topic Re: SFV 1.3 layerDefinitions problem in ArcGIS API for Flex Questions

SFV 1.3 layerDefinitions problem

DavideRodomonti1 — Sun, 29 Aug 2010 14:14:45 GMT

Hi all, I used in my website a layer definition to filter a layer.
It works great...
Inside this layer I have shape overlapped and my problem is that when I use Select by point (searchWidget tool) I select ALL the overlapped shape...but I wish I could select just what I see...
Can I store somehow the layerDefinitions query or can I get layerDefinitions values to add to queryTask?

Thanks

David

Re: SFV 1.3 layerDefinitions problem

RobertScheitlin__GISP — Sat, 11 Dec 2021 16:34:29 GMT

Davide,

Yes you can use existing layerDefinitions and just append them to your query as I demonstrate in this sample.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application
    xmlns:mx="http://www.adobe.com/2006/mxml"
    xmlns:esri="http://www.esri.com/2008/ags"
    pageTitle="Example - adding a layerDefinition to a query">


 <esri:QueryTask id="queryTask"
      showBusyCursor="true"
         url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5" />
    <esri:Query id="query" returnGeometry="true" outSpatialReference="{map.spatialReference}">
        <esri:outFields>
            <mx:String>*</mx:String>
        </esri:outFields>
    </esri:Query>
    
    <mx:Script>
     <![CDATA[
      private function execQuery():void
      {
                        //dyn.layerDefinitions[5] number five is the states layer that we are using in the queryTask.
       query.where = "UPPER(STATE_NAME) = '" + txtInput.text.toUpperCase() + "' AND " + dyn.layerDefinitions[5];
       queryTask.execute(query);
      }
     ]]>
    </mx:Script>
     
 <mx:HBox width="100%" height="28" backgroundAlpha="1" backgroundColor="#B6B7C0"
     verticalAlign="middle" paddingLeft="10" paddingRight="10" borderStyle="solid" borderThickness="1">
  <mx:Label text="Query with definition expression"  color="#000000"/>
        <mx:TextInput id="txtInput" text="Mississippi" enter="execQuery()" color="#000000"/>
        <!-- Use Spacer to push Button control to the right. -->
        <mx:Spacer width="100%"/>
        <mx:Button label="Search" click="execQuery()" color="#000000"/> 
 </mx:HBox>
    <esri:Map id="map">
        <esri:extent>
            <esri:Extent xmin="-150" ymin="5" xmax="-50" ymax="68">
                <esri:SpatialReference wkid="4326"/>
            </esri:Extent>
        </esri:extent>
        <esri:ArcGISTiledMapServiceLayer
            url="http://server.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>
        <esri:ArcGISDynamicMapServiceLayer id="dyn"
            url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer">
            <esri:layerDefinitions>
                <!-- Layers in the order 0..x of the map service -->
                <mx:Array>
                    <mx:String></mx:String> <!-- Census block points -->
                    <mx:String></mx:String> <!-- Census block groups -->
                    <mx:String></mx:String>  <!-- Counties -->
                    <mx:String><![CDATA[ AGE_UNDER5 + AGE_5_17 > AGE_50_64 + AGE_65_UP ]]></mx:String>  <!-- Coarse Counties -->
                    <mx:String><![CDATA[ AGE_UNDER5 + AGE_5_17 > AGE_50_64 + AGE_65_UP ]]></mx:String>  <!-- Detailed Counties -->
                    <mx:String><![CDATA[ AGE_UNDER5 + AGE_5_17 > AGE_50_64 + AGE_65_UP ]]></mx:String>  <!-- States -->
                 </mx:Array>
            </esri:layerDefinitions>
        </esri:ArcGISDynamicMapServiceLayer>
        <esri:GraphicsLayer id="myGraphicsLayer" graphicProvider="{queryTask.executeLastResult.features}"/>
    </esri:Map>
</mx:Application>

Re: SFV 1.3 layerDefinitions problem

DavideRodomonti1 — Sat, 11 Dec 2021 16:34:32 GMT

Davide,

Yes you can use existing layerDefinitions and just append them to your query as I demonstrate in this sample.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application
    xmlns:mx="http://www.adobe.com/2006/mxml"
    xmlns:esri="http://www.esri.com/2008/ags"
    pageTitle="Example - adding a layerDefinition to a query">


 <esri:QueryTask id="queryTask"
      showBusyCursor="true"
         url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5" />
    <esri:Query id="query" returnGeometry="true" outSpatialReference="{map.spatialReference}">
        <esri:outFields>
            <mx:String>*</mx:String>
        </esri:outFields>
    </esri:Query>
    
    <mx:Script>
     <![CDATA[
      private function execQuery():void
      {
                        //dyn.layerDefinitions[5] number five is the states layer that we are using in the queryTask.
       query.where = "UPPER(STATE_NAME) = '" + txtInput.text.toUpperCase() + "' AND " + dyn.layerDefinitions[5];
       queryTask.execute(query);
      }
     ]]>
    </mx:Script>
     
