ArcGIS for silverlight画圆如此简单

/// <summary>
/// 360度画圆
/// </summary>
/// <param name="radius">半径</param>
/// <param name="centerP">中心点</param>
/// <param name="color">填充色</param>
/// <returns>返回Graphic</returns>

public static Graphic GetEllipseGraphic(double radius,ComPoint centerP,string color)

{ Graphic result = new Graphic(); List<MapPoint> points = new List<MapPoint>(); for (double i = 0; i <= 360; i++) { points.Add(new MapPoint((centerP.X - Math.Cos(Math.PI * i / 180.0) * radius),(centerP.Y - Math.Sin(Math.PI * i / 180.0) * radius))); } PointCollection pCollection = new PointCollection(points); polygon g = new polygon(); g.Rings.Add(pCollection); result.Geometry = g;   result.Symbol = Tools.DrawStyletools.GetEllipseFillSymbol(color);//这里根据自己的需要定义样式 return result; }