System.NullReferenceException: Object reference not set to an instance of an object. at ESRI.ArcGIS.Azure.Publish_Web.Controllers.

Eidul_AmeenSahul_Hamid — Tue, 22 Sep 2020 04:52:57 GMT

I am going through the following tutorial to add shape file to my map.

Add shapefile | ArcGIS API for JavaScript 3.33

My code is as follows:

arcgisMapShape: function () {

var map;

var layers = [];

require([

"esri/config",

"esri/InfoTemplate",

"esri/map",

"esri/request",

"esri/geometry/scaleUtils",

"esri/layers/FeatureLayer",

"esri/renderers/SimpleRenderer",

"esri/symbols/PictureMarkerSymbol",

"esri/symbols/SimpleFillSymbol",

"esri/symbols/SimpleLineSymbol",

"dojo/dom",

"dojo/json",

"dojo/on",

"dojo/parser",

"dojo/sniff",

"dojo/_base/array",

"esri/Color",

"dojo/_base/lang",

"dijit/layout/BorderContainer",

"dijit/layout/ContentPane",

"dojo/domReady!"

function (

esriConfig, InfoTemplate, Map, request, scaleUtils, FeatureLayer,

SimpleRenderer, PictureMarkerSymbol, SimpleFillSymbol, SimpleLineSymbol,

dom, JSON, on, parser, sniff, arrayUtils, Color, lang

) {

loadingState = "Loading";

parser.parse();

var portalUrl = "https://www.arcgis.com";

esriConfig.defaults.io.proxyUrl = "/proxy/";

// $('table').on('click', '.btn-remove-aktiviti', function (e) {

// $("#btn-remove-aktiviti").click(function(e) {

// on(dom.byId("btn-remove-aktiviti"), "click", function (e) {

// $(this).parents('tr').remove()

// resetAktiviti();

// });

// $('wizard_with_validation').on('change', '#inFile', function (event) {

on(dom.byId("inFile"), "change", function (event) {

var fileName = event.target.value.toLowerCase();

if (sniff("ie")) { //filename is full path in IE so extract the file name

var arr = fileName.split("\\");

fileName = arr[arr.length - 1];

}

if (fileName.indexOf(".zip") !== -1) {//is file a zip - if not notify user

generateFeatureCollection(fileName);

}

else {

dom.byId('upload-status').innerHTML = '<p style="color:red">Add shapefile as .zip file</p>';

}

});

// var mapid="d5e02a0c1f2b4ec399823fdd3c2fdebd"

// map = esri.arcgis.utils.createMap(mapid, "mapCanvas", {

// mapOptions: {

// basemap: "hybrid",

// center: [103.791096, 1.547069],

// slider: true,

// nav:false

// }

// });

map = new Map("mapCanvas", {

basemap: "topo",

center: [101.9758 , 4.2105],

zoom: 6,

slider: true,

logo: true,

showAttribution: false

});

function generateFeatureCollection (fileName) {

var name = fileName.split(".");

//Chrome and IE add c:\fakepath to the value - we need to remove it

//See this link for more info: http://davidwalsh.name/fakepath

name = name[0].replace("c:\\fakepath\\", "");

dom.byId('upload-status').innerHTML = '<b>Loading </b>' + name;

//Define the input params for generate see the rest doc for details

//http://www.arcgis.com/apidocs/rest/index.html?generate.html

var params = {

'name': name,

'targetSR': map.spatialReference,

'maxRecordCount': 1000,

'enforceInputFileSizeLimit': true,

'enforceOutputJsonSizeLimit': true

};

//generalize features for display Here we generalize at 1:40,000 which is approx 10 meters

//This should work well when using web mercator.

var extent = scaleUtils.getExtentForScale(map, 40000);

var resolution = extent.getWidth() / map.width;

params.generalize = true;

params.maxAllowableOffset = resolution;

params.reducePrecision = true;

params.numberOfDigitsAfterDecimal = 0;

var myContent = {

'filetype': 'shapefile',

'publishParameters': JSON.stringify(params),

'f': 'json',

'callback.html': 'textarea'

};

//use the rest generate operation to generate a feature collection from the zipped shapefile

request({

url: portalUrl + '/sharing/rest/content/features/generate',

content: myContent,

form: dom.byId('wizard_with_validation'),

handleAs: 'json',

load: lang.hitch(this, function (response) {

if (response.error) {

errorHandler(response.error);

return;

}

var layerName = response.featureCollection.layers[0].layerDefinition.name;

dom.byId('upload-status').innerHTML = '<b>Loaded: </b>' + layerName;

addShapefileToMap(response.featureCollection);

}),

error: lang.hitch(this, errorHandler)

});

}

function errorHandler (error) {

dom.byId('upload-status').innerHTML =

"<p style='color:red'>" + error.message + "</p>";

}

function addShapefileToMap (featureCollection) {

//add the shapefile to the map and zoom to the feature collection extent

//If you want to persist the feature collection when you reload browser you could store the collection in

