How to generate a polygon / polyline from user input

Question

In my app, there is a requirement to let the user add  features using xy coordinate pairs as input. I have been able to get the user XY input and generate a MapPoint & update it to SDE.
However, when it comes to polyline or polygon, the user inputs have been updated to an array of mappoints. But from that array I am unable to generate graphics or create a feature which could be updated in SDE.

This is the codeswitch(selectedFeatureLayer.layerDetails.geometryType)                 {                     case Geometry.POLYLINE:                     {                         Alert.show(myPointArray.toString(), myPointArray.length.toString());                                                  pline = new Polyline([myPointArray]);                         var myGraphicLine:Graphic = new Graphic;                         myGraphicLine.geometry = pline;                         myGraphicLine.symbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASHDOT,0x0000FF, 0.6,2);                         myGraphicsLayer.add(myGraphicLine);                                                   selectedFeatureLayer.applyEdits([myGraphicLine], null , null);                         break;                     }                                              case Geometry.POLYGON:                     { //                Get the points array and add the first point at the end of the array to make a polygon                                                  var onePointArray:Array = new Array;                         onePointArray=myPointArray[0];                         myPointArray.push([onePointArray]);                                                   //                Create polygon graphic                         poly = new Polygon([[myPointArray]]);                         myGraphicPoly.geometry = poly;                         myGraphicPoly.symbol = new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,0x00FF00, 0.7);                         myGraphicsLayer.add(myGraphicPoly);                            selectedFeatureLayer.applyEdits([myGraphicPoly], null , null);                                                  myPointArray = new Array;                         finishAdd.enabled = false;                             break;                     }                                              default:                     {                         break;                     }                 }

The user entered coordinates are stored in myPointArray. Trace shows that the pline / poly is not getting generated. How do I go about this? Whats the mistake?

IvanBespalov · Accepted Answer

Try this sample. 0) { addMessage(StringUtil.substitute("polyline created with length {0} km", lengths[0])); } addGraphic(pl); } protected function onCreatePolygon(event:MouseEvent):void { addMessage("Create polygon clicked"); var pts:Array = new Array(); for (var i:int; i < 10; i++) // add 10 random points to ring { var pt:MapPoint = new MapPoint(Math.random()*10000, Math.random()*10000, sr); pts.push(pt); } var pg:Polygon = new Polygon(new Array(pts), sr); var areas:Array = GeometryUtil.geodesicAreas(new Array(pg), Units.SQUARE_KILOMETERS); if (areas != null && areas.length > 0) { addMessage(StringUtil.substitute("polygon created with area {0} km²", Math.abs(areas[0]))); } addGraphic(pg); } private function addMessage(message:String):void { log.text = StringUtil.substitute("> > > {0} {1}", message, log.text); } private function addGraphic(geometry:Geometry):void { var gr:Graphic = new Graphic(geometry); grLayer.clear(); var grId:String = grLayer.add(gr); addMessage(StringUtil.substitute("graphic added with id='{0}'", grId)); map.initialExtent = geometry.extent; map.zoomToInitialExtent(); } ]]>