 <mx:HBox width="100%" height="28" backgroundAlpha="1" backgroundColor="#B6B7C0"
     verticalAlign="middle" paddingLeft="10" paddingRight="10" borderStyle="solid" borderThickness="1">
  <mx:Label text="Query with definition expression"  color="#000000"/>
        <mx:TextInput id="txtInput" text="Mississippi" enter="execQuery()" color="#000000"/>
        <!-- Use Spacer to push Button control to the right. -->
        <mx:Spacer width="100%"/>
        <mx:Button label="Search" click="execQuery()" color="#000000"/> 
 </mx:HBox>
    <esri:Map id="map">
        <esri:extent>
            <esri:Extent xmin="-150" ymin="5" xmax="-50" ymax="68">
                <esri:SpatialReference wkid="4326"/>
            </esri:Extent>
        </esri:extent>
        <esri:ArcGISTiledMapServiceLayer
            url="http://server.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>
        <esri:ArcGISDynamicMapServiceLayer id="dyn"
            url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer">
            <esri:layerDefinitions>
                <!-- Layers in the order 0..x of the map service -->
                <mx:Array>
                    <mx:String></mx:String> <!-- Census block points -->
                    <mx:String></mx:String> <!-- Census block groups -->
                    <mx:String></mx:String>  <!-- Counties -->
                    <mx:String><![CDATA[ AGE_UNDER5 + AGE_5_17 > AGE_50_64 + AGE_65_UP ]]></mx:String>  <!-- Coarse Counties -->
                    <mx:String><![CDATA[ AGE_UNDER5 + AGE_5_17 > AGE_50_64 + AGE_65_UP ]]></mx:String>  <!-- Detailed Counties -->
                    <mx:String><![CDATA[ AGE_UNDER5 + AGE_5_17 > AGE_50_64 + AGE_65_UP ]]></mx:String>  <!-- States -->
                 </mx:Array>
            </esri:layerDefinitions>
        </esri:ArcGISDynamicMapServiceLayer>
        <esri:GraphicsLayer id="myGraphicsLayer" graphicProvider="{queryTask.executeLastResult.features}"/>
    </esri:Map>
</mx:Application>

Thanks so much Robert...but where can I put this if I use Graphic Search in the following code?

private function queryFeaturesGraphical(geom:Geometry):void
   {
    var i:Number = cboLayerGraphical.selectedIndex;
    var querySpatialRel:String = "esriSpatialRelIntersects";
    queryLayer = configSearchGraphical.url;
    queryGeom = geom;
    queryFields = configSearchGraphical.fields;
    queryTitleField = configSearchGraphical.titlefield;
    queryLinkField = configSearchGraphical.linkfield;
    
    if (queryLayer)
    {
     var queryTask:QueryTask = new QueryTask(queryLayer);
     var query:Query = new Query();
     query.geometry = queryGeom;
     query.outFields = queryFields.split(",");
     query.returnGeometry = true;
     query.spatialRelationship = querySpatialRel;
     query.outSpatialReference = map.spatialReference;
     queryTask.execute(query, new AsyncResponder(onResult, onFault));  
     showMessage(loadingLabel, true); 
     showStateResults(null);   
     
     // on result
     function onResult(featureSet:FeatureSet, token:Object = null):void                
     {   
      try
      {
       var recAC:ArrayCollection = createRecordData(featureSet,"");
       addSharedData(widgetTitle, recAC);
       wRepeater.dataProvider = recAC;
       showMessage(selectionLabel + " " + featureSet.features.length, false);
       //Davide

      }
      catch (error:Error)
      {
       showMessage(error.message, false);
      } 
     }
     
     //on fault
     function onFault(info:Object, token:Object = null) : void
     {                    
      showMessage(info.toString(), false);         
     }
    }  
   }

Re: SFV 1.3 layerDefinitions problem

RobertScheitlin__GISP — Sat, 11 Dec 2021 16:34:35 GMT

Davide,

OK, helps to be specific. Add this

//Loop though the map layers to find one that matches the searchwidgets selected layer
     for each(var layer:* in map.layers)
     {
      //Check to see if this particular map service layer has the same url as
      //the one selected by the searchWidget, minus the layer designator
      //If the urls match then use the layer designator to get the appropriate
      //layerDefinition and add it to the querys where clause
      if(layer is ArcGISDynamicMapServiceLayer || layer is ArcGISTiledMapServiceLayer)
       if(layer.url == queryLayer.substring(0,queryLayer.lastIndexOf("/"))){
        if(layer.layerDefinitions)
        {
         query.where = layer.layerDefinitions[parseInt(queryLayer.substring(queryLayer.lastIndexOf("/")+ 1))];
         trace(query.where);
        }
       }
     }

Re: SFV 1.3 layerDefinitions problem

DavideRodomonti1 — Sat, 11 Dec 2021 16:34:37 GMT

Davide,

OK, helps to be specific. Add this

//Loop though the map layers to find one that matches the searchwidgets selected layer
     for each(var layer:* in map.layers)
     {
      //Check to see if this particular map service layer has the same url as
      //the one selected by the searchWidget, minus the layer designator
      //If the urls match then use the layer designator to get the appropriate
      //layerDefinition and add it to the querys where clause
      if(layer is ArcGISDynamicMapServiceLayer || layer is ArcGISTiledMapServiceLayer)
       if(layer.url == queryLayer.substring(0,queryLayer.lastIndexOf("/"))){
        if(layer.layerDefinitions)
        {
         query.where = layer.layerDefinitions[parseInt(queryLayer.substring(queryLayer.lastIndexOf("/")+ 1))];
         trace(query.where);
        }
       }
     }

Thanks u Robert!!
Wonderful...it perfectly works...

😉

Davide