Load, edit and save kmz file

MarkvanWinkelen — Tue, 15 Nov 2022 11:21:46 GMT

Hello all,

I've been working on an WinUI app in which I can load and display a kmz file as an operational layer on a mapview. But, I want also to edit and save the kmz file with the added information.

To load the information, I use the following:

kmlLayer = new KmlLayer(new Uri(@"C:\Users\markv\Downloads\Trektochtlocaties.kmz")); MapView.Map.OperationalLayers.Add(kmlLayer);

I am also able to add a placemark using:

try { SketchCreationMode creationMode; creationMode = SketchCreationMode.Point; Geometry geometry = await MapView.SketchEditor.StartAsync(creationMode, true); Geometry projectedGeometry = GeometryEngine.Project(geometry, SpatialReferences.Wgs84); KmlGeometry kmlGeometry = new KmlGeometry(projectedGeometry, KmlAltitudeMode.ClampToGround); currentPlacemark = new KmlPlacemark(kmlGeometry); currentPlacemark.Style = new KmlStyle(); currentPlacemark.Style.IconStyle = new KmlIconStyle(new KmlIcon(new Uri("https://static.arcgis.com/images/Symbols/Shapes/BluePin1LargeB.png")), 1.0); kmlDocument.ChildNodes.Add(currentPlacemark); } catch { }

and then save a new file using the following code:

try { MapView.SketchEditor.CompleteCommand.Execute(null); //Remove old file try { System.IO.File.Delete(@"C:\Users\markv\Downloads\Trektochtlocaties_old.kmz"); } catch { } //Rename and delete current file System.IO.File.Copy(@"C:\Users\markv\Downloads\Trektochtlocaties.kmz", @"C:\Users\markv\Downloads\Trektochtlocaties_old.kmz"); System.IO.File.Delete(@"C:\Users\markv\Downloads\Trektochtlocaties.kmz"); //Save new file await kmlDocument.SaveAsAsync(@"C:\Users\markv\Downloads\Trektochtlocaties.kmz"); } catch { }

So, I can load the existing file, and seperate from that add placemarks to a new kmlDocument and save that to a file. But, this causes the existing file to be overwritten with the new file, so the existing information disappears.

How can I combine these codes in order to load a file, edit that file and save all the information? Thanks!

topic Load, edit and save kmz file in .NET Maps SDK Questions

Load, edit and save kmz file