Using Full Extent or Geometry to query points based on poly

NathalieNeagle

I have one combo box (drop down Menu) name PolySels and another combo box (drop down Menu) name PointsSelected

I want my end users to select a Polygon from the PolySels combo box and a Point Layer from the combo box PointsSelected and have my application preform a spatial selection on the points layer. Select all the points within the poly.

I think I have everything set up but I'm having trouble finishing my query selection code and I was wonder if some could help. I've checked out other post and just can't seem to figure it out.

  private void ExecuteSpatialSelectionButton_Click(object sender, RoutedEventArgs e)
        {

            GraphicsLayer selectionGraphicslayer = Map.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
            selectionGraphicslayer.ClearGraphics();

            //My Point layer that will be queried 
            QueryTask queryTask = new QueryTask((PointsSelected.SelectedItem as FeatureLayer).Url);

            queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;
            queryTask.Failed += QueryTask_Failed;

            Query query = new ESRI.ArcGIS.Client.Tasks.Query();

            //Specify fields to return from query...all fields
            query.OutFields.Add("*");


         

//Here's where I'm having problems: I can't figure out how to set the second combo box (the polygon selected layer) to a graphic layer or maybe it needs to be a featurelayer?? 

            GraphicsLayer polyGraphicLayer = new GraphicsLayer((PolySels.SelectedItem as GraphicsLayer).Url);
          

  //FeatureLayer polyFeatureLayer = new FeatureLayer((PolySels.SelectedItem as FeatureLayer).Url);
           

           //Here's the second part that is confusing me based on what I do above should I preform my query with the graphiclayer and use the fullextent or with the feature layer and use the geometry??

            query.Geometry = polyGraphicLayer.FullExtent;
           

           // query.SpatialRelationship = SpatialRelationship.esriSpatialRelContains;

       //     query.Geometry = polyFeatureLayer.Geometry;





            // Return geometry with result features
            query.ReturnGeometry = true;

            queryTask.ExecuteAsync(query);


        }

Thanks in advance.
Nathalie

NathalieNeagle

OK,
I think my first problem was I was setting the query.geometry to a map Layer index and I really wanted to set it to a sublayer?? I have 4 base layers and one dynamic service which has like 20 layers in it and I want to have it work off one of the dynamic layer...based off of the dropdown.

I change my code to this

     private void ExecuteSpatialSpeciesNameButton_Click(object sender, RoutedEventArgs e)
        {

            GraphicsLayer selectionGraphicslayer = Map.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
            selectionGraphicslayer.ClearGraphics();


            QueryTask queryTask = new QueryTask((Layers.SelectedItem as FeatureLayer).Url);

            queryTask.ExecuteCompleted += QuerySpa_ExecuteCompleted;
            queryTask.Failed += QuerySpa_Failed;

            Query query = new ESRI.ArcGIS.Client.Tasks.Query();

            query.OutFields.Add("*");


            GraphicsLayer polygonGraphicsLayer = Map.Layers["MyPolygonGraphicsLayer"] as GraphicsLayer;
            
//--------------HERE"S MY CHANGE INSTEAD OF POINT TO A MAP LAYER I"M SETTING IT TO A SERVICE --------------------------------------------------------------

            string baseUrl = "http://servername/ArcGIS/rest/services/servicename/MapServer";

            FeatureLayer featureLayermodel = new FeatureLayer() { Url = string.Format("{0}/{1}", baseUrl, PolySels.SelectedIndex) };
            
            featureLayermodel.Initialize();
    

  //  query.Geometry = featureLayermodel.Graphics[0].Geometry;


//-----------THIS RETURNS NOTHING -----SEE BELOW FOR ERROR ----//
            query.Geometry = featureLayermodel.FullExtent;

          

            // Return geometry with result features
            query.ReturnGeometry = true;

            queryTask.ExecuteAsync(query);

           
            

        }

So in my code I have the line:
  query.Geometry = featureLayermodel.FullExtent;
and it returns the error

{"error":{"code":400,"message":"Unable to complete operation.","details":["'where' parameter not specified","'objectIds' parameter not specified","'time' parameter not specified","'geometry' parameter not specified","'text' parameter not specified","Unable to complete Query operation."]}}

Looks like for some reason it is not grabbing any geometry...Do not no why.

Per a suggestion on another post (Dominique suggested it)
If I go with this line
query.Geometry = featureLayermodel.Graphics[0].Geometry;
It just errors and I can see my geometry in fiddler is
{"xmin":-180,"ymin":0,"xmax":0,"ymax":90}
Which makes no sense, Dominique mentioned in the other post about having only one polygon in the layer featureLayermodel.Graphics[0].Geometry and I'm not sure how many polys there are so maybe that my issue.