Points inside Polygons using the DrawTool and display of number of points

ionarawilson1 — Wed, 18 Jul 2012 13:31:46 GMT

Hi,

I am developing a website that when you use the multipoint draw tool you click on one county or many counties, and it shows the companies in that county. There is a text area that displays how many icompanies have been selected. However this text area is just showing the records of the last selection. For example, let's say I select two counties, one with one company and another county with 5 companies. The text area will display "There is 1 matching record" but it should display "There are 6 matching records" as there are 6 companies displayed on the map. I believe it has something to do with the code on the onResult2 function but I haven't been able to find a solution. Thank you for any help!

   private function onDrawEnd(event:DrawEvent):void    {     drawToolbar.deactivate();      myGraphicsLayer.clear();     freehandbutton.selectedIndex = -1;     multipointbutton.selectedIndex = -1;     myMap.panEnabled = false;          if (event.graphic.geometry is Polygon)     {      var drawPolygon : Graphic = new Graphic();                   drawPolygon.geometry = event.graphic.geometry;      drawPolygon.autoMoveToTop = false; //keep graphics from moving to top               myPolygonGraphicsLayer.add(drawPolygon);       runQueryTask(event.graphic.geometry);     // If using point draw tool then run querytask3     } else{      //Must be multipoint      runQueryTask3(event.graphic.geometry);}                          }           [Bindable] private var queryTask3:QueryTask = new QueryTask();    [Bindable] private var query3:Query = new Query();       [Bindable] private var queryTask4:QueryTask = new QueryTask();    [Bindable] private var query4:Query = new Query();             private function runQueryTask3(geometry:Geometry):void    {     queryTask3.url = "http://tfs-24279/ArcGIS/rest/services/ForestProducts/county_forest_products/MapServer/0";     queryTask3.showBusyCursor = true;     queryTask3.useAMF = false;          query3.geometry = geometry;      //geometry from the drawToolbar     query3.returnGeometry = true;    //set to true because we want to place points on the map     query3.spatialRelationship = "esriSpatialRelIntersects";     query3.outSpatialReference = myMap.spatialReference;     query3.outFields = ['*'];         //run the query task     queryTask3.execute(query3, new AsyncResponder(onResult, onFault));          function onResult(featureSet:FeatureSet, token:Object = null):void     {             myGraphicslayer.clear()       myGraphicslayer.visible = true;       for each(var graphic : Graphic in featureSet.features)       {        graphic.symbol = fillSymbolmultipoint;         myGraphicslayer.add(graphic);                //Now run this query        //Of course this url needs to be to the layer that has your companies        queryTask4.url = "http://tfs-24279/ArcGIS/rest/services/ForestProducts/dynamic_layer_forest_products/MapServer/0";        queryTask4.showBusyCursor = true;        queryTask4.useAMF = false;                query4.geometry = graphic.geometry;      //geometry from the first query        query4.returnGeometry = true;    //set to true because we want to place points on the map        query4.spatialRelationship = "esriSpatialRelIntersects";        query4.outSpatialReference = myMap.spatialReference;        query4.outFields = ['*'];            //run the query task        queryTask4.execute(query4, new AsyncResponder(onResult2, onFault));       }                          }          function onResult2(featureSet:FeatureSet, token:Object = null):void     {                   //myGraphicslayer.clear()       myGraphicslayer.visible = true;       for each(var graphic : Graphic in featureSet.features){        graphic.symbol = resultsSymbol;         myGraphicslayer.add(graphic);              }            if (featureSet.features.length == 0) {        info.text = "There are no  records";       }       if (featureSet.features.length > 1) {        info.text = "There are " + featureSet.features.length + " matching records";       }       if (featureSet.features.length == 1) {        info.text = "There is " + featureSet.features.length + " matching record";       }          }                    function onFault(info:Object, token:Object = null):void     {      Alert.show(info.toString(), "Query Problem");     }    }

Re: Points inside Polygons using the DrawTool and display of number of points

ionarawilson1 — Wed, 18 Jul 2012 13:45:54 GMT

By the way, it seems that it has to do with the number of selected records. I selected 3 counties (one county with 1 company, the other county with 4 companies and the third county with 3 companies) , and no matter the sequence I select it always shows "There is 1 matching record" instead of "There are 8 matching records". How can I sum the total number of records selected? Is there a method I can use for that?

Thank you!!!

Re: Points inside Polygons using the DrawTool and display of number of points

ionarawilson1 — Wed, 18 Jul 2012 14:03:07 GMT

Trying a solution I added to the onResult2 function this

info.text = " There are" + myGraphicslayer.numGraphics + " matching records"

But the problem is that it adds the polygon graphics but I only want the points. Any ideas? Thanks

Re: Points inside Polygons using the DrawTool and display of number of points

ionarawilson1 — Wed, 18 Jul 2012 14:34:45 GMT

I found a solution! Instead of using the same graphic layer for queryTask4 I created another graphics layer (called myGraphicsLayer) and then changed the onResult2 to:

function onResult2(featureSet:FeatureSet, token:Object = null):void
    {


      //myGraphicslayer.clear()
      myGraphicslayer.visible = true;
      for each(var graphic : Graphic in featureSet.features){
       graphic.symbol = resultsSymbol;
       myGraphicsLayer.add(graphic);

     }

        if (myGraphicsLayer.numGraphics == 0) {
       info.text = "There are no records";
      }
      if (myGraphicsLayer.numGraphics > 1) {
       info.text = " There are" + myGraphicsLayer.numGraphics + " matching records";
      }
      if (myGraphicsLayer.numGraphics == 1) {
       info.text = " There is" + myGraphicsLayer.numGraphics + " matching record";
      }

    }

topic Points inside Polygons using the DrawTool and display of number of points in ArcGIS API for Flex Questions

Points inside Polygons using the DrawTool and display of number of points

Re: Points inside Polygons using the DrawTool and display of number of points

Re: Points inside Polygons using the DrawTool and display of number of points

Re: Points inside Polygons using the DrawTool and display of number of points