Latest Contributions by LiYao

Hello everybody, I have 2 layers in the map (1 polyline layer and 1 polygon layer), and a "select and zoom" function which will select a feature and zoom to it. The strange thing is although I use the same code(except the geometry type), the result is different: - for polygon feature : can select the feature and zoom to it properly. - for polyline feature : only zoom to the feature, but never select the feature. I cannot figure out why this happen, is this because of the layer data or something else? The code I am using is as follows: private function onSelectItem(e:ContextMenuEvent):void{     if(datagrid.selectedIndex >= 0){       this.cursorManager.setBusyCursor();               if (datagrid.selectedItem.shape == "Polyline")      {       var query:Query = new Query;       queryTask.url = "http://localhost:6080/arcgis/rest/services/MyService/MapServer/0";                      query.where = "Segment_ID = '" + datagrid.selectedItem.segmentID + "'";               query.outSpatialReference = map.spatialReference;       query.returnGeometry=true;      queryTask.execute(query, new AsyncResponder(onResult, onFault));       }      else if (datagrid.selectedItem.shape == "Polygon")      {       var queryP:Query = new Query;       queryTask.url = "http://localhost:6080/arcgis/rest/services/MyService/MapServer/1";       queryP.where = "Segment_ID = '" + datagrid.selectedItem.segmentID + "'";        queryP.outSpatialReference = map.spatialReference;       queryP.returnGeometry=true;       queryTask.execute(queryP, new AsyncResponder(onResultPolygon, onFault));       }                function onResult(featureSet:FeatureSet, token:Object = null):void       {        graphicsLayer.clear();        if (featureSet.features.length == 0)        {         Alert.show("No feature found. Please try again.");        }        else        {         var unionExtent:Extent;         var myFirstGraphic:Graphic = featureSet.features[0];         unionExtent = Polyline(myFirstGraphic.geometry).extent;                myFirstGraphic = new Graphic();               for each (var myGraphic1:Graphic in featureSet.features)         {          myFirstGraphic.geometry = myGraphic1.geometry;         graphicsLayer.add(myGraphic1);         if(myGraphic1.geometry !== myFirstGraphic.geometry){           unionExtent = unionExtent.union(Polyline(myGraphic1.geometry).extent);          }         }         map.extent = unionExtent;       }      }           function onResultPolygon(featureSet:FeatureSet, token:Object = null):void       {        graphicsLayer.clear();        if (featureSet.features.length == 0)        {         Alert.show("No feature found. Please try again.");        }        else        {         var unionExtent:Extent;         var myFirstGraphic:Graphic = featureSet.features[0];         unionExtent = Polygon(myFirstGraphic.geometry).extent;                myFirstGraphic = new Graphic();                    for each (var myGraphic1:Graphic in featureSet.features)         {          myFirstGraphic.geometry = myGraphic1.geometry;         graphicsLayer.add(myGraphic1);                  if(myGraphic1.geometry !== myFirstGraphic.geometry){           unionExtent = unionExtent.union(Polygon(myGraphic1.geometry).extent);          }         }        map.extent = unionExtent;       }      }      function onFault(info:Object, token:Object = null):void       {        Alert.show(info.toString());       } } I am using ArcGIS api for flex 3.6, thanks in advance. ... View more