nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Geoprocessing widget bufferPoint problem

fatizanady

I tried to develop a geoprocessing widget which allows to establish buffers around points from my map service.
on "onResult" function I encounter this problem:

"Access to the property parameterValues ??????perhaps not defined through a reference with static type com.esri.ags.tasks.supportClasses: ExecuteResult."

I don't understand this error , someone can help me please I am a beginner programming flex and I have a great desire to make this work.Thanks for any help that could be offered!

this is the entire code:

 <?xml version="1.0" encoding="utf-8"?> <!-- /////////////////////////////////////////////////////////////////////////// // Copyright (c) 2010-2011 Esri. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // //    http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /////////////////////////////////////////////////////////////////////////// --> <viewer:BaseWidget 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:viewer="com.esri.viewer.*"        xmlns:esri="http://www.esri.com/2008/ags"        creationComplete="init()">     <fx:Script>         <![CDATA[    import com.esri.ags.FeatureSet;    import com.esri.ags.events.GeoprocessorEvent;    import com.esri.ags.layers.GraphicsLayer;    import com.esri.ags.tasks.supportClasses.ExecuteResult;    import com.esri.ags.tasks.supportClasses.LinearUnit;    import com.esri.ags.tasks.supportClasses.ParameterValue;    import mx.controls.Alert;    import mx.rpc.AsyncResponder;            public var graphiclayer:GraphicsLayer=new GraphicsLayer();    private var mybufferdistance:LinearUnit= new LinearUnit();            private function init():void    {     myGraphicsLayer.clear();     graphiclayer=new GraphicsLayer();     graphiclayer.symbol= buffpointSimpleFill;     map.addLayer(graphiclayer);    }                 private function createRequestObject():Object    {      var myfeatureset:FeatureSet=new FeatureSet();      mybufferdistance.distance=Number(bufferdistance.text);      mybufferdistance.units="esriMeters";            var params:Object=      {             "GPBuffer_DBO_points": myfeatureset,       "Distance_ ":  mybufferdistance      }           return params;        }        private function buffer():void    {      var params:Object=createRequestObject();      gp.execute(params,new AsyncResponder(onResult, onFault));            function onResult(gpResultat:ExecuteResult=null,token:Object=null):void      {        var pv:ParameterValue=gpResultat.parameterValues[0];     var fs:FeatureSet=pv.value as FeatureSet;     graphiclayer.graphicProvider=fs.features;            }            function onFault(info:Object,token:Object=null):void      {          Alert.show(info.tostring());       graphiclayer.clear();             }            }        private function DoClear():void    {            graphiclayer.clear();       }                                     ]]>     </fx:Script>    <fx:Declarations>      <esri:SimpleFillSymbol id="buffpointSimpleFill"           alpha="0.5"           color="0xFF0000">    <esri:SimpleLineSymbol width="1"            alpha="0.5"            color="0x000000"/>   </esri:SimpleFillSymbol>      <esri:Geoprocessor id="gp"             url="http://localhost:6080/arcgis/rest/services/Geotraitement/BufferPoint/GPServer/BufferPoint" useAMF="false"/>        </fx:Declarations>    <esri:GraphicsLayer id="myGraphicsLayer"/>       <viewer:WidgetTemplate id="MyTestWidget"                            width="300" height="300">   <s:TextInput x="86" y="76" id="bufferdistance"/>   <s:Button x="114" y="149" label="buffer" click="buffer()"/>   <s:Button x="115" y="212" label="Clear" click="DoClear()"/>               </viewer:WidgetTemplate> </viewer:BaseWidget>

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Accepted answers

RobertScheitlin__GISP

Fati,

Here is an example widget (basically your with several fixes):

It queries an esri sample mapservice to get the points to buffer.
The widgets UI/UX has been improved.

