Should I do this kind of query against a feature layer, or is it simply not feasible with a large dataset?
I looked at your map services: http://dingo.gapanalysisprogram.com/ArcGIS/rest/services/PADUS/PADUS_status/MapServer/0. The field State_Nm listed as numeric string. So your statement query.where ="State_Nm='South Carolina'"; would not work. Actually i tried it on your query page: http://dingo.gapanalysisprogram.com/ArcGIS/rest/services/PADUS/PADUS_status/MapServer/0//query. Change your query.where statement to query.where ="State_Nm='46'" (i don't know SC's code value in your layer, so i just guess it), you will get results back and u can go from there to test rest of your code. I did noticed that query returned a big number of graphics, so i am not sure your approach is going to work...
Hi: I'm trying to adapt the example at http://help.arcgis.com/en/webapi/javascript/arcgis/demos/query/query_hover.htmlHowever, I am not able to make it work. I've looked at the sample code and some other examples, and I can't see where I went wrong. Any help would be appreciated. Here's my code._____________________________________________<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <meta http-equiv="X-UA-Compatible" content="IE=7" /> <title>Title</title> <link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/1.5/js/dojo/dijit/themes/tundra/tundra.css"> <script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=1.6"></script> <script type="text/javascript" language="Javascript"> dojo.require("esri.map");dojo.require("esri.tasks.query");var map;function init() { var startExtent = new esri.geometry.Extent(-83.41, 31.98, -78.47, 35.28, new esri.SpatialReference({wkid:4326}));map = new esri.Map("map",{extent:startExtent}); dojo.connect(map,"onLoad", initFunctionality); map.addLayer(new esri.layers.ArcGISDynamicMapServiceLayer("http://dingo.gapanalysisprogram.com/ArcGIS/rest/services/PADUS/PADUS_status/MapServer")); var gap = new esri.layers.ArcGISDynamicMapServiceLayer("http://dingo.gapanalysisprogram.com/ArcGIS/rest/services/PADUS/Ancillary/MapServer"); map.addLayer(gap); } function initFunctionality(map) { //build query task //var queryTask = new esri.tasks.QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/3"); var queryTask = new esri.tasks.QueryTask("http://dingo.gapanalysisprogram.com/ArcGIS/rest/services/PADUS/PADUS_status/MapServer/0");//build query filter query = new esri.tasks.Query(); query.returnGeometry = true; //query.outFields = ["NAME", "POP2000"]; query.outFields = ["P_Des_Nm","P_Loc_Nm","Own_Name","Mang_Name"]; query.where = "State_Nm='South Carolina'"; //identify proxy page to use if the toJson payload to the geometry service is greater than 2000 characters. //If this null or not available the buffer operation will not work. Otherwise it will do a http post to the proxy. //esriConfig.defaults.io.proxyUrl = "/arcgisserver/apis/javascript/proxy/proxy.ashx";esriConfig.defaults.io.proxyUrl = "http://dingo.gapanalysisprogram.com/proxy/proxy.ashx";esriConfig.defaults.io.alwaysUseProxy = false; var infoTemplate = new esri.InfoTemplate(); infoTemplate.setTitle("${P_Des_Nm}"); infoTemplate.setContent("<b>Owner: </b>${Own_Name}<br/>" + "<b>Manager</b>${Mang_Name}<br/>" + "<b>Location: </b>${P_Loc_Nm}"); map.infoWindow.resize(245,125); queryTask.execute(query); dojo.connect(queryTask, "onComplete", function(featureSet) { map.graphics.clear(); var highlightSymbol = new esri.symbol.SimpleFillSymbol(esri.symbol.SimpleFillSymbol.STYLE_SOLID, new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255,0,0]), 3), new dojo.Color([125,125,125,0.35])); //var highlightSymbol = new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255,0,0]), 3); var symbol = new esri.symbol.SimpleFillSymbol(esri.symbol.SimpleFillSymbol.STYLE_SOLID, new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new dojo.Color([255,255,255,0.35]), 1),new dojo.Color([125,125,125,0.35])); var countiesGraphicsLayer = new esri.layers.GraphicsLayer(); //QueryTask returns a featureSet. Loop through features in the featureSet and add them to the map. for (var i=0, il=featureSet.features.length; i<il; i++) { //Get the current feature from the featureSet. //Feature is a graphic var graphic = featureSet.features; graphic.setSymbol(symbol); graphic.setInfoTemplate(infoTemplate); //Add graphic to the counties graphics layer. countiesGraphicsLayer.add(graphic); } map.addLayer(countiesGraphicsLayer); map.graphics.enableMouseEvents(); //listen for when the onMouseOver event fires on the countiesGraphicsLayer //when fired, create a new graphic with the geometry from the event.graphic and add it to the maps graphics layer dojo.connect(countiesGraphicsLayer, "onMouseOver", function(evt) { map.graphics.clear(); //use the maps graphics layer as the highlight layer var content = evt.graphic.getContent(); map.infoWindow.setContent(content); var title = evt.graphic.getTitle(); map.infoWindow.setTitle(title); var highlightGraphic = new esri.Graphic(evt.graphic.geometry,highlightSymbol); map.graphics.add(highlightGraphic); map.infoWindow.show(evt.screenPoint,map.getInfoWindowAnchor(evt.screenPoint)); }); //listen for when map.graphics onMouseOut event is fired and then clear the highlight graphic //and hide the info window dojo.connect(map.graphics, "onMouseOut", function(evt) { map.graphics.clear(); map.infoWindow.hide(); }); }); queryTask.execute(query); } dojo.addOnLoad(init); </script> </head> <body class="tundra"> Hover over a protected area in South Carolina to get more information. <div id="map" style="width:900px; height:600px; border:1px solid #000;"></div> </body></html>
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