标签：style blog http color java os io 数据
放纵了几天，又有了学习的动力。今天实现了利用对 FeatureLayer 进行属性查询在地图上进行跳转。
一、我下载了一幅浙江省的县界面地图，存在NAME字段，利用Name就能进行查询了：
var name = tb.value; if(name!="") { var query = new esri.tasks.Query(); query.where = "NAME = ‘"+name+"‘"; fl.queryFeatures(query, function (featureset) { var a =featureset.features[0].geometry.getExtent(); map.setExtent(a); }); }
备注：FeatureLayer.queryFeatures 返回的不是 Feature 的一个集合，需要注意的是它本身就是单独的一个 Object ，而不是单纯的 Arry[] ，一开始没仔细看，半天取不出数据。不知道能不能进行模糊查询，希望可以，不然真的不方便啊。再试试...
二、很简单的例子给大家看看：
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Query Demo</title> <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/dojo/dijit/themes/tundra/tundra.css"> <link rel="stylesheet" href="http://js.arcgis.com/3.10/js/esri/css/esri.css"> <script type="text/javascript" charset="utf-8" src="http://js.arcgis.com/3.10/"></script> <script type="text/javascript" charset="utf-8" src="js/dojo.js"></script> <script type="text/javascript" charset="utf-8"> require([ "esri/map", "esri/layers/FeatureLayer", "esri/tasks/query", "esri/TimeExtent","esri/tasks/query", "dojo/number", "dojo/date/locale", "dojo/dom","dojo/on", "dojo/_base/array", "dojo/store/Memory", "dgrid/OnDemandGrid", "dojo/domReady!" ], function() { //初始化地图控件 var map = new esri.Map("mapdiv"); map.setBasemap("osm"); var bounds = new esri.geometry.Extent({ "xmin":118.363523,"ymin":29.219302,"xmax":119.508848,"ymax":30.073848, "spatialReference":{"wkid":4326}}); map.setExtent(bounds); //初始化图层 var durl = "http...MapServer"; var dl = new esri.layers.ArcGISDynamicMapServiceLayer(durl); var furl = "http...MapServer/0"; var fl = new esri.layers.FeatureLayer(furl,{outFields: ["*"],opacity: 0}); map.addLayer(dl); map.addLayer(fl); //注册Go点击事件 var btn = document.getElementById("query"); btn.onclick = function(){ var tb = document.getElementById("val"); var name = tb.value; if(name!="") { var query = new esri.tasks.Query(); query.where = "NAME = ‘"+name+"‘"; fl.queryFeatures(query, function (featureset) { var a =featureset.features[0].geometry.getExtent(); map.setExtent(a); }); } } }); </script> </head> <body> <div id="tolbox"> Name: <input type="text" name="val" id="val" /> <input type="button" name="query" id="query" value="Go" /> </div> <div id="mapdiv" style="width: 600px; height: 600px; background-color: #FF8F8F;"></div> </body> </html>
效果：
利用 Task\Query 实现定位 , FeatureLayer 的属性查询,布布扣,bubuko.com
利用 Task\Query 实现定位 , FeatureLayer 的属性查询
标签：style blog http color java os io 数据
原文地址：http://www.cnblogs.com/qdhotel/p/3892480.html
