topic Re: Layer Definition string limitation in ArcGIS API for Silverlight Questions

Layer Definition string limitation

ESRIESRI1 — Fri, 01 Nov 2013 14:40:51 GMT

Using ESRI Sliverlight API 3.1 using layer definition in dynamic service layer, when I create a definition ID in ('1','2','3'......'1000001') . This definition is not getting applied, when I pass big string in REST unable to perform the query. But I need to set a filter based on ID, but I cannot number of ids. How to solve this?

                LayerDefinition def = new LayerDefinition();
                def.LayerID = layerId;
                def.Definition = "ID" + " in " + idString;
                dynamicServiceLayer.LayerDefinitions.Add(def);

idString = ID in ('1', '2','3'.....'1000001')

Re: Layer Definition string limitation

ESRIESRI1 — Tue, 05 Nov 2013 14:53:21 GMT

Any help on this?.

Re: Layer Definition string limitation

DominiqueBroux — Wed, 20 Nov 2013 15:05:10 GMT

What is the size of your idString?
I tested with big string such as 1Mb without any issue.
Though I guess there is a limit, but, for performances, it's not recommended to use big layerDefinition because the layerDefinition is going through the network for every zoom or pan.

Re: Layer Definition string limitation

AnjunFactor — Wed, 05 Feb 2014 17:00:02 GMT

I am performing a query (http://servername/ArcGIS/rest/services/Overlay_Map/MapServer/0/query) on a layer using the Where APN in ('1111111111', '1111111112', ...). The query successfully returns data when the number of characters in the Where field is 13008 characters or less. If I add another APN, the query gives an "Unable to perform query" error message. Is this a standard limitation in the number of characters in the application? Can this be increased?

Re: Layer Definition string limitation

LanceCrumbliss — Thu, 06 Feb 2014 00:37:50 GMT

stab in the dark, but you could roll your own webclient request and use POST, putting the query in the body instead of using the querytask (which I think uses GET). I could be mistaken but I think that is what the featurelayer layer type does when filtering existing features from the request on a refresh.

Re: Layer Definition string limitation

AnjunFactor — Thu, 06 Feb 2014 15:49:10 GMT

Thanks for the response, chuckyboy81070. FYI, I am already using POST when I run into this problem. Using GET is even more limited.