public XmlDocument getKML(int connID)
{
String serverPath = "http://" + HttpContext.Current.Request.ServerVariables["SERVER_NAME"] + ":"
+ HttpContext.Current.Request.ServerVariables["SERVER_PORT"];
//create new connection a populate fields to get the connection name for KMLGenerator
Connection conn = new Connection(connID);
conn.populateFields();
string name = conn.getConnInfo().getConnectionName();
//create a new kml genereator with the connection name as the placemark name
KMLGenerator kmlGen = new KMLGenerator(name, serverPath);
string kml = "";
//generate the kml for the given connID
try
{
kml = kmlGen.generateKML(connID);
}
catch (Exception e)
{
//if there was an error generating kml, return a kml file that contains only a screen overlay that states there was an error generating kml
kml = "<ScreenOverlay> <name>KML Error</name> <Icon> <href>" + serverPath + "/graphics/kml-error.png</href> </Icon> <overlayXY x=\"0.5\" y=\"0.5\" xunits=\"fraction\" yunits=\"fraction\"/> <screenXY x=\"0.5\" y=\"0.5\" xunits=\"fraction\" yunits=\"fraction\"/> <rotationXY x=\"0\" y=\"0\" xunits=\"fraction\" yunits=\"fraction\"/> <size x=\"1\" y=\"0.2\" xunits=\"fraction\" yunits=\"fraction\"/></ScreenOverlay>";
}
//add the kml to an XMLDoc and return
XmlDocument kmlDoc = new XmlDocument();
kmlDoc.LoadXml(kml);
return kmlDoc;
}
protected void genKMLFunction(object sender, EventArgs e)
{
try
{
//Generate the KML from the connection
ImageButton sendBtn = (ImageButton)sender;
String serverPath = "http://" + Request.ServerVariables["SERVER_NAME"] + ":" + Request.ServerVariables["SERVER_PORT"];
string args = sendBtn.CommandArgument.ToString();
KMLGenerator kml = new KMLGenerator(ConnInfo.getConnInfo(Convert.ToInt32(args)).getConnectionName(), serverPath);
//Generate the KML string based on the connection id
String kmlString = kml.generateKML(int.Parse(args));
Connection conn = new Connection(int.Parse(args));
conn.populateFields();
//Write the KML string to a downloadable file
Response.ClearHeaders();
Response.ClearContent();
Response.ContentType = "application/vnd.google-earth.kml+xml kml";
Response.AddHeader("Content-Disposition", "attachment; filename=\"" + (conn.getConnInfo()).getConnectionName() + ".kml");
Response.Write(kmlString);
Response.End();
return;
}
catch (ODBC2KMLException ex)
{
ErrorHandler err = new ErrorHandler(ex.errorText, errorPanel1);
err.displayError();
return;
}
//Response.Redirect("Main.aspx", true);
}
/// <summary>
/// This function takes a connection object and generates all the associated KML for that connection.
/// It works hand-in-hand with KMLGenerationLibrary, Styles, and Placemarks.
///
/// There is also a helper class used to prevent duplicate styles (HashStyleComparer).
/// </summary>
/// <param name="connection">Connection --> connection object for the connection that you wish to generate KML for</param>
/// <returns>String --> A string that is the KML</returns>
public string generateKMLFromConnection(Connection connection)
{
//if the mapping is invalid, throw an exception and don't try to continue
if (!connection.mapping.isValid(connection.connInfo))
{
throw new ODBC2KMLException("There was an exception generating KML. Mapping is invalid.");
}
//Needed to generate KML, parameter is desired file name within KML file
KMLGenerationLibrary kmlGenerator = new KMLGenerationLibrary(this.fileName);
try
{
//Get mappings fromc onnection object
Mapping map = connection.getMapping();
//Create array list to hold places
ArrayList placemarks = new ArrayList();
//Create hashset to hold unique styles, takes HashStyleComparer which is a helper class
HashSet<Style> styles = new HashSet<Style>(new HashStyleComparer());
//Create the Icon array and grabs the icons for the connection
ArrayList icons = new ArrayList();
icons = connection.getIcons();
//Create the overlay array and grab the overlays for the connection
ArrayList overlays = new ArrayList();
overlays = connection.getOverlays();
//Retrieve description string
String descString = connection.getDescription().getDesc();
//Create an array to store new description values
ArrayList descArray = new ArrayList();
//Create data table to pass to parser
DataTable remote = null;
//Create database
Database DB = new Database(connection.getConnInfo());
//Grab the tablename out of mapping
String tableName = map.getTableName();
try
{
if (connection.getConnInfo().getDatabaseType() == ConnInfo.MSSQL)
{
remote = DB.executeQueryRemote("SELECT * FROM " + tableName);
}
else if (connection.getConnInfo().getDatabaseType() == ConnInfo.MYSQL)
{
remote = DB.executeQueryRemote("SELECT * FROM " + tableName + ";");
}
else if (connection.getConnInfo().getDatabaseType() == ConnInfo.ORACLE)
{
remote = DB.executeQueryRemote("SELECT * FROM \"" + tableName + "\"");
}
}
catch
{
throw new ODBC2KMLException("There was an exception generating KML. There was a problem retreiving data from the remote server");
}
//Parsed descriptions for rows
descArray = Description.parseDesc(remote, descString, tableName);
int counter = 0;
//For each row in the table!!!
