topic Re: Fields of Feature Layer in ArcGIS API for Flex Questions

Fields of Feature Layer

PaulSchneider — Fri, 29 Oct 2010 14:56:49 GMT

I an trying to add the fields of a feature layer to a combo box and am running into what seems like a silly simple problem. I have created the FeatureLayer object but when I try to access the fields I get nothing. Below is my code:

var fLayer:FeatureLayer = new FeatureLayer("http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/SanFrancisco/311Incidents/MapServer/1");

if (fLayer)
{
[INDENT]var fldArr:Array = fLayer.layerDetails.fields;
Alert.show(fldArr.toString()); //....NOTHING!!....

/* if working... do this...
var fldAL:ArrayList = new ArrayList(fldArr);
cboField.dataProvider = fldAL;
*/[/INDENT]
}

Any thoughts?

Re: Fields of Feature Layer

JustinGreco — Fri, 29 Oct 2010 15:28:02 GMT

It looks like you are trying to get the fields from a table, not a feature layer. The layer with an index of 1 is a table, try using the layer with an index of 0 instead.

If you do want to get the fields from the table with index 1, then you need to use fLayer.tableDetails.fields instead of fLayer.layerDetails.fields.

Re: Fields of Feature Layer

PaulSchneider — Fri, 29 Oct 2010 15:32:36 GMT

It looks like you are trying to get the fields from a table, not a feature layer. The layer with an index of 1 is a table, try using the layer with an index of 0 instead.

Still nothing...

Re: Fields of Feature Layer

JustinGreco — Fri, 29 Oct 2010 15:43:57 GMT

You need to wait for the feature layer to load before you can access the fields. So you need to add a LayerEvent.LOAD listener to fLayer.
Also if you want to get the field names, you need to loop through each field and push the name value to the array.

Re: Fields of Feature Layer

PaulSchneider — Tue, 02 Nov 2010 11:51:16 GMT

You need to wait for the feature layer to load before you can access the fields. So you need to add a LayerEvent.LOAD listener to fLayer.

That did it... thanks!!

Re: Fields of Feature Layer

lifeEsri — Mon, 01 Apr 2013 11:22:14 GMT

That did it... thanks!!

hello 🙂

I have the same pb when i try this Alert.show(fldArr.toString()); it's not working
'featurelayer0' .

thank you for the help

Re: Fields of Feature Layer

RobertScheitlin__GISP — Sun, 12 Dec 2021 00:09:31 GMT

life Esri,

You need to use

import mx.utils.ObjectUtil;
Alert.show(ObjectUtil.toString(fldArr));

Re: Fields of Feature Layer

lifeEsri — Sun, 12 Dec 2021 00:09:33 GMT

life Esri,

You need to use

import mx.utils.ObjectUtil;
Alert.show(ObjectUtil.toString(fldArr));

thank you but still nothing ..

ok my pb is
I would like to create a combobox that listed the layers of my service in arcgis server and publish and create another combobox which contains the list of fields in each layer selected in the first combobox
and thank you in advance.