How to list all polygons in the feature layer?

Valgenmap

arcgis‌

I have added FeatureLayer as below into the map,

var map = new Map("map", {
basemap: "streets-navigation-vector",
showLabels:false,
showAttribution: false,
slider: false,
center: [-122.45, 37.75],
zoom: 10,
minZoom: 2,
});

var selectedBoundaryServiceUrl = "https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/3";

var stateLayer = new esri.layers.FeatureLayer(selectedBoundaryServiceUrl, {
id: "Selected_Layer",
opacity: 0.7,
mode: esri.layers.FeatureLayer.MODE_AUTO,
outFields: ["*"],
infoTemplate: infoTemplate
});

g_esri.map.addLayer(stateLayer);

I tried below line of code to get array of graphics in the layer.

var listOfGraphics = map.getLayer("Selected_Layer").graphics

But the output I'm getting as "Zero"

Here I'm adding the console output for reference.

LayerOutput.JPG

11-7-2013 3-55-04 PM.jpg

DeonLengton_1-1759915988358.png

kenbuja

You have to wait until the map is loaded before attempting to access its graphics. If you use "map.addLayer", then you'll have to use syntax to check when the specific layer is loaded (since the event fires each time a layer is loaded, including basemap layers)

    map<SPAN class="punctuation token">.</SPAN><SPAN class="token function">addLayer</SPAN><SPAN class="punctuation token">(</SPAN>featureLayer<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    map<SPAN class="punctuation token">.</SPAN><SPAN class="token function">on</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">'layer-add-result'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>addLayer<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
      <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>addLayer<SPAN class="punctuation token">.</SPAN>layer <SPAN class="operator token">===</SPAN> featureLayer<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
        console<SPAN class="punctuation token">.</SPAN><SPAN class="token function">log</SPAN><SPAN class="punctuation token">(</SPAN>featureLayer<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
      <SPAN class="punctuation token">}</SPAN>
    <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Or you could use "map.addLayers", which fires when all layers are loaded.

    map<SPAN class="punctuation token">.</SPAN><SPAN class="token function">addLayers</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN>featureLayer<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    map<SPAN class="punctuation token">.</SPAN><SPAN class="token function">on</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">'layers-add-result'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
      console<SPAN class="punctuation token">.</SPAN><SPAN class="token function">log</SPAN><SPAN class="punctuation token">(</SPAN>featureLayer<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>