Executing a Spatial Query on a Feature Layer

MichaelHamsa

Hello,

I was wondering if there were any good examples that would show me how to execute a QueryFeaturesAsync call on a FeatureTable using a SpatialRelationship of Within. I've got some code wired up but it doesn't seem to be returning any results, when I know there should be.

Here's the code I'm currently using. An exception is getting caught - no elements in this sequence when I try to get the First item from the query results.

                QueryParameters qp = new QueryParameters();
                qp.Geometry = new Envelope(Location, Radius, Radius);
                qp.SpatialRelationship = SpatialRelationship.Within;

                var table = layer.FeatureTable as GeodatabaseFeatureTable;

                try
                {
                    FeatureQueryResult queryResult = await table.QueryFeaturesAsync(qp);
                    Feature ftr = queryResult.First();
                }
                catch (Exception ex)
                {
                    string m = ex.Message;
                }

Thanks,

Mike...

MichaelHamsa

Thanks a lot to all of you for the comments. It ended up being the Contains (vs. Within). Once I started using Contains, I got the results I expected.

Thanks again,

Mike Hamsa

Chief Technology Officer - GeoSpatial Innovations, Inc.

P: 512-982-6735