foreach (DataRow remoteRow in remote.Rows)
{
//Set placemark name
string placemarkName;
try
{
if (map.getPlacemarkFieldName() == null || map.getPlacemarkFieldName().Trim().Equals("") || map.getPlacemarkFieldName().Trim().Equals("No placemark name mapped"))
{
placemarkName = "";
}
else
{
placemarkName = (String)remoteRow[map.getPlacemarkFieldName()];
}
}
catch
{
throw new ODBC2KMLException("There was an exception generating KML. Error parsing placemark.");
}
//Foreach row set the description for each row
String rowDesc = descArray[counter].ToString();
//Declare the lat and long holders
Double rowLat = 0, rowLon = 0;
//Check to see how many columns there are
try
{
if (map.getFormat() != Mapping.SEPARATE)
{
//Select the column value
String column = "";
foreach (DataColumn remoteColumn in remote.Columns)
{
if (remoteColumn.ColumnName == map.getLatFieldName())
{
column = remoteRow[remoteColumn].ToString();
}
}
//Create the array to hold the coordinates
double[] coordinates;
//Separate the coordinates
//Order == Latitude First
if (map.getFormat() == Mapping.LATFIRST)
{
coordinates = map.separate(column, Mapping.LATFIRST);
rowLat = coordinates[0];
rowLon = coordinates[1];
}
else //Order == Longitude first
{
coordinates = map.separate(column, Mapping.LONGFIRST);
rowLon = coordinates[0];
rowLat = coordinates[1];
}
}
else//Two separate columns
{
//Get coordinates
foreach (DataColumn remoteColumn in remote.Columns)
{
if (remoteColumn.ColumnName == map.getLatFieldName())
{
rowLat = Double.Parse(remoteRow[remoteColumn].ToString());
}
else if (remoteColumn.ColumnName == map.getLongFieldName())
{
rowLon = Double.Parse(remoteRow[remoteColumn].ToString());
}
}//End for each
}//End else
}
catch
{
throw new ODBC2KMLException("There was an exception generating KML. Error parsing lat/long rows.");
}
//Row's icon
Icon rowIcon = new Icon();
rowIcon.setLocation("");
//For each icon until the first one found, compare the icons
//conditions against the given row
Boolean breakLoop = false;
foreach (Icon i in icons)
{
foreach (Condition c in i.getConditions())
{
//See if the condition applies to the given row
if (c.evaluateCondition(remoteRow, c, tableName))
{
//Set temp icon to row icon and tell it to break out
rowIcon = new Icon(i);
breakLoop = true;
}
//Grabbed the first icon, break out
if (breakLoop)
break;
}//End inner for each
//Grabbed the first icon, break out
if (breakLoop)
break;
}//End outer for each
//Long unsigned int, needed to properly interpret colors
UInt64 color = 0;
foreach (Overlay o in overlays)
{
foreach (Condition c in o.getConditions())
{
//See if the condition applies
if (c.evaluateCondition(remoteRow, c, tableName))
{
if (color == 0)
{
//Set the color to hex value
color = 0xFF000000;
}
//Mix the colors, if multiple colors work
color = color | (Convert.ToUInt64(o.getColor(), 16));
}
}//End inner for each
}//End outer for each
//Create Style and placemark for this coordinate set
Style rowStyle = new Style();
Placemark rowPlacemark;
//if there is an icon, create the name of the style based on the icon name and color
if (rowIcon.getLocation() != "")
{
if (rowIcon.getLocality() == false)
{
//Create new style with external icon
rowStyle = new Style(rowIcon, color, (rowIcon.getLocation() + "_" + color.ToString("X")));
rowIcon.setLocation("");
}
else //If the icon is local, append server data
{
//Create the new style, with local icon
rowIcon.setLocation(this.serverPath + rowIcon.getLocation());
rowStyle = new Style(rowIcon, color, (rowIcon.getLocation() + "_" + color.ToString("X")));
rowIcon.setLocation("");
}
}
else if (rowIcon.getLocation() == "" && color != 0) //Create the style name based on the color
{
rowStyle = new Style(rowIcon, color, color.ToString("X"));
}
else //If rowstyle is null, ignore it
{
rowStyle = null;
}
//Create placemark and add it to array list
rowPlacemark = new Placemark(rowLat, rowLon, rowDesc, placemarkName);
placemarks.Add(rowPlacemark);
//If there is a row style, add it to the placemark and the array list
if (rowStyle != null)
{
rowPlacemark.setPlacemarkStyleName("#" + rowStyle.getStyleName());
styles.Add(rowStyle);
}
else
{
//Default value which won't add a style to this placemark in KML
rowPlacemark.setPlacemarkStyleName("");
}
//Increment counter for next row (associated with getting the row description)
counter++;
}//End for each
// }//End for each
//Add each style to the KML
foreach (Style s in styles)
{
kmlGenerator.addStyle(s);
}
//Used to check if a look at has been added
Boolean addLookAt = false;
//Add each placemark to the KML
foreach (Placemark p in placemarks)
{
kmlGenerator.addPlacemark(p);
if (!addLookAt) //Add the first placemark as default lookat
{
kmlGenerator.addLookAt(p);
addLookAt = true;
}
}
}
catch (ODBC2KMLException e) //If bad things happen pass it up to connection details
{
throw e;
}
//Return KML string
return kmlGenerator.finalizeKML();
}
