那么,这里是一个冗长的方式来实现矩形的“阴影”,而不使用位图效果。在这种情况下,“阴影矩形”的中心被着色,但它可以被设置为透明以给你一个“晕轮”风格的投影(即等于一路 - 不抵消)
<UserControl x:Class="RectShadow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:System="clr-namespace:System;assembly=mscorlib">
<UserControl.Resources>
<System:Double x:Key="CornerSize">5</System:Double>
<Color x:Key="ShadowColor">#60000000</Color>
<Color x:Key="TransparentColor">#00000000</Color>
</UserControl.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
<RowDefinition/>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto"/>
<ColumnDefinition/>
<ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>
<Rectangle Width="{StaticResource CornerSize}" Height="{StaticResource CornerSize}">
<Rectangle.Fill>
<RadialGradientBrush Center="1,1" GradientOrigin="1,1" RadiusX="1" RadiusY="1">
<GradientStop Color="{StaticResource ShadowColor}"/>
<GradientStop Offset="1" Color="{StaticResource TransparentColor}"/>
</RadialGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Rectangle Grid.Row="2" Grid.Column="2" Width="{StaticResource CornerSize}" Height="{StaticResource CornerSize}">
<Rectangle.Fill>
<RadialGradientBrush Center="0,0" GradientOrigin="0,0" RadiusX="1" RadiusY="1">
<GradientStop Color="{StaticResource ShadowColor}"/>
<GradientStop Offset="1" Color="{StaticResource TransparentColor}"/>
</RadialGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Rectangle Grid.Row="0" Grid.Column="2" Width="{StaticResource CornerSize}" Height="{StaticResource CornerSize}">
<Rectangle.Fill>
<RadialGradientBrush Center="0,1" GradientOrigin="0,1" RadiusX="1" RadiusY="1">
<GradientStop Color="{StaticResource ShadowColor}"/>
<GradientStop Offset="1" Color="{StaticResource TransparentColor}"/>
</RadialGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Rectangle Grid.Row="2" Grid.Column="0" Width="{StaticResource CornerSize}" Height="{StaticResource CornerSize}">
<Rectangle.Fill>
<RadialGradientBrush Center="1,0" GradientOrigin="1,0" RadiusX="1" RadiusY="1">
<GradientStop Color="{StaticResource ShadowColor}"/>
<GradientStop Offset="1" Color="{StaticResource TransparentColor}"/>
</RadialGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Rectangle Grid.Column="1">
<Rectangle.Fill>
<LinearGradientBrush EndPoint="0,1">
<GradientStop Offset="1" Color="{StaticResource ShadowColor}"/>
<GradientStop Color="{StaticResource TransparentColor}"/>
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Rectangle Grid.Column="1" Grid.Row="2">
<Rectangle.Fill>
<LinearGradientBrush EndPoint="0,1">
<GradientStop Color="{StaticResource ShadowColor}"/>
<GradientStop Offset="1" Color="{StaticResource TransparentColor}"/>
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Rectangle Grid.Row="1">
<Rectangle.Fill>
<LinearGradientBrush EndPoint="1,0">
<GradientStop Offset="1" Color="{StaticResource ShadowColor}"/>
<GradientStop Color="{StaticResource TransparentColor}"/>
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Rectangle Grid.Row="1" Grid.Column="2">
<Rectangle.Fill>
<LinearGradientBrush EndPoint="1,0">
<GradientStop Color="{StaticResource ShadowColor}"/>
<GradientStop Offset="1" Color="{StaticResource TransparentColor}"/>
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
<Rectangle Grid.Row="1" Grid.Column="1">
<Rectangle.Fill>
<SolidColorBrush Color="{StaticResource ShadowColor}"/>
</Rectangle.Fill>
</Rectangle>
</Grid>
</UserControl>
它的工作原理!虽然看起来好像你并不需要在阴影中包含透明的Rectangle(或任何对象)。我唯一的问题是可以用于动态调整大小的内容吗? – Domokun 2011-10-14 04:38:26