备注:由于实现本篇功能的需求,修改了地图数据的dlsearch.mxd,然后更新了地图服务,需要的在文章最后有提供最新的mxd以及源代码下载的 上一篇实现了demo的地图工具栏,本篇新增地图查询功能,包括属性查询和空间查询两大块,截图如下: 属性查询效果图: 空间查询效果图:
谈核心代码实现之前,我大概的讲一讲arcgis for js的地图查询方式,一般来说,总共有三种查询方式:FindTask、IdentifyTask、QueryTask (1)FindTask查询模式:基于关键字来模糊查询地图图层,属于文本型的,不能基于地图的设置的空间范围Geometry来查询,但是可以跨越多个图层来查询,比如餐饮图层、医疗服务图层等等; (2)IdentifyTask查询模式:跟FindTask反过来,基于地图的设置的空间范围Geometry来查询,不能基于文本查询,同样可以跨越多个图层来查询; (3)QueryTask查询模式:结合FindTask以及IdentifyTask一体,可以基于文本或者空间范围来查询,但是限定了查询图层,不能跨越多个图层来查询; 下面依据属性查询和空间查询不同思路来讲解一下核心实现模块,实现之前在map.js必须引入相关的调用api包: - (function () {
- dojo.require("esri.tasks.FindTask");
- dojo.require("esri.tasks.FindParameters");
- dojo.require("esri.tasks.IdentifyTask");
- dojo.require("esri.tasks.IdentifyParameters");
- })();
复制代码一、属性查询模块: 1是基于FindTask属性查询的,可以查询的图层覆盖:餐饮、住宿、金融服务、购物、科研教育、医疗服务; 2是基于QueryTask属性查询,分类查询; FindTask属性查询实现核心代码: - var find = new esri.tasks.FindTask(MapConfig.vecMapUrl + "/");//URL
- var params = new esri.tasks.FindParameters();
- params.layerIds = [0,1,2,3,4,5]; //设置查询图层列表
- params.searchFields = ["NAME"]; //设置查询图层的字段,根据NAME字段来模糊查询
- params.searchText = keyword;//设置模糊查询的关键词
- params.returnGeometry = true;//返回空间查询的geometry,方便把返回值结果以图标形式叠加在地图上
- find.execute(params, DCI.Poi.findInfo);
复制代码- /**
- * 所有图层的属性查询结果--FindTask
- */
- findInfo: function (results) {
- DCI.Poi.clearAndhide();
- var sms = new esri.symbol.PictureMarkerSymbol(getRootPath() + "Content/images/plot/point1.png", 11, 13);
- var innerStr = [];
- var featureCount = results.length;
- //最大的显示页面
- var maxpage = Math.ceil(featureCount / DCI.Poi.pageSize);
- if (results.length > 0) {
- $("#listpages").css({ display: "block" });
- for (var i = 0; i < DCI.Poi.pageSize; i++) {
- var rExtent = null;
- var iId = i + 1;
- var baseGraphicsymbol = new esri.symbol.PictureMarkerSymbol(getRootPath() + "Content/images/poi/dw" + iId + ".png", 25, 25);
- var infactItem = DCI.Poi.pageIndex * DCI.Poi.pageSize + i;
- var tempID = "tempID" + i;
- var pId = "poi_" + iId;
- if (results[infactItem] == undefined) //最后一页没有记录了 跳出循环
- break;
- var attr = { "title": results[infactItem].feature.attributes.NAME, "content": results[infactItem].feature.attributes.NAME };
- var baseGraphic = new esri.Graphic(results[infactItem].feature.geometry, baseGraphicsymbol, attr);
- baseGraphic.id = tempID;
- DCI.Poi.graphicslayer.add(baseGraphic);
- innerStr.push('<div class="left_list_li_box" onmouseover="DCI.Poi.onPOIMouseOverRecord(' + i + ',\'' + tempID + '\')" onmouseout="DCI.Poi.onPOIMouseOutRecord(' + i + ',\'' + tempID + '\')" id="' + pId + '">');
- innerStr.push('<div class="left_list_li_box_top">');
- innerStr.push('<div class="left2_box2">');
- innerStr.push('<img class="list_poi_marker" style="" src="' + getRootPath() + 'Content/images/poi/dw' + iId + '.png"></img>');
- innerStr.push('<div class="left_list_li1">');
- innerStr.push('<p>');
