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Polygon.FillRule Property

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Gets or sets a value that specifies how the interior fill of the shape is determined.

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

Syntax

'Declaration
Public Property FillRule As FillRule

public FillRule FillRule { get; set; }

<Polygon FillRule="NonZero"/>
-or-
<Polygon FillRule="EvenOdd"/>

Property Value

Type: System.Windows.Media.FillRule
A value of the enumeration. The default is EvenOdd.

Remarks

Dependency property identifier field: FillRuleProperty

The EvenOdd default setting for FillRule determines the "insideness" of a point on the shape. It draws a ray from the point to infinity in any direction and counts the number of path segments from the specified shape that the ray crosses. If the number is odd, the point is inside; if it is even, the point is outside.

Specifying Nonzero for FillRule determines the "insideness" of a point on the shape by a different model than EvenOdd. It draws a ray from the point to infinity in any direction and then examines the places where a segment of the shape crosses the ray. Starting with a count of zero, it adds one each time a segment crosses the ray from left to right and subtracts one each time a path segment crosses the ray from right to left. After it counts the crossings, if the result is zero, the point is outside the path. Otherwise, it is inside.

Fill rule illustration

FillRule values.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

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

Platforms

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