<?xml version="1.0" encoding="utf-8"?> <!-- /////////////////////////////////////////////////////////////////////////// // Copyright (c) 2010-2011 Esri. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // //    http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /////////////////////////////////////////////////////////////////////////// --> <viewer:BaseWidget 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:viewer="com.esri.viewer.*"                    xmlns:esri="http://www.esri.com/2008/ags"                    creationComplete="init()">     <fx:Script>         <![CDATA[             import com.esri.ags.FeatureSet;             import com.esri.ags.events.LayerEvent;             import com.esri.ags.layers.FeatureLayer;             import com.esri.ags.layers.GraphicsLayer;             import com.esri.ags.tasks.supportClasses.ExecuteResult;             import com.esri.ags.tasks.supportClasses.LinearUnit;             import com.esri.ags.tasks.supportClasses.ParameterValue;             import com.esri.ags.tasks.supportClasses.Query;             import com.esri.viewer.utils.ErrorMessageUtil;                          import mx.controls.Alert;             import mx.rpc.AsyncResponder;                          [Bindable]             private var msgVisible:Boolean = false;             [Bindable]             public var graphiclayer:GraphicsLayer=new GraphicsLayer();                          private var mybufferdistance:LinearUnit= new LinearUnit();             private var queryLayer:FeatureLayer;             private var myfeatureset:FeatureSet;             [Bindable] private var bufferLyrLen:int;                          private function init():void             {                 graphiclayer=new GraphicsLayer();                 graphiclayer.symbol= buffpointSimpleFill;                 map.addLayer(graphiclayer);                                  queryLayer = new FeatureLayer();                 queryLayer.addEventListener(LayerEvent.LOAD, queryLayer_loadHandler);                 queryLayer.addEventListener(LayerEvent.LOAD_ERROR, queryLayer_loadErrorHandler);                 queryLayer.url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Louisville/LOJIC_PublicSafety_Louisville/MapServer/2";                 queryLayer.outFields = ["*"];             }                          private function queryLayer_loadHandler(event:LayerEvent):void             {                 queryLayer.removeEventListener(LayerEvent.LOAD, queryLayer_loadHandler);                 queryLayer.removeEventListener(LayerEvent.LOAD_ERROR, queryLayer_loadErrorHandler);                  var query:Query = new Query();                 query.where = "1=1";                 query.outSpatialReference = map.spatialReference;                                  queryLayer.queryFeatures(query, new AsyncResponder(onResult, onFault));                                  function onResult(featureSet:FeatureSet, token:Object = null):void                 {                     myfeatureset = featureSet;                     bufferBtn.enabled = true;                 }                                  function onFault(info:Object, token:Object = null):void                 {                     showMessage(info.toString(), false);                 }             }                          private function queryLayer_loadErrorHandler(event:LayerEvent):void             {                 queryLayer.removeEventListener(LayerEvent.LOAD, queryLayer_loadHandler);                 queryLayer.removeEventListener(LayerEvent.LOAD_ERROR, queryLayer_loadErrorHandler);                                  var errorMessage:String = getDefaultString("layerFailedToLoad",                     event.layer.name,                     ErrorMessageUtil.makeHTMLSafe(ErrorMessageUtil.buildFaultMessage(event.fault)));                                  showError(errorMessage);             }                          private function showMessage(msg:String, swfVisible:Boolean):void             {                 txtMessage.text = msg;                 swfMessage.visible = swfVisible;                 msgVisible = true;             }                          private function createRequestObject():Object             {                 mybufferdistance.distance=Number(bufferdistance.text);                 mybufferdistance.units="esriMeters";                                  var