- innerStr.push('<a onclick="DCI.Poi.toLocationPOI(' + i + ',\'' + tempID + '\',\'' + results[infactItem].feature.attributes.NAME + '\')">' + results[infactItem].feature.attributes.NAME + '</a><br/>');
- innerStr.push('</p>');
- innerStr.push('</div>');
- innerStr.push('</div>')
- innerStr.push('</div>');
- innerStr.push('</div>');
- }
- $("#showLists").html(innerStr.join(''));
- //设置地图显示范围
- if (rExtent == null)
- rExtent = baseGraphic._extent;
- else {
- rExtent = rExtent.union(baseGraphic._extent);
- }
- DCI.Poi.map.setExtent(rExtent.expand(2));
- DCI.Poi.map.resize();
- DCI.Poi.map.reposition();
- //分页工具条
- $("#listpages").PageOperator({
- containerID: "listpages",
- count: featureCount,
- pageIndex: DCI.Poi.pageIndex,
- maxPage: maxpage,
- callback: function (pageIndex) {
- var keyword = $("#skeyword").val();
- DCI.Poi.pageIndex = pageIndex;
- DCI.Poi.search(keyword, pageIndex, DCI.Poi.pageSize);
- }
- });
- } else {
- alert("搜索不到相关数据");
- }
- }
复制代码QueryTask属性查询实现核心代码: - var query = new esri.tasks.Query();
- query.returnGeometry = true;
- query.outFields = ["NAME"];
- query.where = "1=1";
- queryTask = new esri.tasks.QueryTask(typeUrl);
- queryTask.execute(query, DCI.Poi.navInfo);
复制代码- /**
- * 指定图层的属性查询--Query
- */
- navInfo: function (results) {
- DCI.Poi.clearAndhide();
- var sms = new esri.symbol.PictureMarkerSymbol(getRootPath() + "Content/images/plot/point1.png", 11, 13);
- var innerStr = [];
- var featureCount = results.features.length;
- //最大的显示页面
- var maxpage = Math.ceil(featureCount / DCI.Poi.pageSize);
- if (results.features.length > 0) {
- $("#listpages").css({ display: "block" });
- for (var i = 0; i < DCI.Poi.pageSize; i++) {
- var rExtent = null;
- var iId = i + 1;
- var baseGraphicsymbol = new esri.symbol.PictureMarkerSymbol(getRootPath() + "Content/images/poi/dw" + iId + ".png", 25, 25);
- var infactItem = DCI.Poi.pageIndex * DCI.Poi.pageSize + i;
- var tempID = "tempID" + i;
- var pId = "poi_" + iId;
- if (results.features[infactItem] == undefined) //最后一页没有记录了 跳出循环
- break;
- var attr = { "title": results.features[i].attributes.NAME, "content": results.features[i].attributes.NAME };
- var baseGraphic = new esri.Graphic(results.features[infactItem].geometry, baseGraphicsymbol, attr);
- baseGraphic.id = tempID;
- DCI.Poi.graphicslayer.add(baseGraphic);
- innerStr.push('<div class="left_list_li_box" onmouseover="DCI.Poi.onPOIMouseOverRecord(' + i + ',\'' + tempID + '\')" onmouseout="DCI.Poi.onPOIMouseOutRecord(' + i + ',\'' + tempID + '\')" id="' + pId + '">');
- innerStr.push('<div class="left_list_li_box_top">');
- innerStr.push('<div class="left2_box2">');
- innerStr.push('<img class="list_poi_marker" style="" src="' + getRootPath() + 'Content/images/poi/dw' + iId + '.png"></img>');
- innerStr.push('<div class="left_list_li1">');
- innerStr.push('<p>');
