将坐标集合datatable 存为googleearth可打开的kml文件

将坐标集合datatable 存为googleearth可打开的kml文件

SaveFileDialog saveFile = new SaveFileDialog();

saveFile.Filter = "Google地图轨迹(*.kml)|所有文件(*.*)";

saveFile.ShowDialog();

if (saveFile.FileName.Trim() == "") return;

string filename = saveFile.FileName + ".kml";

// Create the file and writer.

FileStream fs = new FileStream(filename, FileMode.Create);

XmlTextWriter w = new XmlTextWriter(fs, Encoding.UTF8);

// Start the document.

w.WriteStartDocument();

w.WriteStartElement("kml", "http://earth.google.com/kml/2.1");

w.WriteStartElement("Document");

w.WriteStartElement("name");

w.WriteString(filename);

w.WriteEndElement();

w.WriteStartElement("open");

w.WriteString("1");

w.WriteEndElement();

//style

w.WriteStartElement("Style");

w.WriteAttributeString("id", "normalPlacemark");

w.WriteStartElement("IconStyle");

w.WriteStartElement("Icon");

w.WriteStartElement("href");

w.WriteString("F:/img/aws0.gif");

w.WriteEndElement();//style

w.WriteEndElement();//iconStyle

w.WriteEndElement();//icon

w.WriteEndElement();//href

//stylemap

w.WriteStartElement("StyleMap");

w.WriteAttributeString("id", "exampleStyleMap");

w.WriteStartElement("Pair");

w.WriteStartElement("key");

w.WriteString("normal");

w.WriteEndElement();

w.WriteStartElement("styleUrl");

w.WriteString("#normalPlacemark");

w.WriteEndElement();//styleUrl

w.WriteEndElement();//pair

w.WriteEndElement();//StyleMap

w.WriteStartElement("Placemark");

w.WriteStartElement("Name");

w.WriteString(filename);

w.WriteEndElement();

//write styleurl

w.WriteStartElement("styleUrl");

w.WriteString("#exampleStyleMap");

w.WriteEndElement();

// Write Point element

w.WriteStartElement("LineString");

w.WriteStartElement("coordinates");

string points = "";

for (int i = 0; i < _dtHistoryPoints.Rows.Count; i++)

{

string lng = _dtHistoryPoints.Rows[i]["Longitude"].ToString();

string lat = _dtHistoryPoints.Rows[i]["Latitude"].ToString();

points += lng + "," + lat + ",0 ";

}

w.WriteString(points);

w.WriteEndElement();

w.WriteEndElement();

w.WriteEndElement(); // Placemark

w.WriteEndElement();//document

w.WriteEndElement(); // kml

// Ends the document.

w.WriteEndDocument();

// close writer

w.Close();