FindTask查询
Findtask：用于属性查询，可以查询多个图层，不能进行空间查询思路：
创建需要的对象FindTask、FindParameters、渲染符号SimpleLineSymbol等。设置查询参数FindParameters执行查询渲染查询结果 示例代码：注意findtask可以实现精确查找(完全匹配),:contains参数决定是否查找搜索文本的完全匹配。如果为true，则搜索包含提供的searchText的值。这是不区分大小写的搜索。如果为false，则搜索searchText字符串的完全匹配项。精确匹配是区分大小写的。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>查询功能
</title>
<style>
#mapDiv {
width: 100%;
height: 600px;
border: 1px solid #000;
}
</style>
<link rel="stylesheet" type="text/css" href="http://localhost/arcgis_js_api/library/3.17/3.17/dijit/themes/tundra/tundra.css"/>
<link rel="stylesheet" type="text/css" href="http://localhost/arcgis_js_api/library/3.17/3.17/esri/css/esri.css" />
<script type="text/Javascript" src="http://localhost/arcgis_js_api/library/3.17/3.17/init.js"></script>
<script>
require(["esri/map",
"esri/layers/ArcGISDynamicMapServiceLayer",
"dojo/on",
"dojo/dom",
"esri/tasks/FindTask",
"esri/tasks/FindParameters",
"esri/symbols/SimpleLineSymbol",
"esri/symbols/SimpleFillSymbol",
"esri/graphic",
"dojo/domReady!],
function (Map, ArcGISDynamicMapServiceLayer,on,dom,
FindTask, FindParameters,
SimpleLineSymbol,SimpleFillSymbol,Graphic){
var map = new Map('mapDiv');
var MapServer = "http://localhost:6080/arcgis/rest/services/TestServer/MyMapService/MapServer";
var layer = new ArcGISDynamicMapServiceLayer(MapServer);
map.addLayer(layer);
var findTask = new FindTask(MapServer);
var findParams = new FindParameters();
on(dom.byId('btn'), 'click', function () {
findParams.returnGeometry =true;
findParams.layerIds = [3];
findParams.searchFields = ['name'];
findParams.searchText = 'J4';
findTask.execute(findParams, ShowFindResult);
});
function ShowFindResult(queryResult) {
var lineSymbol = new SimpleLineSymbol("solid", new dojo.Color([255, 0, 0]), 2);
var fill = new SimpleFillSymbol("solid", lineSymbol, new dojo.Color("#87CEEB"));
console.log(queryResult);
if (queryResult.length === 0) {
dom.byId('divShowResult').innerHTML = "";
return;
}
var htmls = "";
if (queryResult.length >= 1) {
htmls = htmls + "<table style='width: 100%;'>";
htmls = htmls + "<tr><td>名称</td></tr>";
console.log(htmls);
for (var i = 0; i < queryResult.length; i++) {
var graphic = queryResult[i].feature;
console.log(graphic.geometry.type === "polygon");
graphic.setSymbol(fill);
map.graphics.add(graphic);
var ptName = graphic.attributes["alias"];
if (i % 2 === 0) {
htmls = htmls + "<tr>";
}else {
htmls = htmls + "<tr bgcolor='#F0F0F0'>";
}
htmls = htmls + "<td><a href='#'>" + ptName + "</a></td>";
htmls = htmls + "</tr>";
}
htmls = htmls + "</table>";
dom.byId('divShowResult').innerHTML = htmls;
}
}
});
</script>
</head>
<body>
<div id="mapDiv"></div>
<input type="button" value="属性查询" id="btn">
<div id="divShowResult"></div>
</body>
</html>