- innerStr.push('<a onclick="DCI.Poi.toLocationPOI(' + i + ',\'' + tempID + '\',\'' + results.features[infactItem].attributes.NAME + '\')">' + results.features[infactItem].attributes.NAME + '</a><br/>');
- innerStr.push('</p>');
- innerStr.push('</div>');
- innerStr.push('</div>')
- innerStr.push('</div>');
- innerStr.push('</div>');
- }
- $("#showLists").html(innerStr.join(''));
- //设置地图显示范围
- if (rExtent == null)
- rExtent = baseGraphic._extent;
- else {
- rExtent = rExtent.union(baseGraphic._extent);
- }
- DCI.Poi.map.setExtent(rExtent.expand(2));
- DCI.Poi.map.resize();
- DCI.Poi.map.reposition();
- //分页工具条
- $("#listpages").PageOperator({
- containerID: "listpages",
- count: featureCount,
- pageIndex: DCI.Poi.pageIndex,
- maxPage: maxpage,
- callback: function (pageIndex) {
- var keyword = $("#skeyword").val();
- DCI.Poi.pageIndex = pageIndex;
- DCI.Poi.search(keyword, pageIndex, DCI.Poi.pageSize);
- }
- });
- } else {
- alert("搜索不到相关数据");
- }
- }
复制代码二、空间查询模块: 1是基于QueryTask空间查询,查询指定的餐饮图层; 2是基于IdentifyTask空间查询,可以查询的图层覆盖:餐饮、住宿、金融服务、购物、科研教育、医疗服务; IdentifyTask空间查询实现核心代码: - /**
- * 所有图层的空间查询--Identify
- */
- searchIdentify: function (geometry) {
- var identifyTask = new esri.tasks.IdentifyTask(DCI.SpatialQuery.spatialQuery.layerName);//URL
- var identifyParams = new esri.tasks.IdentifyParameters();
- identifyParams.tolerance = 3;//设置绘制框选图形范围的屏幕像素距离,这个值必须要设置,不然查询不到,我用官网在线例子的默认3
- identifyParams.returnGeometry = true;//返回空间查询的geometry,方便把返回值结果以图标形式叠加在地图上
- identifyParams.layerIds = [0, 1, 2, 3, 4, 5];//设置查询图层列表
- identifyParams.layerOption = esri.tasks.IdentifyParameters.LAYER_OPTION_ALL;//设置查询的模式,我设置了可以查询所有的图层,不管是否可见,其他的模式具体参照api:https://developers.arcgis.com/javascript/3/jsapi/identifyparameters-amd.html
- identifyParams.geometry = geometry;//设置绘制框选图形范围
- identifyParams.mapExtent = DCI.SpatialQuery.map.extent;//设置查询的地图当前范围,也是必须设置的
- identifyTask.execute(identifyParams, DCI.SpatialQuery.identifyInfo);
- },
复制代码- /**
- * 所有图层的空间查询获取结果--Identify
- */
- identifyInfo: function (results) {
- //清空graphiclayer
- DCI.SpatialQuery.graphicslayer.clear();
- DCI.SpatialQuery.map.infoWindow.hide();
- var sms = new esri.symbol.PictureMarkerSymbol(getRootPath() + "Content/images/plot/point1.png", 11, 13);
- var innerStr = [];
- var featureCount = results.length;
- if (results == null || featureCount == 0) {
- DCI.Poi.addSearchErrorPage("queryshowList");
- $("#querylistpage").css({ display: "none" });
- return;
- }
- //最大的显示页面
- var maxpage = Math.ceil(featureCount / DCI.SpatialQuery.pageSize);
- $("#querylistpage").css({ display: "block" });
- if (results.length > 0) {
- for (var i = 0; i < DCI.SpatialQuery.pageSize; i++) {
- var rExtent = null;
- var iId = i + 1;
- var baseGraphicsymbol = new esri.symbol.PictureMarkerSymbol(getRootPath() + "Content/images/poi/dw" + iId + ".png", 25, 25);
- var infactItem = DCI.SpatialQuery.pageIndex * DCI.SpatialQuery.pageSize + i;
- var tempID = "tempID" + i;
