private void AddPolygonGraphics()
{
string coordinateString1 = "14819406,1294088 13066124,751406 13191358,2880391 15570812,2713412 14819406,1294088";
GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;
PointCollectionConverter pointConverter = new PointCollectionConverter();
ESRI.ArcGIS.Client.Geometry.PointCollection pointCollection1 =
pointConverter.ConvertFromString(coordinateString1) as ESRI.ArcGIS.Client.Geometry.PointCollection;
ESRI.ArcGIS.Client.Geometry.Polygon polygon1 = new ESRI.ArcGIS.Client.Geometry.Polygon();
polygon1.Rings.Add(pointCollection1);
Graphic graphic = new Graphic()
{
Geometry = polygon1,
Symbol = DefaultFillSymbol
};
graphicsLayer.Graphics.Add(graphic);
}
private void AddPolygonGraphics()
{
string coordinateString1 = "130,5.59 118.42,3.92 117.3,23.3 143.2,22.9 130,5.59";
GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;
PointCollectionConverter pointConverter = new PointCollectionConverter();
ESRI.ArcGIS.Client.Geometry.PointCollection pointCollection1 =
pointConverter.ConvertFromString(coordinateString1) as ESRI.ArcGIS.Client.Geometry.PointCollection;
ESRI.ArcGIS.Client.Geometry.Polygon polygon1 = new ESRI.ArcGIS.Client.Geometry.Polygon();
polygon1.Rings.Add(pointCollection1);
Graphic graphic = new Graphic()
{
Geometry = mercator.FromGeographic(polygon1),
Symbol = LayoutRoot.Resources["DefaultFillSymbol"] as Symbol
};
graphicsLayer.Graphics.Add(graphic);
}
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
if (string.IsNullOrEmpty(values[3].ToString()))
{
return(null);
}
string dataStr = values[3].ToString().Substring(1, values[3].ToString().Count() - 2).Replace("L", " ");
PointCollectionConverter pcconverter = new PointCollectionConverter();
PointCollection pc = new PointCollection();
pc = (PointCollection)pcconverter.ConvertFromString(dataStr);
List <Point> pointList = pc.ToList();
double xMin_color = 0; // 色标最小值
double xMax_color = 60; // 色标最大值
// 定义色标颜色值（彩虹色）
Color[] colors = new Color[7] {
Colors.Red, Colors.Orange, Colors.Yellow, Colors.Green, Colors.Indigo, Colors.Blue, Colors.Violet
};
// 定义色标与数值范围字典表
System.Collections.Generic.Dictionary <string, string> colorDic = new System.Collections.Generic.Dictionary <string, string>();
double interval = Math.Ceiling((xMax_color - xMin_color) / 6); //处理最大值与最小值间隔，保证彩虹色都使用
for (int skip = 0; skip < 7; skip++)
{
double xRange = xMin_color + (interval * skip);
double xNextRange = xMin_color + (interval * (skip + 1));
colorDic.Add(string.Format(@"{0}_{1}", xRange, xNextRange), string.Format(@"{0}_{1}", skip, skip + 1));
if (xNextRange >= xMax_color)
{
break;
}
}
//colorDic 目前参数没有使用，使用的是静态的，待设置功能开发完，更换 2017-3-22 sjm
LinearGradientBrush lineGradientBrush = new LinearGradientBrush();
// 垂直线性渐变
lineGradientBrush.StartPoint = new Point(0.5, 0);
lineGradientBrush.EndPoint = new Point(0.5, 1);
lineGradientBrush.GradientStops.Add(new GradientStop()
{
Color = Colors.White, Offset = 0
});
char split = '_';
for (int i = 0; i < pointList.Count; i++)
{
double xPoint = pointList[i].X > xMax_color ? xMax_color : pointList[i].X;
var colorDicValue = colorDic.FirstOrDefault(x =>
double.Parse(x.Key.Split(split)[0]) <= xPoint &&
double.Parse(x.Key.Split(split)[1]) >= xPoint
).Value;
var colorDicKey = colorDic.FirstOrDefault(q => q.Value == colorDicValue).Key;
string[] colorStrs = colorDicValue.Split(split);
string[] keyStrs = colorDicKey.Split(split);
Color s_color = colors[int.Parse(colorStrs[0])];
Color d_color = colors[int.Parse(colorStrs[1])];
Color vColor = GetGradientColor(s_color, d_color, xPoint, double.Parse(keyStrs[0]), double.Parse(keyStrs[1]));
lineGradientBrush.GradientStops.Add(new GradientStop(vColor, (double)i / pointList.Count));
}
lineGradientBrush.GradientStops.Add(new GradientStop()
{
Color = Colors.White, Offset = 1
});
return(lineGradientBrush);
}