ArcGIS Server flex实现在线数据编辑

第一种方案

即将到来的arcgis 10，据说已经提供了数据修改的REST接口，但远水解不了近渴，通过flex客户端实现用户录入数据仍然是一个棘手的问题，本文提供了一种思路。

以点数据的录入为例：

arcgis服务器端通过AO实现数据的插入

public void savePoint(double x,double y) throws utomationException,IOException
{

IServerContext serverContext = getServerContext(ARCGIS_SERVER_NAME,ARCGIS_SERVER_USER,ARCGIS_SERVER_PASSWORD,ARCGIS_MAP_NAME,ARCGIS_SERVICE_NAME);
MapServer mapServer = (MapServer) serverContext.getServerObject();
ILayer editLayer = mapServer.getLayer("", LAYERID);
IFeatureLayer featureLayer = new IFeatureLayerProxy(editLayer);
IFeatureClass featureClass = featureLayer.getFeatureClass();
IFeature feature = featureClass.createFeature();
IPoint point = (IPoint)serverContext.createObject(Point.getClsid());
point.setX(x);
point.setY(y);
feature.setShapeByRef(point);
feature.store();
serverContext.releaseContext();

}

将AO逻辑包装成REST接口

@POST @Path("/save")
@Consumes("application/x-www-form-urlencoded")
@Produces("text/xml")
public String savePosition(@FormParam("x") double x,@FormParam("y") double y) throws UnknownHostException, IOException
{
aoService.savePoint(x,y);
return "ok";
}

flex端调用REST接口

private function drawEnd(event:DrawEvent):void

{

var outSR:SpatialReference = new SpatialReference(spatialref);
var geom:Geometry = event.graphic.geometry;
var gra:Graphic = new Graphic(geom);

var ptSym:SimpleMarkerSymbol = new SimpleMarkerSymbol("circle", numGraphic.value, cpGraphic.selectedColor);
gra.symbol = ptSym;
measurePt = geom as MapPoint;
savePoint(measurePt.x,measurePt.y);

}

private function savePoint(x:Number, y:Number):void
{
var aoService:HTTPService=new HTTPService();
var request:Object=new Object();
request.x=x;
request.y=y;
aoService.url="http://192.168.1.188:8080/rest/service/save";
aoService.request=request;
aoService.method="POST";
aoService.addEventListener(ResultEvent.RESULT, onSavePoint);
aoService.send();

}

需要注意的是，这种解决方案没有考虑多用户使用环境。

第二种方案：

目前在ArcGIS10没有正式推出之前，除了可以使用ADF做数据的在线编辑之外，可以使用OGC的WFS-T的服务来做在线编辑。
ESRI提供一整套的解决方案，大家可以参考以下相关教程

http://webhelp.esri.com/arcgisserver/9.3/dotNet/index.htm#tutorial_wfst_service.htm来发布WFS-T的服务。
然后参考wfs-t服务的白皮书，来编码实现地理数据的在线编辑，具体可以到OGC的网站上下载最新的包皮书，http://www.opengeospatial.org/standards/wfs，目前最新的版本是1.1.0.
以下是使用FLEX实现的在线添加对象，供大家参考：
<?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">

<mx:Script>
<![CDATA[
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import com.esri.ags.geometry.MapPoint;
import mx.controls.Alert;

private function onmapclick(event:MouseEvent):void
{
var mp:MapPoint = mymap.toMapFromStage(event.stageX,event.stageY);

var insert:XML=<wfs:Transaction
version="1.1.0"
service="WFS"
xmlns="http://nick/arcgis"
xmlns:gml="http://www.opengis.net/gml"
xmlns:ogc="http://www.opengis.net/ogc"
xmlns:wfs="http://www.opengis.net/wfs"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://nick/arcgis/services/Hospital/MapServer/WFSServerhttp://nick/arcgis/services/Hospital/MapServer/WFSServer?request=describefeaturetype&;typename=Hospital.xshttp://www.opengis.net/wfshttp://schemas.opengis.net/wfs/1.1.0/wfs.xsd">
<wfs:Insert>
<Hospital>
<SHAPE>
<gml:Point srsName="urn:ogc:def:crs:EPSG:6.9:4326">
<gml:pos>{mp.x} {mp.y}</gml:pos>
</gml:Point>
</SHAPE>
<shanghai_4>test01</shanghai_4>
</Hospital>
</wfs:Insert>
</wfs:Transaction>;
hs.send(insert);
}

private function onresult(event:ResultEvent) : void
{
var result:Object = event.result;

//Alert.show(result.toLocaleString() + "onResult")

var numInserted:int = result.TransactionResponse.TransactionSummary.totalInserted;
if( numInserted>0 )
{
mymap.getLayer("sh").refresh();
Alert.show("共"+numInserted+"个数据提交成功");
}
this.cursorManager.removeBusyCursor();
}

private function onfault(event:FaultEvent) : void
{
var result:Object = event.fault;
//Alert.show(result.toString()+ "onfault")
}
]]>
</mx:Script>

<mx:HTTPService id="hs" url="http://nick/arcgis/services/Hospital/MapServer/WFSServer" contentType="application/xml"
result="onresult(event)" fault="onfault(event)"/>

<esri:Map id="mymap" mapClick="onmapclick(event)">
<esri:ArcGISDynamicMapServiceLayer id="sh">
<esri:url>http://nick/ArcGIS/rest/services/Hospital/MapServer</esri:url>
</esri:ArcGISDynamicMapServiceLayer>
</esri:Map>

</mx:Application>