- var pId = "poi_" + iId;
- if (results[infactItem] == undefined) //最后一页没有记录了 跳出循环
- break;
- var attr = { "title": results[infactItem].feature.attributes.NAME, "content": results[infactItem].feature.attributes.NAME };
- var baseGraphic = new esri.Graphic(results[infactItem].feature.geometry, baseGraphicsymbol, attr);
- baseGraphic.id = tempID;
- DCI.SpatialQuery.graphicslayer.add(baseGraphic);
- innerStr.push('<div class="left_list_li_box" onmouseover="DCI.SpatialQuery.onPOIMouseOverRecord(' + i + ',\'' + tempID + '\')" onmouseout="DCI.SpatialQuery.onPOIMouseOutRecord(' + i + ',\'' + tempID + '\')" id="' + pId + '">');
- innerStr.push('<div class="left_list_li_box_top">');
- innerStr.push('<div class="left2_box2">');
- innerStr.push('<img class="list_poi_marker" style="" src="' + getRootPath() + 'Content/images/poi/dw' + iId + '.png"></img>');
- innerStr.push('<div class="left_list_li1">');
- innerStr.push('<p>');
- innerStr.push('<a onclick="DCI.SpatialQuery.toLocation(' + i + ',\'' + tempID + '\',\'' + results[infactItem].feature.attributes.NAME + '\')">' + results[infactItem].feature.attributes.NAME + '</a><br/>');
- innerStr.push('</p>');
- innerStr.push('</div>');
- innerStr.push('</div>')
- innerStr.push('</div>');
- innerStr.push('</div>');
- }
- $("#queryshowList").html(innerStr.join(''));
- //设置地图显示范围
- if (rExtent == null)
- rExtent = baseGraphic._extent;
- else {
- rExtent = rExtent.union(baseGraphic._extent);
- }
- DCI.SpatialQuery.map.setExtent(rExtent.expand(2));
- DCI.SpatialQuery.map.resize();
- DCI.SpatialQuery.map.reposition();
- //分页工具条
- $("#querylistpage").PageOperator({
- containerID: "querylistpage",
- count: featureCount,
- pageIndex: DCI.SpatialQuery.pageIndex,
- maxPage: maxpage,
- callback: function (pageIndex) {
- DCI.SpatialQuery.pageIndex = pageIndex;
- if (DCI.SpatialQuery.type[0] == "0") {//指定图层的空间查询
- DCI.SpatialQuery.searchSP(DCI.SpatialQuery.sgeometry);
- } else if (DCI.SpatialQuery.type[0] == "1") {//所有图层的空间查询
- DCI.SpatialQuery.searchIdentify(DCI.SpatialQuery.sgeometry);
- }
- }
- });
- } else {
- alert("搜索不到相关数据");
- }
- },
复制代码QueryTask空间查询实现核心代码: - /**
- * 指定图层的空间查询--Query
- */
- searchSP: function (geometry) {
- var queryTask = new esri.tasks.QueryTask(DCI.SpatialQuery.spatialQuery.layerName);//URL
- var query = new esri.tasks.Query();
- query.returnGeometry = true;//返回空间查询的geometry,方便把返回值结果以图标形式叠加在地图上
- query.outFields = [DCI.SpatialQuery.spatialQuery.returnFields];//设置返回值的字段
- query.geometry = geometry;//设置绘制框选图形范围
- queryTask.execute(query, DCI.SpatialQuery.navInfo);
- },
- /**
- * 所有图层的空间查询--Query
- */
- navInfo: function (results) {
- //清空graphiclayer
- DCI.SpatialQuery.graphicslayer.clear();
- DCI.SpatialQuery.map.infoWindow.hide();
- var sms = new esri.symbol.PictureMarkerSymbol(getRootPath() + "Content/images/plot/point1.png", 11, 13);
- var innerStr = [];
