arcgis for flex api version3.7 教程：3.如何使用QueryTask查询地图服务

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
   xmlns:s="library://ns.adobe.com/flex/spark"
   xmlns:mx="library://ns.adobe.com/flex/mx"
   xmlns:esri="http://www.esri.com/2008/ags">


<s:layout>
   <s:VerticalLayout gap="10"
   horizontalAlign="center"
   paddingBottom="20"
   paddingLeft="25"
   paddingRight="25"
   paddingTop="20"/>
</s:layout>


</s:Application>

...
paddingTop="20"/>
</s:layout>


<esri:Map id="myMap">
   <esri:extent>
      <esri:Extent xmin="-14298000" ymin="2748000" xmax="-6815000" ymax="7117000">
         <esri:SpatialReference wkid="102100"/>
      </esri:Extent>
   </esri:extent>
   
   <esri:ArcGISTiledMapServiceLayer 
      


url="http://server.arcgisonline.com/ArcGIS/rest/services/World_Physical_Map/MapServer"/


>
   <esri:GraphicsLayer id="myGraphicsLayer" 
      graphicProvider="{queryTask.executeLastResult.features}"/>
</esri:Map>


</s:Application>

<fx:Declarations>
<!-- Layer with US States -->
<esri:QueryTask id="queryTask"
   showBusyCursor="true"
   url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5"
   useAMF="false"/>
   <esri:Query id="query"
      outSpatialReference="{myMap.spatialReference}"
      returnGeometry="true"
      text="{qText.text}">
      
      <esri:outFields>
         <fx:String>MED_AGE</fx:String>
         <fx:String>POP2007</fx:String>
      </esri:outFields>
   </esri:Query>
</fx:Declarations>


<esri:Map id="myMap">
   <esri:extent>
...

...
   </esri:Query>


</fx:Declarations>
<s:Panel height="60" 
   backgroundColor="0xB2BFC6"
   title="Query a layer (search for a state)">


   <s:layout>
      <s:HorizontalLayout/>
   </s:layout>
   
   <s:TextInput id="qText"
      width="100%"
      enter="doQuery()"
      text="California"/>


   <s:Button click="doQuery()" label="Do Query"/>
</s:Panel>


<esri:Map id="myMap">
   <esri:extent>
   ...

paddingTop="20"/>
</s:layout>


<fx:Script>
   <![CDATA[
      import com.esri.ags.FeatureSet;
      import mx.controls.Alert;
      import mx.rpc.AsyncResponder;


   private function doQuery():void
   {
    queryTask.execute(query, new AsyncResponder(onResult, onFault));
   
    function onResult(featureSet:FeatureSet, token:Object = null):void
    {
      // No code needed in this simple sample, since the
      // graphics layer is bound to the query result using
      // graphicProvider="{queryTask.executeLastResult.features}"
    }


    function onFault(info:Object, token:Object = null):void
    {
     Alert.show(info.toString(), "Query Problem");
    }
   }
   ]]>
</fx:Script>


<fx:Declarations>
   <!-- Layer with US States -->

例如输入一个城市名称：California.

arcgis for flex api version3.7 教程：3.如何使用QueryTask查询地图服务

原文：http://blog.csdn.net/xiliangxiaoke/article/details/44671373