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LinearGradientBrush Class

Paints an area with a linear gradient.

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

public sealed class LinearGradientBrush : GradientBrush
<LinearGradientBrush ...>
  oneOrMoreGradientStops
</LinearGradientBrush

XAML Values

oneOrMoreGradientStops

One or more GradientStop object elements. Object elements defined here become members of the GradientStopCollection when code accesses the GradientStops property at run time.

The LinearGradientBrush type exposes the following members.

  NameDescription
Public methodSupported by Silverlight for Windows PhoneLinearGradientBrush()Initializes a new instance of the LinearGradientBrush class.
Public methodSupported by Silverlight for Windows PhoneLinearGradientBrush(GradientStopCollection, Double)Initializes a new instance of the LinearGradientBrush class that has the specified GradientStopCollection and angle.
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  NameDescription
Public propertySupported by Silverlight for Windows PhoneColorInterpolationModeGets or sets a ColorInterpolationMode enumeration value that specifies how the gradient's colors are interpolated. (Inherited from GradientBrush.)
Public propertySupported by Silverlight for Windows PhoneDispatcherGets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
Public propertySupported by Silverlight for Windows PhoneEndPointGets or sets the ending two-dimensional coordinates of the linear gradient.
Public propertySupported by Silverlight for Windows PhoneGradientStopsGets or sets the brush's gradient stops. (Inherited from GradientBrush.)
Public propertySupported by Silverlight for Windows PhoneMappingModeGets or sets a BrushMappingMode enumeration value that specifies whether the positioning coordinates of the gradient brush are absolute or relative to the output area. (Inherited from GradientBrush.)
Public propertySupported by Silverlight for Windows PhoneOpacityGets or sets the degree of opacity of a Brush. (Inherited from Brush.)
Public propertySupported by Silverlight for Windows PhoneRelativeTransformGets or sets the transformation that is applied to the brush using relative coordinates. (Inherited from Brush.)
Public propertySupported by Silverlight for Windows PhoneSpreadMethodGets or sets the type of spread method that specifies how to draw a gradient that starts or ends inside the bounds of the object to be painted. (Inherited from GradientBrush.)
Public propertySupported by Silverlight for Windows PhoneStartPointGets or sets the starting two-dimensional coordinates of the linear gradient.
Public propertySupported by Silverlight for Windows PhoneTransformGets or sets the transformation that is applied to the brush. (Inherited from Brush.)
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  NameDescription
Public methodSupported by Silverlight for Windows PhoneCheckAccessDetermines whether the calling thread has access to this object. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneClearValueClears the local value of a dependency property. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows PhoneFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetAnimationBaseValueReturns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetValueReturns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
Protected methodSupported by Silverlight for Windows PhoneMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneReadLocalValueReturns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneSetValueSets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public fieldStatic memberSupported by Silverlight for Windows PhoneEndPointPropertyIdentifies the EndPoint dependency property.
Public fieldStatic memberSupported by Silverlight for Windows PhoneStartPointPropertyIdentifies the StartPoint dependency property.
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A LinearGradientBrush paints an area with a linear gradient. A linear gradient defines a gradient along a line. The line's end points are defined by the StartPoint and EndPoint properties of the linear gradient. A LinearGradientBrush brush paints its GradientStops along this line.

The default linear gradient is diagonal. In the default, the StartPoint of a linear gradient is a Point with value 0,0, the upper-left corner of the area being painted, and its EndPoint is a Point with value 1,1, the lower-right corner of the area being painted. The colors in the resulting gradient are interpolated along the diagonal path.

The following illustration shows a diagonal gradient. A line was added to highlight the interpolation path of the gradient from the start point to the end point.

A diagonal linear gradient

Shows a gradient axis.

The next illustration shows the same linear gradient, but with highlighted gradient stops.

A diagonal linear gradient with highlighted gradient stops

Gradient with gradient stops.

It is possible to specify a gradient axis that does not completely fill area being painted. When this occurs, the SpreadMethod property determines how the remaining area is painted.

The following example creates a linear gradient with four colors and uses it to paint a Rectangle.


<StackPanel>
  <!-- This rectangle is painted with a vertical linear gradient. -->
  <Rectangle Width="200" Height="100">
    <Rectangle.Fill>
      <LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
        <GradientStop Color="Yellow" Offset="0.0" />
        <GradientStop Color="Red" Offset="0.25" />
        <GradientStop Color="Blue" Offset="0.75" />
        <GradientStop Color="LimeGreen" Offset="1.0" />
      </LinearGradientBrush>
    </Rectangle.Fill>
  </Rectangle>
</StackPanel>


The following illustration shows the resulting gradient. The gradient axis is marked with a dashed line, and the gradient stops are marked with circles.

Gradient axis for a vertical gradient

Gradient Stops of Linear Gradient

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

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

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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