params:Object=                 {                     "GPBuffer_DBO_points": myfeatureset,             "Distance_":  mybufferdistance                 }                                  return params;             }                          private function buffer():void             {                 var params:Object=createRequestObject();                 gp.execute(params,new AsyncResponder(onResult, onFault));                                  function onResult(gpResultat:ExecuteResult=null,token:Object=null):void                 {                     var pv:ParameterValue = gpResultat.results[0];                     var fs:FeatureSet = pv.value as FeatureSet;                     graphiclayer.graphicProvider=fs.features;                     bufferLyrLen = graphiclayer.numGraphics;                     msgVisible = true;                     zoomAll();                 }                                  function onFault(info:Object,token:Object=null):void                 {                     Alert.show(info.toString());                     graphiclayer.clear();                                      }             }                          private function clearBuffer():void             {                 bufferLyrLen = 0;                 graphiclayer.clear();                         }                          private function zoomAll():void             {                 if(myfeatureset.features){                     if (myfeatureset.features.length == 1                         && myfeatureset.features[0].geometry.type == Geometry.MAPPOINT){                         var mp:MapPoint = myfeatureset.features[0].geometry as MapPoint;                         map.zoom(1 / 16, mp);                         map.centerAt(mp);                     }else{                         var graphicsExtent:Extent = GraphicUtil.getGraphicsExtent(myfeatureset.features);                         if(graphicsExtent){                             map.zoomTo(graphicsExtent.expand(1.2));                         }else{                             var mp2:MapPoint = myfeatureset.features[0].geometry as MapPoint;                             map.zoom(1 / 16, mp2);                             map.centerAt(mp2);                         }                     }                 }             }         ]]>     </fx:Script>          <fx:Declarations>         <esri:SimpleFillSymbol id="buffpointSimpleFill"                                alpha="0.5"                                color="0xFF0000">             <esri:SimpleLineSymbol width="1"                                    alpha="0.5"                                    color="0x000000"/>         </esri:SimpleFillSymbol>                  <esri:Geoprocessor id="gp"                               url="http://localhost:6080/arcgis/rest/services/Geotraitement/BufferPoint/GPServer/BufferPoint" useAMF="false"/>     </fx:Declarations>          <viewer:WidgetTemplate id="MyTestWidget"                            width="400" height="200">         <viewer:layout>             <s:VerticalLayout horizontalAlign="center" verticalAlign="top"/>         </viewer:layout>         <s:HGroup id="boxMessage"                   width="100%"                   includeInLayout="{msgVisible}"                   visible="{msgVisible}">             <mx:Image id="swfMessage"                       source="assets/images/loader.swf"                       visible="false"/>             <s:Label id="txtMessage"                      width="90%"                      text=""/>             <s:Label buttonMode="true" textAlign="right"                      click="clearBuffer()"                      fontWeight="bold"                      includeInLayout="{bufferLyrLen &gt; 0}"                      text="Clear Buffers"                      textDecoration="underline"                      visible="{bufferLyrLen &gt; 0}"/>         </s:HGroup>         <s:HGroup width="100%" verticalAlign="middle" horizontalAlign="left" paddingTop="5">             <s:Label text="Enter the Buffer distance" />             <s:TextInput x="86" y="76" id="bufferdistance" text="1000"/>         </s:HGroup>         <s:HGroup horizontalAlign="right" width="100%" height="100%" verticalAlign="bottom">             <s:Button x="114" y="149" id="bufferBtn" label="Buffer Features..." click="buffer()" enabled="false"/>         </s:HGroup>     </viewer:WidgetTemplate> </viewer:BaseWidget>

