Identify task-error in map point doesnt select exact features where it is clicked.

Question

Hello everyone,

After clicking on map ,my identify task doesnt returns result from layers where the exact map point is. Sometimes it works for all feature layers in one service.But mostly it doesnt work as expected. It returns result from  some of the feature layers and not from all feature layer whose features are present at click point.

GauriDeshmukh · Answer

Ken Buja‌ ,Riyas Deen  ,

Here I found the cause of my problem-

After clicking identify button I  had changed my cursor(custom cursor), thus clicking on map with changed cursor resulted in shifting my original map point. Also if I change my cursor to any of the standard cursor value provided in api, it takes the exact map point.

But now the problem is I cant use custom cursor. Any solution for this?

GauriDeshmukh · Answer

Riyas Deen  yes ..was looking for the similar kind of code,using differed list.

RiyasDeen · Answer

Looks like you want to execute identify on multiple map services. What you need here is dojo.deferredList

Below extracts from one of my old project where i have used deferred list for wiring multiple selection operation. You should be able to build up on this.

// 1. Populate your deferred array
var deferredQuery = this._queryTask.execute(args.spatialQuery);
this._deferredQueryArray[this._deferredQueryArray.length] = deferredQuery;

// 2. Hook up your deferred list then action
if (this._deferredQueryArray.length > 0) {
  this._deferredQueryList = new dojo.DeferredList(this._deferredQueryArray); 
  this._deferredQueryList.then(
  dojo.hitch(this, this.handleDeferredResults, extent, businessData, queryLayerMap),
  dojo.hitch(this, function (err) {
  alert(err);
  }));
}

// 3. Handle your deferred
handleDeferredResults: function (extent, businessData, queryLayerFieldMaps, results) {
  console.log("Entered Method: " + arguments.callee.nom);
  if (results.length != queryLayerFieldMaps.length) {
  alert("Somethings not right, contact application support. Business data and spatial results don't match");
  }
  this.removeFiredFromDeferred(this._deferredQueryArray);

// Do whatever you would normally do with your identify result.
}

// 4. Clear Your fired deferred from your deferred list
removeFiredFromDeferred: function (deferredArray) {
  for (var idx = deferredArray.length -1; idx >= 0; idx--) {
  if (deferredArray[idx].fired > -1) {
  deferredArray.splice(idx, 1);
  }
  }
}