Mega Code Archive

 

Categories / VB.Net / WPF

 

Use OpacityMask and RadialGradientBrush

<Window x:Class="OpacityMaskExample"   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title=""   Height="430" Width="300">   <Grid>     <Grid.RowDefinitions>       <RowDefinition Height="Auto" />       <RowDefinition Height="Auto" />     </Grid.RowDefinitions>     <Grid Grid.Row="0" Margin="5">       <Grid.Background>         <ImageBrush ImageSource="c:\image.jpg" />       </Grid.Background>       <Ellipse Width="200" Height="200" StrokeThickness="0"         Fill="Yellow" Margin="20">         <Ellipse.OpacityMask>           <RadialGradientBrush GradientOrigin="0.5,0.5"             Center="0.5,0.5" RadiusX="1" RadiusY="1">             <GradientStop Offset="0" Color="Transparent" />             <GradientStop Offset="1" Color="Yellow" />           </RadialGradientBrush>         </Ellipse.OpacityMask>       </Ellipse>     </Grid>   </Grid> </Window>