c# - C# 中的 Google 地球插件

Question

在本教程中，您可以自定义 LINESTRING https://developers.google.com/earth/documentation/geometries?hl=en

但是当我尝试使用 C# VS2012 代码行时

var lineStyle = lineStringPlacemark.getStyleSelector().getLineStyle();

我找不到方法 getLineStyle() 所以我得到了错误；

错误:Error1 GEPlugin.IKmlStyleSelector' 不包含 'getLineStyle' 的定义，并且找不到接受类型为 'GEPlugin.IKmlStyleSelector' 的第一个参数的扩展方法 'getLineStyle'(您是否缺少 using 指令或程序集引用？)

这是我的完整代码:

    var lineStringPlaceMark = m_ge.createPlacemark("");
    var lineString = m_ge.createLineString("");
    lineStringPlaceMark.setGeometry(lineString);
    lineString.setExtrude(5);
    lineString.setTessellate(500);
    lineString.setAltitudeOffset(5);
    lineString.setAltitudeMode(m_ge.ALTITUDE_RELATIVE_TO_GROUND);

    for (int x = 0; x < arraylat.Length; x++)
    {
        lineString.getCoordinates().pushLatLngAlt(Convert.ToDouble(arraylat[x]), Convert.ToDouble(arraylong[x]), 0);
    }
    //lineString.getCoordinates().pushLatLngAlt(Convert.ToDouble(arraylat[counter]), Convert.ToDouble(arraylong[counter]), 0);



     lineStringPlaceMark.setStyleSelector(m_ge.createStyle("").getLineStyle());

    if (null == lineStringPlaceMark.getStyleSelector())
    {
        lineStringPlaceMark.setStyleSelector(m_ge.createStyle("").getLineStyle());
    }
    var lineStyle =  m_ge.createStyle("").getLineStyle();
    lineStyle.setWidth(100);
    lineStyle.getColor().set("9900ffff");

   /* var lineStyle = lineStringPlaceMark.getStyleSelector().getLineStyle();
     lineStyle.setWidth(lineStyle.getWidth() + 2);
         lineStyle.getColor().set("6600ffff");
    // The Style of a Feature is retrieved as feature.getStyleSelector().
    // The Style itself contains a LineStyle, which is what we manipulate
    // to change the color and width of the line.

    */
    m_ge.getFeatures().appendChild(lineStringPlaceMark);

Answer 1

您首先需要通过 GEPlugin.createStyle() 创建实际的样式对象，然后才能使用它。

您的代码中存在一些错误。线条

lineStringPlaceMark.setStyleSelector(m_ge.createStyle("").getLineStyle());

和

var lineStyle = m_ge​​.createStyle("").getLineStyle();

看看它，您需要做类似的事情。

var lineStringPlaceMark = m_ge.createPlacemark(string.Empty);
var lineString = m_ge.createLineString(string.Empty);
lineStringPlaceMark.setGeometry(lineString);
lineString.setExtrude(5);
lineString.setTessellate(500);
lineString.setAltitudeOffset(5);
lineString.setAltitudeMode(m_ge.ALTITUDE_RELATIVE_TO_GROUND);

for (int x = 0; x < arraylat.Length; x++)
{
    lineString.getCoordinates().pushLatLngAlt(
      Convert.ToDouble(arraylat[x]),
      Convert.ToDouble(arraylong[x]), 0);
}

// we know the placemark has no style, so create one for it
lineStringPlaceMark.setStyleSelector(m_ge.createStyle(string.Empty));

// now you can access the style object 
var lineStyle = lineStringPlaceMark.getStyleSelector().getLineStyle();
lineStyle.setWidth(100);
lineStyle.getColor().set("9900ffff");

m_ge.getFeatures().appendChild(lineStringPlaceMark);

您还可以制作一个简单的静态方法，返回任何功能的样式选择器，如果它不存在则创建它。

// getStyleSelector wrapper, creates a style object if non is present
static dynamic GetStyleSelector(dynamic ge, dynamic feature) {
  if(null == feature.getStyleSelector()) {
      feature.setStyleSelector(ge.createStyle(string.Empty));
  }

  return feature.getStyleSelector();
}