Brush.Opacity Property (System.Windows.Media)

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Web Development
Silverlight
Silverlight 3
.NET Framework Class Library for Silverlight
System.Windows.Media Namespace
Brush Class
Brush Properties

Opacity Property

RelativeTransform Property
Transform Property

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AlignmentX Enumeration
AlignmentY Enumeration
ArcSegment Class
BezierSegment Class
BitmapCache Class
Brush Class
BrushMappingMode Enumeration
CacheMode Class
Color Structure
ColorInterpolationMode Enumeration
Colors Class
CompositionTarget Class
DeepZoomImageTileSource Class
DoubleCollection Class
EllipseGeometry Class
FillRule Enumeration
FontFamily Class
GeneralTransform Class
Geometry Class
GeometryCollection Class
GeometryGroup Class
GradientBrush Class
GradientSpreadMethod Enumeration
GradientStop Class
GradientStopCollection Class
ImageBrush Class
ImageSource Class
ImageSourceConverter Class
ImplicitInputBrush Class
LicenseAcquirer Class
LinearGradientBrush Class
LineGeometry Class
LineSegment Class
LogReadyRoutedEventArgs Class
LogReadyRoutedEventHandler Delegate
LogSource Enumeration
Matrix Structure
Matrix3DProjection Class
MatrixTransform Class
MediaElementState Enumeration
MediaSampleAttributeKeys Enumeration
MediaSourceAttributesKeys Enumeration
MediaStreamAttributeKeys Enumeration
MediaStreamDescription Class
MediaStreamSample Class
MediaStreamSource Class
MediaStreamSourceDiagnosticKind Enumeration
MediaStreamType Enumeration
MultiScaleTileSource Class
PathFigure Class
PathFigureCollection Class
PathGeometry Class
PathSegment Class
PathSegmentCollection Class
PenLineCap Enumeration
PenLineJoin Enumeration
PlaneProjection Class
PointCollection Class
PolyBezierSegment Class
PolyLineSegment Class
PolyQuadraticBezierSegment Class
Projection Class
QuadraticBezierSegment Class
RadialGradientBrush Class
RectangleGeometry Class
RenderingEventArgs Class
RotateTransform Class
ScaleTransform Class
SkewTransform Class
SolidColorBrush Class
Stretch Enumeration
StyleSimulations Enumeration
SweepDirection Enumeration
TextHintingMode Enumeration
TextOptions Class
TileBrush Class
TimelineMarker Class
TimelineMarkerCollection Class
TimelineMarkerRoutedEventArgs Class
TimelineMarkerRoutedEventHandler Delegate
Transform Class
TransformCollection Class
TransformGroup Class
TranslateTransform Class
VideoBrush Class
VisualTreeHelper Class

Brush..::.Opacity Property
This page is specific to:Microsoft Version:3.0 3.5Silverlight 34.0

.NET Framework Class Library for Silverlight

Brush..::.Opacity Property

Gets or sets the degree of opacity of a Brush.

Namespace: System.Windows.Media
Assembly: System.Windows (in System.Windows.dll)

Syntax

C++

JScript

Copy to Clipboard Print

'Usage

Dim instance As Brush
Dim value As Double

value = instance.Opacity

instance.Opacity = value

'Declaration

Public Property Opacity As Double
    Get
    Set

Property Value

Type: System..::.Double
The value of the Opacity property is expressed as a value between 0 and 1.0. The default value is 1.0.

Remarks

Dependency property identifier field: OpacityProperty

An Opacity value of 0 indicates that the brush is completely transparent, while a value of 1 indicates that the brush is completely opaque. A value of 0.5 indicates the brush is 50% opaque, a value of 0.725 indicates the brush is 72.5% opaque, and so on. Values less than 0 are treated as 0, while values greater than 1 are treated as 1.

The following illustrations shows a red rectangle with several different Opacity values.

Opacity = 1

Opacity = 0.7

ms611576.JOLT_opacity70percent(en-us,VS.95).gif

Opacity = 0.5

ms611576.JOLT_opacity50percent(en-us,VS.95).gif

Opacity = 0.2

ms611576.JOLT_opacity20percent(en-us,VS.95).gif

Opacity = 0

An Opacity of 0 applied to any Brush is still hit testable. Only a true null Brush is not hit testable. You could however set IsHitTestVisible to false to remove any hit testing against the UIElement where the Brush is ultimately applied.

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Reference

Brush Class

Brush Members

System.Windows.Media Namespace

Other Resources

Brushes