- var featureCount = results.features.length;
- if (results.features == null || featureCount == 0) {
- DCI.Poi.addSearchErrorPage("queryshowList");
- $("#querylistpage").css({ display: "none" });
- return;
- }
- //最大的显示页面
- var maxpage = Math.ceil(featureCount / DCI.SpatialQuery.pageSize);
- $("#querylistpage").css({ display: "block" });
- if (results.features.length > 0) {
- for (var i = 0; i < DCI.SpatialQuery.pageSize; i++) {
- var rExtent = null;
- var iId = i + 1;
- var baseGraphicsymbol = new esri.symbol.PictureMarkerSymbol(getRootPath() + "Content/images/poi/dw" + iId + ".png", 25, 25);
- var infactItem = DCI.SpatialQuery.pageIndex * DCI.SpatialQuery.pageSize + i;
- var tempID = "tempID" + i;
- var pId = "poi_" + iId;
- if (results.features[infactItem] == undefined) //最后一页没有记录了 跳出循环
- break;
- var attr = { "title": results.features[i].attributes.NAME, "content": results.features[i].attributes.NAME };
- var baseGraphic = new esri.Graphic(results.features[infactItem].geometry, baseGraphicsymbol, attr);
- baseGraphic.id = tempID;
- DCI.SpatialQuery.graphicslayer.add(baseGraphic);
- innerStr.push('<div class="left_list_li_box" onmouseover="DCI.SpatialQuery.onPOIMouseOverRecord(' + i + ',\'' + tempID + '\')" onmouseout="DCI.SpatialQuery.onPOIMouseOutRecord(' + i + ',\'' + tempID + '\')" id="' + pId + '">');
- innerStr.push('<div class="left_list_li_box_top">');
- innerStr.push('<div class="left2_box2">');
- innerStr.push('<img class="list_poi_marker" style="" src="' + getRootPath() + 'Content/images/poi/dw' + iId + '.png"></img>');
- innerStr.push('<div class="left_list_li1">');
- innerStr.push('<p>');
- innerStr.push('<a onclick="DCI.SpatialQuery.toLocation(' + i + ',\'' + tempID + '\',\'' + results.features[infactItem].attributes.NAME + '\')">' + results.features[infactItem].attributes.NAME + '</a><br/>');
- innerStr.push('</p>');
- innerStr.push('</div>');
- innerStr.push('</div>')
- innerStr.push('</div>');
- innerStr.push('</div>');
- }
- $("#queryshowList").html(innerStr.join(''));
- //设置地图显示范围
- if (rExtent == null)
- rExtent = baseGraphic._extent;
- else {
- rExtent = rExtent.union(baseGraphic._extent);
- }
- DCI.SpatialQuery.map.setExtent(rExtent.expand(2));
- DCI.SpatialQuery.map.resize();
- DCI.SpatialQuery.map.reposition();
- //分页工具条
- $("#querylistpage").PageOperator({
- containerID: "querylistpage",
- count: featureCount,
- pageIndex: DCI.SpatialQuery.pageIndex,
- maxPage: maxpage,
- callback: function (pageIndex) {
- DCI.SpatialQuery.pageIndex = pageIndex;
- if (DCI.SpatialQuery.type[0] == "0") {//指定图层的空间查询
- DCI.SpatialQuery.searchSP(DCI.SpatialQuery.sgeometry);
- } else if (DCI.SpatialQuery.type[0] == "1") {//所有图层的空间查询
- DCI.SpatialQuery.searchIdentify(DCI.SpatialQuery.sgeometry);
- }
- }
- });
- } else {
- alert("搜索不到相关数据");
- }
- }
复制代码
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