topic Re: Feature layer selection using attribute query in ArcGIS API for Silverlight Questions

Feature layer selection using attribute query

BrianPangtay — Fri, 29 Oct 2010 11:40:00 GMT

How does one perform an attribute query but display the results as a feature selection?

The samples display the results of a query by adding geometry to a graphics layer and clears the graphics layer when a new query is performed.

I would like to select the appropriate features in the feature layer instead so that features can be added/removed interactively from the selection after performing the initial selection via an attribute query.

Thanks for your help.

Re: Feature layer selection using attribute query

JenniferNery — Sun, 12 Dec 2021 03:27:57 GMT

Sure this can be done by setting the graphic's Selected property to true. Provided your FeatureLayer is added to your map, you can do something like:

        private void QueryTask_ExecuteCompleted(object sender, QueryEventArgs args)
        {
            FeatureSet featureSet = args.FeatureSet;
            foreach (var item in featureSet.Features)
                item.Selected = true;
        }

The FeatureLayer itself has a Where property too you can use to filter. You can look at this sample: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#FeatureLayerFiltering