topic Re: Record Count of a Feature Layer in ArcGIS API for Flex Questions

Record Count of a Feature Layer

ionarawilson1 — Fri, 20 Dec 2013 14:20:19 GMT

I am filtering a non-spatial feature service cast a feature layer. How can I get the record count after the search is complete? I know I can use the length of feature layer graphic provider if the feature layer is an actual feature layer. But how can I the number of records for a non-spatial table (named yourTable)? How can I modify the last line of the code snippet in this case?
Thank you so much in advance
Thanks

private function doSearch():void    {          myAttributeTable.featureLayer = myFeatureLayer         var defexpr:String =  searchattribute +  eqsymbol +  "'"  +  qText.text  + "'";      yourTable.definitionExpression = defexpr     myAttributeTable.featureLayer = yourTable     Alert.show(defexpr)     totalGraphicsShown = "Total records shown: " + (yourTable.graphicProvider as ArrayCollection).length

Re: Record Count of a Feature Layer

RobertScheitlin__GISP — Fri, 20 Dec 2013 14:31:09 GMT

Ionara,

The only way I know to make it work is to use the queryCount method to perform a query using the same SQL expression that you are setting for the defenitionExpression.

Re: Record Count of a Feature Layer

ionarawilson1 — Fri, 20 Dec 2013 14:32:24 GMT

Hi Robert,

Can you please post a code snippet of an example of a querycount just for me to have an idea how to use it? thank you!!!

Re: Record Count of a Feature Layer

RobertScheitlin__GISP — Fri, 20 Dec 2013 14:36:04 GMT

Ionara,

I don't have a code example. It is just like any query you would do against a layer. Look at the documentation link I posted and you will see that it is identical to other queries.

Re: Record Count of a Feature Layer

ionarawilson1 — Fri, 20 Dec 2013 14:36:50 GMT

Ok, I will try, Thank you!!!

Re: Record Count of a Feature Layer

ionarawilson1 — Sat, 11 Dec 2021 13:40:41 GMT

Robert,

I think I might be in the right track. Can you please tell me how I get the count of features and what url I put in the query task since I am query a feature layer? Do I even need a query task since I am not executing it? Thank you!

 var query:Query = new Query();
    query.where = defexpr
    query.returnGeometry = false;
    yourTable.queryCount(query, new AsyncResponder(onResult, onFault));
    
    
    function onResult(featureSet:FeatureSet,token:Object = null):void
    {
     
     
     
     
    }
    
    function onFault(info:Object, token:Object = null):void
    {
     
    }
    


  <esri:QueryTask id="queryTask"
      
      url="http://tfsgis-iisd01:6080/arcgis/rest/services/SARS_WILSON/RELATED_TABLES/MapServer/1"/>

Re: Record Count of a Feature Layer

RobertScheitlin__GISP — Fri, 20 Dec 2013 19:21:44 GMT

Ionara,

There is no need for a QueryTask and thus no need for a URL.

Re: Record Count of a Feature Layer

ionarawilson1 — Fri, 20 Dec 2013 20:35:19 GMT

Good, can you tell me if I am in the right track and how to get the count value? Would I just add
featureSet.features.length

to the result function?

Thank you!

Re: Record Count of a Feature Layer

RobertScheitlin__GISP — Sat, 11 Dec 2021 13:40:44 GMT

Ionara,

Try this...

function onResult(count:Number, token:Object):void
                {
                    trace(count);
                }

Re: Record Count of a Feature Layer

ionarawilson1 — Thu, 26 Dec 2013 12:50:48 GMT

Thank you Robert. I will try this when I go back to the office on the 6th.

Re: Record Count of a Feature Layer

ionarawilson1 — Sat, 11 Dec 2021 13:40:47 GMT

Hi Robert,

I tried that but I get "null RECORDS", when I run the search

   private function doSearch():void
   {
    
    
    myAttributeTable.featureLayer = myFeatureLayer
    
    var defexpr:String =  searchattribute +  eqsymbol +  "'"  +  qText.text  + "'";
//    var defexpr:String =  searchattribute +  eqsymbol +  "'"  +  qText.text  + zerotime + "'";
    yourTable.definitionExpression = defexpr
    myAttributeTable.featureLayer = yourTable
    Alert.show(defexpr)
     
    var query:Query = new Query();
    query.where = defexpr
    query.returnGeometry = false;
    
    yourTable.queryCount(query, new AsyncResponder(onResult, onFault));
    
    
    function onResult(count:Number, token:Object):void
    {
     var countstring:String
     countstring = count as String;
     numberofrecords.text = countstring + " RECORDS" ;
    
    }
    
    function onFault(info:Object, token:Object = null):void
    {
     
    }

}

And the mxml:

   <mx:Text width="65" id="numberofrecords"
      text="test"/>

Re: Record Count of a Feature Layer

ionarawilson1 — Thu, 16 Jan 2014 19:00:41 GMT

This is what worked for me:

var defexpr6:String =  "DateComplete >= " +   "'"  +  date1.text  + "'" + " AND DateComplete <= " + "'"  +  date2.text  + "'";      //    var defexpr:String =  searchattribute +  eqsymbol +  "'"  +  qText.text  + zerotime + "'";      yourTable.definitionExpression = defexpr6      myAttributeTable.featureLayer = yourTable      myAttributeTable.visible = true;      Alert.show(defexpr6)      query.where = defexpr6;      query.objectIds=[];      query.returnGeometry = false;      queryTask.executeForIds(query);     var objectIdsArray = [];    function  executeForIdsOnResult(event:QueryEvent):void         {          queryTask.removeEventListener(QueryEvent.EXECUTE_FOR_IDS_COMPLETE,executeForIdsOnResult);     objectIdsArray = event.objectIds;     numberofrecords.text = objectIdsArray.length.toString();         }

And the mxml

 <esri:QueryTask id="queryTask"       url="http://tfsgis-iisd01:6080/arcgis/rest/services/SARS_WILSON/RELATED_TABLES/FeatureServer/1"       executeForIdsComplete="executeForIdsOnResult(event)"       useAMF="false"              />   <esri:Query id="query"      outFields=""       returnGeometry="false"      />           <mx:Text width="65" id="numberofrecords"         text="test"/>