topic Detect if layer contains any data? in ArcGIS JavaScript Maps SDK Questions https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/detect-if-layer-contains-any-data/m-p/479105#M44525 <HTML><HEAD></HEAD><BODY><SPAN>Can anyone say how can I detect if layer contains any data?</SPAN><BR /><BR /><SPAN>There is a list of layer checkboxes next to the map that user can activate/deactivate. The layers are retrieved from third-party map server.</SPAN><BR /><SPAN>Layers are about distribution. I only want to show layers that contain any data about distribution (not all objects are present on all layers).</SPAN><BR /><SPAN>Does anyone know how I can do that?</SPAN><BR /><BR /><SPAN>Regards,</SPAN><BR /><SPAN>Risto</SPAN></BODY></HTML> Wed, 08 Feb 2012 13:39:43 GMT RistoAlt 2012-02-08T13:39:43Z Detect if layer contains any data? https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/detect-if-layer-contains-any-data/m-p/479105#M44525 <HTML><HEAD></HEAD><BODY><SPAN>Can anyone say how can I detect if layer contains any data?</SPAN><BR /><BR /><SPAN>There is a list of layer checkboxes next to the map that user can activate/deactivate. The layers are retrieved from third-party map server.</SPAN><BR /><SPAN>Layers are about distribution. I only want to show layers that contain any data about distribution (not all objects are present on all layers).</SPAN><BR /><SPAN>Does anyone know how I can do that?</SPAN><BR /><BR /><SPAN>Regards,</SPAN><BR /><SPAN>Risto</SPAN></BODY></HTML> Wed, 08 Feb 2012 13:39:43 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/detect-if-layer-contains-any-data/m-p/479105#M44525 RistoAlt 2012-02-08T13:39:43Z Re: Detect if layer contains any data? https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/detect-if-layer-contains-any-data/m-p/479106#M44526 <HTML><HEAD></HEAD><BODY><SPAN>Use a </SPAN><A href="http://help.arcgis.com/en/webapi/javascript/arcgis/help/jsapi/querytask.htm">queryTask's</A><SPAN> </SPAN><A href="http://help.arcgis.com/en/webapi/javascript/arcgis/help/jsapi/querytask.htm#executeForIds">executeForIds</A><SPAN> method. If the query comes back with anything, your layer has data.</SPAN></BODY></HTML> Wed, 08 Feb 2012 16:04:37 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/detect-if-layer-contains-any-data/m-p/479106#M44526 derekswingley1 2012-02-08T16:04:37Z