All comments

fatizanady

hi rscheitlin,

I find no words to thank you. you save my life

.
I am forced to work with geoprocessing services because it's my topic in graduation project. thank you to correct the faults of the code and complete it I promise you to make more effort. thank you again. 🙂

RobertScheitlin__GISP

Michael,

No, this is dependant on the user have a GP Service that has these exact parameters and would only buffer the Traffic Cameras from the Louisville Public Safety Map Service.

mvolz47

Robert:

How would you add your widget shown in this post to a compiled Flex app?

RobertScheitlin__GISP

Fati,

Here is an example widget (basically your with several fixes):

It queries an esri sample mapservice to get the points to buffer.
The widgets UI/UX has been improved.

<?xml version="1.0" encoding="utf-8"?> <!-- /////////////////////////////////////////////////////////////////////////// // Copyright (c) 2010-2011 Esri. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // //    http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /////////////////////////////////////////////////////////////////////////// --> <viewer:BaseWidget 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:viewer="com.esri.viewer.*"                    xmlns:esri="http://www.esri.com/2008/ags"                    creationComplete="init()">     <fx:Script>         <![CDATA[             import com.esri.ags.FeatureSet;             import com.esri.ags.events.LayerEvent;             import com.esri.ags.layers.FeatureLayer;             import com.esri.ags.layers.GraphicsLayer;             import com.esri.ags.tasks.supportClasses.ExecuteResult;             import com.esri.ags.tasks.supportClasses.LinearUnit;             import com.esri.ags.tasks.supportClasses.ParameterValue;             import com.esri.ags.tasks.supportClasses.Query;             import com.esri.viewer.utils.ErrorMessageUtil;                          import mx.controls.Alert;             import mx.rpc.AsyncResponder;                          [Bindable]             private var msgVisible:Boolean = false;             [Bindable]             public var graphiclayer:GraphicsLayer=new GraphicsLayer();                          private var mybufferdistance:LinearUnit= new LinearUnit();             private var queryLayer:FeatureLayer;             private var myfeatureset:FeatureSet;             [Bindable] private var bufferLyrLen:int;                          private function init():void             {                 graphiclayer=new GraphicsLayer();                 graphiclayer.symbol= buffpointSimpleFill;                 map.addLayer(graphiclayer);                                  queryLayer = new FeatureLayer();                 queryLayer.addEventListener(LayerEvent.LOAD, queryLayer_loadHandler);                 queryLayer.addEventListener(LayerEvent.LOAD_ERROR, queryLayer_loadErrorHandler);                 queryLayer.url = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Louisville/LOJIC_PublicSafety_Louisville/MapServer/2";                 queryLayer.outFields = ["*"];             }                          private function queryLayer_loadHandler(event:LayerEvent):void             {                 queryLayer.removeEventListener(LayerEvent.LOAD, queryLayer_loadHandler);                 queryLayer.removeEventListener(LayerEvent.LOAD_ERROR, queryLayer_loadErrorHandler);                  var query:Query = new Query();                 query.where = "1=1";                 query.outSpatialReference = map.spatialReference;                                  queryLayer.queryFeatures(query, new AsyncResponder(onResult, onFault));                                  function onResult(featureSet:FeatureSet, token:Object = null):void                 {                     myfeatureset = featureSet;                     bufferBtn.enabled = true;                 }                                  function onFault(info:Object, token:Object = null):void                 {                     showMessage(info.toString(), false);                 }             }                          private function queryLayer_loadErrorHandler(event:LayerEvent):void             {                 queryLayer.removeEventListener(LayerEvent.LOAD, queryLayer_loadHandler);                 queryLayer.removeEventListener(LayerEvent.LOAD_ERROR, queryLayer_loadErrorHandler);                                  var errorMessage:String = getDefaultString("layerFailedToLoad",                     event.layer.name,                     ErrorMessageUtil.makeHTMLSafe(ErrorMessageUtil.buildFaultMessage(event.fault)));                                  showError(errorMessage);             }                          private function showMessage(msg:String, swfVisible:Boolean):void             {                 txtMessage.text = msg;                 swfMessage.visible = swfVisible;                 msgVisible = true;             }                          private function createRequestObject():Object             {                 mybufferdistance.distance=Number(bufferdistance.text);                 mybufferdistance.units="esriMeters";                                  var