变线（黑色线）之外， 输出区域之内的渐变方式 [System.Windows.Media.GradientSpreadMethod枚举]
GradientSpreadMethod.Pad - 用线性渐变线末端的颜色值填充剩余空间。默认值
-->
<LinearGradientBrush StartPoint="0.4,0.5" EndPoint="0.6,0.5" SpreadMethod="Pad">
<GradientStop Color="Red" Offset="0.0" />
<GradientStop Color="Green" Offset="1.0" />
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Line X1="80" Y1="50" X2="120" Y2="50" Stroke="Black" HorizontalAlignment="Left" />
</Grid>
<Grid Margin="10">
<Rectangle Width="200" Height="100" HorizontalAlignment="Left">
<Rectangle.Fill>
<!--
SpreadMethod - 线性渐变线（黑色线）之外， 输出区域之内的渐变方式 [System.Windows.Media.GradientSpreadMethod枚举]
GradientSpreadMethod.Reflect - 相邻填充区域，以 相反方向 重复渐变，直至填充满整个剩余空间
-->
<LinearGradientBrush StartPoint="0.4,0.5" EndPoint="0.6,0.5" SpreadMethod="Reflect">
<GradientStop Color="Red" Offset="0.0" />
<GradientStop Color="Green" Offset="1.0" />
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Line X1="80" Y1="50" X2="120" Y2="50" Stroke="Black" HorizontalAlignment="Left" />
</Grid>
<Grid Margin="10">
<Rectangle Width="200" Height="100" HorizontalAlignment="Left">
<Rectangle.Fill>
<!--
SpreadMethod - 线性渐变线（黑色线）之外， 输出区域之内的渐变方式 [System.Windows.Media.GradientSpreadMethod枚举]
GradientSpreadMethod.Repeat - 相邻填充区域，以 相同方向 重复渐变，直至填充满整个剩余空间
-->
<LinearGradientBrush StartPoint="0.4,0.5" EndPoint="0.6,0.5" SpreadMethod="Repeat">
<GradientStop Color="Red" Offset="0.0" />
<GradientStop Color="Green" Offset="1.0" />
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Line X1="80" Y1="50" X2="120" Y2="50" Stroke="Black" HorizontalAlignment="Left" />
</Grid>
</StackPanel>
</UserControl>
5、RadialGradientBrush.xaml
<UserControl x:Class="Silverlight20.Brush.RadialGradientBrush"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<StackPanel HorizontalAlignment="Left">
<Grid Margin="10">
<Rectangle Width="200" Height="100" HorizontalAlignment="Left" VerticalAlignment="Top">
<Rectangle.Fill>
<!--LinearGradientBrush - 放射性渐变画笔-->
<!--
GradientOrigin - 放射性渐变的 放射源的 原点坐标。默认值0.5,0.5
Center - 放射性渐变的 填充范围（红色圆圈部分）的 原点坐标。默认值0.5,0.5
GradientStop - 渐变中，过渡点的设置。参见：Brush/LinearGradientBrush.xaml
ColorInterpolationMode - 插入渐变颜色的方式 [System.Windows.Media.ColorInterpolationMode枚举]。参见：Brush/LinearGradientBrush.xaml
SpreadMethod - 线性渐变线之外， 输出区域之内的渐变方式 [System.Windows.Media.GradientSpreadMethod枚举]。。参见：Brush/LinearGradientBrush.xaml
-->
<RadialGradientBrush GradientOrigin="0.5,0.5" Center="0.5,0.5">
<GradientStop Color="Red" Offset="0.0" />
<GradientStop Color="Green" Offset="0.25" />
<GradientStop Color="Blue" Offset="0.75" />
<GradientStop Color="Yellow" Offset="1.0" />
</RadialGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Path Stroke="Red" StrokeThickness="1" HorizontalAlignment="Left" VerticalAlignment="Top">
<Path.Data>
<EllipseGeometry Center="100,50" RadiusX="100" RadiusY="50" />
</Path.Data>
</Path>
</Grid>
<Grid Margin="10">
<Rectangle Width="200" Height="100" HorizontalAlignment="Left" VerticalAlignment="Top">
<Rectangle.Fill>
<!--
RadiusX - 填充范围的 X 轴半径。默认值0.5
RadiusY - 填充范围的 Y 轴半径。默认值0.5
-->
<RadialGradientBrush GradientOrigin="0.3,0.3" Center="0.7,0.7" RadiusX="0.6" RadiusY="0.6">
<GradientStop Color="Red" Offset="0.0" />
<GradientStop Color="Green" Offset="0.25" />
<GradientStop Color="Blue" Offset="0.75" />
<GradientStop Color="Yellow" Offset="1.0" />
</RadialGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Path Stroke="Red" StrokeThickness="1" HorizontalAlignment="Left" VerticalAlignment="Top">
<Path.Data>
<EllipseGeometry Center="140,70" RadiusX="120" RadiusY="60" />
</Path.Data>
</Path>
</Grid>
<Grid Margin="10">
<Rectangle Width="200" Height="100" HorizontalAlignment="Left" VerticalAlignment="Top">
<Rectangle.Fill>
<!--
MappingMode - 指定线性渐变的起点（StartPoint）、终点（EndPoint）填充范围的 X 轴半径（RadiusX）和填充范围的 Y 轴半径（RadiusY）相对于输出区域是相对的还是绝对的 [System.Windows.Media.BrushMappingMode枚举]
MappingMode.RelativeToBoundingBox - 相对坐标。默认值
MappingMode.Absolute - 绝对坐标
-->
<RadialGradientBrush MappingMode="Absolute" GradientOrigin="60,30" Center="140,70" RadiusX="120" RadiusY="60">
<GradientStop Color="Red" Offset="0.0" />
<GradientStop Color="Green" Offset="0.25" />
<GradientStop Color="Blue" Offset="0.75" />
<GradientStop Color="Yellow" Offset="1.0" />
</RadialGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Path Stroke="Red" StrokeThickness="1" HorizontalAlignment="Left" VerticalAlignment="Top">
<Path.Data>
<EllipseGeometry Center="140,70" RadiusX="120" RadiusY="60" />
</Path.Data>
</Path>
</Grid>
</StackPanel>
</UserControl>
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