topic Re: Find task timing out - only a few features in ArcGIS Viewer for Silverlight Questions

Find task timing out - only a few features

KarenEllett — Fri, 05 Jul 2013 13:52:08 GMT

I have a find task set to search one layer, one field, but it takes 60+ seconds to run, or completely times out. There are only 115 total features in the layer, and only 11 that actually match the query. Anyone know why it's taking so long or how to speed it up? It's a line feature. Here's the code:

public void RunFindTask()
        {
            busyIndicator1.IsBusy = true;
            GraphicsLayer graphicsLayer = MapApplication.Current.Map.Layers["MyGraphicsLayer"] as GraphicsLayer;
            graphicsLayer.ClearGraphics();

            FindTask cgtFindTask = new FindTask("http://myserver/ArcGIS/rest/services/CGT/MainLayers/MapServer");
            cgtFindTask.ExecuteCompleted += cgtFindTask_ExecuteCompleted;
            cgtFindTask.Failed += FindTask_Failed;
            FindParameters cgtFindParameters = new FindParameters();
            cgtFindParameters.ReturnGeometry = true;
            cgtFindParameters.SpatialReference = MapApplication.Current.Map.SpatialReference;



                cgtFindParameters.LayerIds.AddRange(new int[] { 10 });
                cgtFindParameters.SearchFields.AddRange(new string[] { "SUBSYSTEM", "SYSTEM_NM" });
                cgtFindParameters.SearchText = Subsystem.Text;


            cgtFindTask.ExecuteAsync(cgtFindParameters);

        }

Re: Find task timing out - only a few features

KarenEllett — Fri, 05 Jul 2013 13:53:30 GMT

Also, just realized that actually shows it searching two fields, not one. That was a change I just now made to test something; originally it was running against only one field, same results.

Re: Find task timing out - only a few features

KarenEllett — Mon, 08 Jul 2013 12:29:25 GMT

Since I'm only looking at one layer for this, I've also tried it as a query task. However it returns 0 features every time, even though it should be returning 8-10. Here's the code.

QueryTask queryTask = new QueryTask("http://myserver/ArcGIS/rest/services/CGT/MainLayers/MapServer/10");
            queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;
            queryTask.Failed += QueryTask_Failed;
            Query query = new Query();
            query.ReturnGeometry = true;
            query.OutFields.AddRange(new string[] { "SUBSYSTEM" });
            query.Where = Subsystem.Text;


            queryTask.ExecuteAsync(query);

Re: Find task timing out - only a few features

KarenEllett — Mon, 08 Jul 2013 18:13:07 GMT

It actually was a problem with the case sensitivity of the where clause, and I've got that part fixed. Now, however, none of the features will draw.

        private void QueryTask_ExecuteCompleted(object sender, QueryEventArgs args)
        {
            GraphicsLayer graphicsLayer = MapApplication.Current.Map.Layers["MyGraphicsLayer"] as GraphicsLayer;
            FeatureSet featureSet = args.FeatureSet;
            if (featureSet.Features.Count > 0)
            {
                foreach (Graphic resultFeature in featureSet.Features)
                {
                    resultFeature.Symbol = YellowLine;
                    graphicsLayer.Graphics.Add(resultFeature);

                }
                MessageBox.Show(featureSet.Features.Count.ToString() + " lines found");
            }
}