params:Object=                 {                     "GPBuffer_DBO_points": myfeatureset,             "Distance_":  mybufferdistance                 }                                  return params;             }                          private function buffer():void             {                 var params:Object=createRequestObject();                 gp.execute(params,new AsyncResponder(onResult, onFault));                                  function onResult(gpResultat:ExecuteResult=null,token:Object=null):void                 {                     var pv:ParameterValue = gpResultat.results[0];                     var fs:FeatureSet = pv.value as FeatureSet;                     graphiclayer.graphicProvider=fs.features;                     bufferLyrLen = graphiclayer.numGraphics;                     msgVisible = true;                     zoomAll();                 }                                  function onFault(info:Object,token:Object=null):void                 {                     Alert.show(info.toString());                     graphiclayer.clear();                                      }             }                          private function clearBuffer():void             {                 bufferLyrLen = 0;                 graphiclayer.clear();                         }                          private function zoomAll():void             {                 if(myfeatureset.features){                     if (myfeatureset.features.length == 1                         && myfeatureset.features[0].geometry.type == Geometry.MAPPOINT){                         var mp:MapPoint = myfeatureset.features[0].geometry as MapPoint;                         map.zoom(1 / 16, mp);                         map.centerAt(mp);                     }else{                         var graphicsExtent:Extent = GraphicUtil.getGraphicsExtent(myfeatureset.features);                         if(graphicsExtent){                             map.zoomTo(graphicsExtent.expand(1.2));                         }else{                             var mp2:MapPoint = myfeatureset.features[0].geometry as MapPoint;                             map.zoom(1 / 16, mp2);                             map.centerAt(mp2);                         }                     }                 }             }         ]]>     </fx:Script>          <fx:Declarations>         <esri:SimpleFillSymbol id="buffpointSimpleFill"                                alpha="0.5"                                color="0xFF0000">             <esri:SimpleLineSymbol width="1"                                    alpha="0.5"                                    color="0x000000"/>         </esri:SimpleFillSymbol>                  <esri:Geoprocessor id="gp"                               url="http://localhost:6080/arcgis/rest/services/Geotraitement/BufferPoint/GPServer/BufferPoint" useAMF="false"/>     </fx:Declarations>          <viewer:WidgetTemplate id="MyTestWidget"                            width="400" height="200">         <viewer:layout>             <s:VerticalLayout horizontalAlign="center" verticalAlign="top"/>         </viewer:layout>         <s:HGroup id="boxMessage"                   width="100%"                   includeInLayout="{msgVisible}"                   visible="{msgVisible}">             <mx:Image id="swfMessage"                       source="assets/images/loader.swf"                       visible="false"/>             <s:Label id="txtMessage"                      width="90%"                      text=""/>             <s:Label buttonMode="true" textAlign="right"                      click="clearBuffer()"                      fontWeight="bold"                      includeInLayout="{bufferLyrLen &gt; 0}"                      text="Clear Buffers"                      textDecoration="underline"                      visible="{bufferLyrLen &gt; 0}"/>         </s:HGroup>         <s:HGroup width="100%" verticalAlign="middle" horizontalAlign="left" paddingTop="5">             <s:Label text="Enter the Buffer distance" />             <s:TextInput x="86" y="76" id="bufferdistance" text="1000"/>         </s:HGroup>         <s:HGroup horizontalAlign="right" width="100%" height="100%" verticalAlign="bottom">             <s:Button x="114" y="149" id="bufferBtn" label="Buffer Features..." click="buffer()" enabled="false"/>         </s:HGroup>     </viewer:WidgetTemplate> </viewer:BaseWidget>

RobertScheitlin__GISP

Fati,

I am not sure why you are trying to use a GPService for buffering when the Flex API has buffering capabilities... But, you have issues in your code.

You are passing an empty FeatureSet!

var myfeatureset:FeatureSet=new FeatureSet();

ExecuteResult object does not have a ParameterValue at a property. You have to use the Results array first that gets you an array of ParameterValues.
```
var fs:FeatureSet = gpResultat.results[0].value[0] as FeatureSet;
```
(this is me just guessing what your GPService is actually returning.

Next as this is a widget you are working on you need to post your questions to the Flex Viewer forum and not here in the Flex API forum.

fatizanady

any help please it is urgent

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