topic Re: Get layer ID from FeatureSet in ArcGIS API for Flex Questions

Get layer ID from FeatureSet

LukeEvans — Wed, 04 Aug 2010 12:21:37 GMT

Hi,

I currently have a problem where I need to be able to retrieve the layer ID from the feature set I am provided with. I can't seem to see anywhere this is possible without knowing which layer the initial query was executed on. Can anyone help?

Thanks

Luke

Re: Get layer ID from FeatureSet

MLowry — Wed, 04 Aug 2010 18:08:32 GMT

Does this belong in the Flex forum for any reason?

Use this URL and replace "server" with the name of the server the services reside on and drill down to the service:

http://www.server.com/ArcGIS/rest/services

Re: Get layer ID from FeatureSet

LukeEvans — Thu, 05 Aug 2010 06:42:44 GMT

Does this belong in the Flex forum for any reason?

Use this URL and replace "server" with the name of the server the services reside on and drill down to the service:

http://www.server.com/ArcGIS/rest/services

I don't think you quite understood what I was asking. I have already executed a Query in Flex. In the query result method I have a FeatureSet returned from the server. I wondered if there was any way of knowing which layer this query was performed on, solely from the FeatureSet returned.

I'm having this issue because I am running multiple queries, with each possibly using a different layer and different geometry. As these are asynchronous calls, how am I to be certain which result belongs to which query (and therefore which layer)?

Re: Get layer ID from FeatureSet

MarnikBlomme — Thu, 05 Aug 2010 08:22:16 GMT

Add the reference to your layer when you do the query like:

queryTask.execute(query, new AsyncResponder(onResult, onFault, myLayerID));

Then define your result handler like :

function onResult(featureSet:FeatureSet, myLayerID:Number):void
{
...
}

Re: Get layer ID from FeatureSet

LukeEvans — Thu, 05 Aug 2010 08:37:10 GMT

Add the reference to your layer when you do the query like:

queryTask.execute(query, new AsyncResponder(onResult, onFault, myLayerID));

Then define your result handler like :

function onResult(featureSet:FeatureSet, myLayerID:Number):void
{
...
}

Perfect! Thanks a lot for your help.

Re: Get layer ID from FeatureSet

MLowry — Thu, 05 Aug 2010 12:21:48 GMT

I don't think you quite understood what I was asking. I have already executed a Query in Flex. In the query result method I have a FeatureSet returned from the server. I wondered if there was any way of knowing which layer this query was performed on, solely from the FeatureSet returned.

I'm having this issue because I am running multiple queries, with each possibly using a different layer and different geometry. As these are asynchronous calls, how am I to be certain which result belongs to which query (and therefore which layer)?

Sorry about that! I misunderstood the question.

Glad you got it worked out!