Polyline.FillRule Property

July 28, 2014

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)
XMLNS for XAML: Not mapped to an xmlns.

public FillRule FillRule { get; set; }
<Polyline FillRule="NonZero"/>
-or-
<Polyline FillRule="EvenOdd"/>

Property Value

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

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.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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