建设京东商城网站,月亮花园wordpress,卖芒果的网络营销策划,网站开发怎么在页面上调用高德地图显示位置前一篇文章中简要讲解了圆角按钮、圆形按钮的使用，以及在windows.resource和app.resource中设置圆角或圆形按钮的样式。
这篇主要讲解Polygon（多边形）、Ellipse（椭圆）、Path(路径)这三个内容。
Polygon
我们先看一下的源码：
namespace System.Windows.Shapes { pu…前一篇文章中简要讲解了圆角按钮、圆形按钮的使用，以及在windows.resource和app.resource中设置圆角或圆形按钮的样式。
这篇主要讲解Polygon（多边形）、Ellipse（椭圆）、Path(路径)这三个内容。
Polygon
我们先看一下的源码：
namespace System.Windows.Shapes { public sealed class Polygon : Shape { public static readonly DependencyProperty PointsProperty = DependencyProperty.Register("Points", typeof(PointCollection), typeof(Polygon), new FrameworkPropertyMetadata((object)new FreezableDefaultValueFactory((Freezable)PointCollection.get_Empty()), FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender)); public static readonly DependencyProperty FillRuleProperty = DependencyProperty.Register("FillRule", typeof(FillRule), typeof(Polygon), (PropertyMetadata)new FrameworkPropertyMetadata(FillRule.EvenOdd, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender), (ValidateValueCallback)ValidateEnums.IsFillRuleValid); private Geometry _polygonGeometry; public PointCollection Points { get { return (PointCollection)GetValue(PointsProperty); } set { SetValue(PointsProperty, value); } } public FillRule FillRule { get { return (FillRule)GetValue(FillRuleProperty); } set { SetValue(FillRuleProperty, value); } } protected override Geometry DefiningGeometry = _polygonGeometry; internal override void CacheDefiningGeometry() { PointCollection points = Points; PathFigure pathFigure = new PathFigure(); if (points == null) { _polygonGeometry = Geometry.Empty; return; } if (points.Count 0) { pathFigure.StartPoint = points[0]; if (points.Count 1) { Point[] array = new Point[points.Count - 1]; for (int i = 1; i points.Count; i++) { array[i - 1] = points[i]; } pathFigure.Segments.Add(new PolyLineSegment(array, isStroked: true)); } pathFigure.IsClosed = true; } PathGeometry pathGeometry = new PathGeometry(); pathGeometry.Figures.Add(pathFigure); pathGeometry.FillRule = FillRule; _polygonGeometry = pathGeometry; } }
}
从源码的信息可以看到Polygon是继承自Shape的类，可用的属性只有PointsProperty、FillRuleProperty两个属性；PointsProperty是PointCollection的Point集合，而Point实质就是一个二维坐标集合，因此在Polygon的使用中Points的中的数据必须是2N个。用法如下：
Polygon Points="100,400 200,370 180,470" Fill="#4EB1B6" /!--多边形--
效果图： Ellipse
源码如下：
namespace System.Windows.Shapes { public sealed class Ellipse : Shape { private Rect _rect = Rect.Empty; public override Geometry RenderedGeometry = DefiningGeometry; public override Transform GeometryTransform = Transform.Identity; protected override Geometry DefiningGeometry { get { if (_rect.IsEmpty) { return Geometry.Empty; } return new EllipseGeometry(_rect); } } internal override int EffectiveValuesInitialSize = 13; static Ellipse() { Shape.StretchProperty.OverrideMetadata(typeof(Ellipse), new FrameworkPropertyMetadata(Stretch.Fill)); } protected override Size MeasureOverride(Size constraint) { if (base.Stretch == Stretch.UniformToFill) { double width = constraint.Width; double height = constraint.Height; if (double.IsInfinity(width) double.IsInfinity(height)) { return GetNaturalSize(); } width = ((!double.IsInfinity(width) !double.IsInfinity(height)) ? Math.Max(width, height) : Math.Min(width, height)); return new Size(width, width); } return GetNaturalSize(); } protected override Size ArrangeOverride(Size finalSize) { double strokeThickness = GetStrokeThickness(); double num = strokeThickness / 2.0; _rect = new Rect(num, num, Math.Max(0.0, finalSize.Width - strokeThickness), Math.Max(0.0, finalSize.Height - strokeThickness)); switch (base.Stretch) { case Stretch.None: { double num4 = (_rect.Width = (_rect.Height = 0.0)); break; } case Stretch.Uniform: if (_rect.Width _rect.Height)
