topic Re: QueryTask for dynamicLayer in ArcGIS JavaScript Maps SDK Questions

QueryTask for dynamicLayer

tomwang1 — Wed, 09 Apr 2014 19:28:13 GMT

Hi,

I am using ArcGISDynamicMapServiceLayer not FeatureLayer. I am wondering if there a way to query a dynamic layer while user clicks on map? Something likes:

var queryTask = new QueryTask(dynamicMapServiceUrl + "/dynamicLayer", {
"source": layerSource
});
var query = new Query();
query.geometry = clickedMapPoint

Re: QueryTask for dynamicLayer

JianHuang — Wed, 09 Apr 2014 19:55:12 GMT

Yes, the code snippet that you have should work.

Re: QueryTask for dynamicLayer

tomwang1 — Sat, 11 Dec 2021 12:34:22 GMT

Hi Huang Jian,

Nice to talk you again. I am not sure what I have be missing. I got this error message:

Uncaught TypeError: Object [object Object] has no method 'toJson'

If I change "dynamicMapServiceUrl/dynamicLayer" to "dynamicMapServiceUrl/2" to test my code, it works fine. Also the layerSource has no problem to draw on my map. Please advise!

function createQueryDataSourceLayer(mQuery) {
                  var m_queryDataSource = new esri.layers.QueryDataSource();
                  m_queryDataSource.geometryType = "polygon";
                  m_queryDataSource.oidFields = ["OBJECTID"];
                  m_queryDataSource.query = mQuery;
                  m_queryDataSource.spatialReference = new esri.SpatialReference({ wkid: 102100 });
                  m_queryDataSource.workspaceId = "myworkspace";
                  layerSource = new LayerDataSource();
                  layerSource.dataSource = m_queryDataSource;

                  return layerSource;
              }

Re: QueryTask for dynamicLayer

JianHuang — Wed, 09 Apr 2014 20:59:22 GMT

What is the layerSource got returned? Please post the json object.

Re: QueryTask for dynamicLayer

tomwang1 — Wed, 09 Apr 2014 21:20:39 GMT

I am not sure how to post json of the layerSource? it is an object. I can see from Chrome console, there are too many object in side.

Re: QueryTask for dynamicLayer

JianHuang — Wed, 09 Apr 2014 21:49:46 GMT

Or, maybe you can create a simple reproducible case and put it on jsfiddle.net.

Re: QueryTask for dynamicLayer

tomwang1 — Thu, 10 Apr 2014 14:19:28 GMT

Thanks Huang Jian,

It was my mistake. QueryTask for dynamicLayer works fine with no problem!