Zoom to extent of graphic array in Feature Layer not working

Question

I can't work out why my map is not zooming to the extent of graphics in my featurelayer. See at the bottom of this code where I try and use the esri.graphicextent method. function initOperationalLayer(map) { var content = "Street: ${Street_Name}, ${Suburb}
" + "Pickup Time: ${Departure_Time}"; var infoTemplate = new esri.InfoTemplate("Route 1 Details", content); var featureLayer = new esri.layers.FeatureLayer("http://gsportenf/ArcGIS/rest/services/Public_Access/MapServer/12",{ mode: esri.layers.FeatureLayer.MODE_ONDEMAND, outFields: ["*"], infoTemplate: infoTemplate }); map.addLayer(featureLayer); var symbol = new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255,255,255,0.35]), 1); var renderer = new esri.renderer.SimpleRenderer(symbol); featureLayer.setRenderer(renderer); map.infoWindow.resize(300,100); var zoomExtent= esri.graphicsExtent(featureLayer.graphics); map.setExtent(zoomExtent); // THE MAP IS NOT CHANGING !!! }

HunterWei · Answer

But this event keeps firing... If you add an alert in this event handler, you will know what I mean. How to fix this problem?

Thanks

I met the same issue, but finally I figured it out with a turnaournd approach by using a featurelayer query, see below code
featureLayer.setDefinitionExpression("COUNTY='" + value + "'");

var query = new esri.tasks.Query();
query.where = "1=1";
query.outSpatialReference = map.spatialReference;
featureLayer.queryFeatures(query, function (featureSet) {
    var data = [];
    if (featureSet && featureSet.features && featureSet.features.length > 0) {
        data = featureSet.features;
    }
    var zoomExtent = esri.graphicsExtent(data);
    map.setExtent(zoomExtent);
});

RoseZhou · Answer

I found out with an alert that my featurelayer.graphics.length was = 0 so I could not even access the graphics at all.
I found a post titled "unable to draw graphic" which helped me solve this problem.

If the layer isn't finished drawing before I try and zoom to the graphic extent, it simply won't zoom.

What I did was move the zoom code to an event handler using the onUpdateEnd event of the feature layer.

// Just after defining the featurelayer >

dojo.connect(featureLayer, "onUpdateEnd", function() {
 var zoomExtent = esri.graphicsExtent(featureLayer.graphics);
 map.setExtent(zoomExtent);
});     //  now the zoom won't happen until map is updated
map.addLayer(featureLayer);