ArcGIS Server flex实现在线数据编辑

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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：

    xmlns:mx="http://www.adobe.com/2006/mxml"
    xmlns:esri="http://www.esri.com/2008/ags">
   
   
           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=       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">
           
               
                    
                        
                              {mp.x} {mp.y}
                        
                    
                     test01
               
           
       ;
    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")
           }
     ]]>
   
   
   
         result="onresult(event)" fault="onfault(event)"/>
   
   
   
    
      http://nick/ArcGIS/rest/services/Hospital/MapServer