//local storage by serializing the layer using featureLayer.toJson() see the 'Feature Collection in Local Storage' sample

//for an example of how to work with local storage.

var fullExtent;

// var layers = [];

// console.log(layers);

if (layers.length != 0) {

map.removeLayer(layers[0]);

layers = [];

}

arrayUtils.forEach(featureCollection.layers, function (layer) {

var infoTemplate = new InfoTemplate("Details", "${*}");

var featureLayer = new FeatureLayer(layer, {

infoTemplate: infoTemplate

});

//associate the feature with the popup on click to enable highlight and zoom to

featureLayer.on('click', function (event) {

map.infoWindow.setFeatures([event.graphic]);

console.log([event.graphic]);

var attributes = event.graphic.attributes;

// var nama_proje = event.graphic.attributes.NAMA_PROJE;

var latitude = event.graphic.attributes.LATITUDE;

var longitude = event.graphic.attributes.LONGITUDE;

var negeri = event.graphic.attributes.NEGERI;

var daerah = event.graphic.attributes.DAERAH;

// var bandar = event.graphic.attributes.BANDAR;

var mukim = event.graphic.attributes.MUKIM;

// var parlimen = event.graphic.attributes.PARLIMENT;

// var dun = event.graphic.attributes.DUN;

console.log(longitude);

console.log(latitude);

console.log(negeri);

// dom.byId('nama_projek').value = nama_proje;

dom.byId('latitud').value = latitude;

dom.byId('longitud').value = longitude;

dom.byId('negeri').value = negeri;

dom.byId('daerah').value = daerah;

// dom.byId('bandar').value = bandar;

dom.byId('mukim').value = mukim;

// dom.byId('parlimen').value = parlimen;

// dom.byId('dun').value = dun;

});

//change default symbol if desired. Comment this out and the layer will draw with the default symbology

changeRenderer(featureLayer);

fullExtent = fullExtent ?

fullExtent.union(featureLayer.fullExtent) : featureLayer.fullExtent;

layers.push(featureLayer);

});

map.addLayers(layers);

map.setExtent(fullExtent.expand(1.25), true);

dom.byId('upload-status').innerHTML = "";

}

function changeRenderer (layer) {

//change the default symbol for the feature collection for polygons and points

var symbol = null;

switch (layer.geometryType) {

case 'esriGeometryPoint':

symbol = new PictureMarkerSymbol({

'angle': 0,

'xoffset': 0,

'yoffset': 0,

'type': 'esriPMS',

'url': 'https://static.arcgis.com/images/Symbols/Shapes/BluePin1LargeB.png',

'contentType': 'image/png',

'width': 20,

'height': 20

});

break;

case 'esriGeometryPolygon':

symbol = new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,

new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID,

new Color([112, 112, 112]), 1), new Color([136, 136, 136, 0.25]));

break;

}

if (symbol) {

layer.setRenderer(new SimpleRenderer(symbol));

}

});

But when I add the code and run the program, i am getting the following error.

System.NullReferenceException: Object reference not set to an instance of an object. at ESRI.ArcGIS.Azure.Publish_Web.Controllers.GenerateFeaturesController.GetGenerateFeaturesOperationModelFromRequest() in C:\agents\warlockbld-win0\3\src\MTPublisher\Publish_Web\Controllers\GenerateFeaturesController.cs:line 388 at ESRI.ArcGIS.Azure.Publish_Web.Controllers.GenerateFeaturesController.Index(String id, FormCollection collection) in C:\agents\warlockbld-win0\3\src\MTPublisher\Publish_Web\Controllers\GenerateFeaturesController.cs:line 59 at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass42.b__41() at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<>c__DisplayClass39.b__33() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.b__49() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.b__49() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.b__49() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.b__49() at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<>c__DisplayClass2a.b__20() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.b__22(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) at System.Web.Mvc.Controller.<>c__DisplayClass1d.b__18(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass4.b__3(IAsyncResult ar) at System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass4.b__3(IAsyncResult ar) at System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) at System.Web.Mvc.MvcHandler.<>c__DisplayClass8.b__3(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass4.b__3(IAsyncResult ar) at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.<>c__DisplayClass285_0.b__0() at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Re: System.NullReferenceException: Object reference not set to an instance of an object. at ESRI.ArcGIS.Azure.Publish_Web.Controllers.

Eidul_AmeenSahul_Hamid — Wed, 23 Sep 2020 02:05:02 GMT

Solve the problem..

just need to change the following code

topic System.NullReferenceException: Object reference not set to an instance of an object. at ESRI.ArcGIS.Azure.Publish_Web.Controllers. in HTML5, CSS, JavaScript, and JavaScript Frameworks

System.NullReferenceException: Object reference not set to an instance of an object. at ESRI.ArcGIS.Azure.Publish_Web.Controllers.

Re: System.NullReferenceException: Object reference not set to an instance of an object. at ESRI.ArcGIS.Azure.Publish_Web.Controllers.