How to get the clicked graphic(or a feature) in a graphicslayer(or a featurelayer) using runtime sdk for .ne

Question

I would like to obtain informations(the instance) of the clicked feature in a feature layer.

In runtime for wpf we have the MouseLeftButtonDown event provided by the graphicslayer class. The event will pass the clicked instance, but not a equivalent one could be found in runtime for .net.

JohnWoon · Answer

HitTesting only returns an array of the feature ids, not graphics. And I am not quite sure, but it seems "var features = await cities.FeatureTable.QueryAsync(rows);"  may re-query the server.

I tried a similarly way before, and I found that I could retrieve more attributes than the outfields I defined before.

I there a possible way to query locally cached data? So it may speed up.

AnttiKajanus1 · Answer

You can use MapViewTapped event (or Editor class) to get location and then use Layer's HitTestAsync method to get graphics from the layer.

See sample HitTesting​ or equivalent for GraphicsLayers / Overlays.