KmlReader in Background thread

[Ohad]

var frameworkElements = KmlReader.Read(memoryStream);

I have a list of the elements (which in the initial stage are not displayed on the map) and I want to have a BusyIndicator until loading.

That is, until I performed the KmlReader.Read(memoryStream), the list in the picture will be a square without data, so I want a BusyIndicator

But the KmlReader works on the UI thread, so this cannot be done.

Is there a way to overcome this?

Is there a way to make this line in the background thread?

 

[Petar Mladenov]

Hello Ohad,

You can use the AsyncKmlReader with VisualizationLayer.  The following article also shows a BusyIndicator example:

https://docs.telerik.com/devtools/wpf/controls/radmap/features/visualization-layer/reading-map-shapes#reading-files 

Regards,
Petar Mladenov
Progress Telerik

[Ohad]

var path = @"C:\Users\Downloads\test.kml";

var xDocument= XDocument.Load(path);

MemoryStream ms = new MemoryStream();

xDocument.Save(ms);

ms.Position = 0;

var asyncKmlReader = new AsyncKmlReader();

asyncKmlReader.ReadAsync(memoryStream);

In this code AsyncKmlReader does not contain any items, if I change it to KmlReader then I have items.

 

I would like to understand where the problem is here

[Stenly]

The reason for this behavior is that the AsyncKmlReader will start reading the KML file asynchronously. Once it is done reading the file, the PreviewReadShapeDataCompleted event of the AsyncKmlReader instance will occur. Through its event arguments, the items can be retrieved (utilize the Items property of the event arguments).

With this being said, I hope the provided information will be of help to you.