topic Re: Populate combo box in widget from Map Service Table (ArcGIS Server 10) in ArcGIS API for Flex Questions

Populate combo box in widget from Map Service Table (ArcGIS Server 10)

BarbaraPatterson — Wed, 20 Oct 2010 16:26:24 GMT

I'm creating a new widget with a series of combo boxes. The data source for each como box is a table that is part of a map service. Is it necessary to loop through the table and add the values to the combobox? Or can I just somehow reference the table using the QueryTask. Below is a snippet of my code showing what I'm trying to do. Any help or samples would be greatly appreciated!

Thanks, Barb Patteron

<fx: Declarations>
<esri:QueryTask id="queryApps"
      url="http://arcportal-gamma/ArcGIS/rest/services/MyMapService/MapServer/1"
      useAMF="false"/>
<esri:Query id="query"
     outFields="[AppScenario]"
     returnGeometry="false"
     />
</fx: Declarations>

Inside my widget template I have:
<mx:VBox>
     <mx:Label text="App Scenario"/>
     <mx:ComboBox id="App" labelField="" dataProvider="{queryApps.execute(query)}"/>
    </mx:VBox>

Re: Populate combo box in widget from Map Service Table (ArcGIS Server 10)

Drew — Sun, 12 Dec 2021 02:27:12 GMT

I don�??t believe that�??s possible. You need a �??complete�?� event handler.

You could have a helper function that would fill the combo box..

Sample (works)


 private function fillComboBoxWithData(cmb:ComboBox, displayFieldName:String, featureSet:FeatureSet):void
 {
  var results:ArrayCollection = new ArrayCollection();
  for each (var graphic:Graphic in featureSet.features)
  {
   var fieldValue:String = graphic.attributes[displayFieldName].toString(); 
   results.addItem({label: fieldValue, data:graphic});
  }
  cmb.labelField = "label";
  cmb.dataProvider = results;
 }

Drew

Re: Populate combo box in widget from Map Service Table (ArcGIS Server 10)

DanJensen — Mon, 25 Oct 2010 22:04:42 GMT

Barbara,

I think you will need to execute the query through a helper function, then it may be possible to bind the dataProvider property of the comboBox to the executeLastResult property of the query task.

Re: Populate combo box in widget from Map Service Table (ArcGIS Server 10)

NadeemShaukat — Mon, 06 Dec 2010 00:37:03 GMT

I'm creating a new widget with a series of combo boxes. The data source for each como box is a table that is part of a map service. Is it necessary to loop through the table and add the values to the combobox? Or can I just somehow reference the table using the QueryTask. Below is a snippet of my code showing what I'm trying to do. Any help or samples would be greatly appreciated!

Thanks, Barb Patteron

<fx: Declarations>
<esri:QueryTask id="queryApps"
      url="http://arcportal-gamma/ArcGIS/rest/services/MyMapService/MapServer/1"
      useAMF="false"/>
<esri:Query id="query"
     outFields="[AppScenario]"
     returnGeometry="false"
     />
</fx: Declarations>

Inside my widget template I have:
<mx:VBox>
     <mx:Label text="App Scenario"/>
     <mx:ComboBox id="App" labelField="" dataProvider="{queryApps.execute(query)}"/>
    </mx:VBox>

Barbara,

I see you were looking for a solution to populate a combobox with values from a table present in a map service. I am also trying to do the same thing to populate with values in a field of a feature class in a service. I also need to create this list of unique values.

Have you figured out how to do it. If so, please post a sample.

nshaukat

Re: Populate combo box in widget from Map Service Table (ArcGIS Server 10)

DanJensen — Mon, 06 Dec 2010 13:12:58 GMT

nshaukat,

Take a look at this thread for populating a combo box from a feature class field and ensuring they are unique and sorted.

http://forums.arcgis.com/threads/13929-how-to-query-with-combobox-with-Flex