topic Re: Access Fields Name for particular Layer with LayerID in ArcGIS Runtime SDK for iOS Questions

Access Fields Name for particular Layer with LayerID

GajaNaik — Fri, 14 Aug 2015 18:50:32 GMT

Hello,

its urgent ...

i actually tried ways , even checked ESRI sample code QueryTaskExample. i need simply to get Fields Names or Attributes of any Layer .

i used following method...

self.queryTask = [AGSQueryTask queryTaskWithURL:[NSURLURLWithString:strMAPURL]]; // here i send like @"http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/3"

self.queryTask.delegate = self;

//return all fields in query

self.query = [AGSQuery query];

self.query.outFields = [NSArray arrayWithObjects:@"*", nil];

self.query.text = @"Fields"; // with out this line or without empty query it gives error

[self.queryTask executeWithQuery:self.query];

i access below delegates :

//results are returned

- (void)queryTask:(AGSQueryTask *)queryTask operation:(NSOperation *)op didExecuteWithFeatureSetResult:(AGSFeatureSet *)featureSet {

//get feature, and load in to table

self.featureSet = featureSet;

[super.tableView reloadData];

}

featureSet.fields // this should be giving me Name of Fields for Layer 3....

but i am getting Array as 0 elements...... i need to get Fields name in same order as there in Server Layer....

Re: Access Fields Name for particular Layer with LayerID

NimeshJarecha — Fri, 14 Aug 2015 19:36:33 GMT

The fields in AGSFeatureSet is available only if the ArcGIS Server service is version 10.1 and above. Please refer help here. Are you using sample server service or your own service? If your own service then run query on the browser and make sure it returns `fields`. Please let me know so I can help you further.

Regards,

Nimesh

Re: Access Fields Name for particular Layer with LayerID

GajaNaik — Fri, 14 Aug 2015 20:44:54 GMT

i tried with Server 10.3 , http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/2

but Fields only show 53 objects but each object shows 0 Key/value pair

Re: Access Fields Name for particular Layer with LayerID

NimeshJarecha — Fri, 14 Aug 2015 20:50:24 GMT

fields is an array of AGSField objects. You will get name of the field from property. Actual, values are in the AGSGraphic's attributes.

Regards,

Nimesh