一、查询地图数据

<?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>
<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 -->
<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>
<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>
<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>