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How to get fields of Dynamic Layer hosted by ArcGIS Server?

ForrestLin

How to get fields of Dynamic Layer hosted by ArcGIS Server using JavaScript?

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Accepted answers

JoelBennett

You can create a FeatureLayer object from the REST endpoint URL, and get the information from its fields collection after it loads:

const featureLayer = new FeatureLayer({
	url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Landscape_Trees/FeatureServer/0"
});

featureLayer.when(function() {
	featureLayer.fields.forEach(function(field) {
		console.info(field.name + " ( type: " + field.type + ", alias: " + field.alias + " )");
	});
});

featureLayer.load();

All comments

JoelBennett

You can create a FeatureLayer object from the REST endpoint URL, and get the information from its fields collection after it loads:

const featureLayer = new FeatureLayer({
	url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Landscape_Trees/FeatureServer/0"
});

featureLayer.when(function() {
	featureLayer.fields.forEach(function(field) {
		console.info(field.name + " ( type: " + field.type + ", alias: " + field.alias + " )");
	});
});

featureLayer.load();

ForrestLin

@JoelBennett

Thanks.

ForrestLin

public loadFields(url: string): Promise<Field[]> {

const featureLayer = new FeatureLayer({ url });

return featureLayer.load().then((layer: FeatureLayer) => {

return layer.fields;

});

}

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