setSelectionSymbol doesn't work first time...

Question

Does anyone know why setSelectionSymbol doesn't work after the first select, but any subsequent select will result in the selection symbol working?

Ken

SteveLettau · Answer

The issue had a couple items associated with it.   First off, the layer I was selecting features on was not visible at the scale of the map I was starting with, and I determined that if I zoomed into a scale that turned my layer on, it worked.

However, a larger issue it uncovered is related to the generalization of features.  The shape of the selection varied based on the scale of the map, that is, if I was zoomed in closely when I started the selection process, the feature shape was more accurate.  If I started the operation zoomed out a bit further, the selection shape was generalized.

I'm working around this by first querying for the feature using a QueryTask, then zooming to the results geometry.  Then I perform a second operation to select the feature.  It works every time now.  Not sure this is a great solution but it works.

Steve

MaudGillespie · Answer

This thread has been inactive for a while, but I'm experiencing the exact same problem.  setSelectionSymbol doesn't work for the first query, but then works fine in all subsequent queries.  I've experimented with different initial view extents, and there seems to be correlation, but I can't figure it out.  That is, if my initial extents is large area, like the entire state, a single, selected parcel will not show the symbol.  However, if I set my initial extents to be already zoomed into a parcel then query, it will render.

I have read that rendering of features in feature layers have something to do with the scale level, but I can't be sure.

Anybody have experience in resolving this?

Steve

GregKnight · Answer

Thanks Diana.  I will give your code a look-see and hopefully Ill have better luck tomorrow.

Thanks again...