我有两个组合框独立工作。我想让他们一起工作。我要么查询州名，要么查询农田。我不能让它们都一起过滤。
查询得克萨斯州和4英亩。获取德克萨斯州的所有4英亩县。现在，它会给我全德克萨斯州或美国的所有4英亩县。
if语句位于“ app”对象中。
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no" />
<title>Drop Down Test</title>
<link rel="stylesheet" href="http://js.arcgis.com/3.10/js/dojo/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="http://js.arcgis.com/3.10/js/esri/css/esri.css">
<style>
html,
body,
#mainWindow {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
}
body {
background-color: #FFF;
overflow: hidden;
font-family: "Trebuchet MS";
}
#header {
height: 3%;
overflow: auto;
}
</style>
<script>
var dojoConfig = {
parseOnLoad: true
};
</script>
<script src="http://js.arcgis.com/3.10/"></script>
<script>
var map;
require([
"esri/map",
"dojo/on",
"esri/tasks/query",
"esri/layers/FeatureLayer",
"dojo/store/Memory",
"dojo/_base/array",
"dojo/_base/lang",
"esri/request",
"dojo/json",
"dijit/layout/BorderContainer",
"dijit/layout/ContentPane",
"dijit/form/Button",
"dijit/form/ComboBox",
"dojo/domReady!"
], function(
Map, on, Query, FeatureLayer, Memory, array, lang, esriRequest, json
) {
map = new Map("map", {
basemap: "topo",
center: [-98.579729, 39.828366],
zoom: 5
});
var crops = new FeatureLayer("https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/USA_County_Crops_2007/FeatureServer/0", {
mode: FeatureLayer.MODE_SELECTION,
outFields: ["*"]
});
map.addLayers([crops]);
map.on("layers-add-result", lang.hitch(this, function(){
var url = "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/USA_County_Crops_2007/FeatureServer/0/generateRenderer";
var classificationDef = {"type":"uniqueValueDef","uniqueValueFields":["STATE"]};
var classificationDef2 = {"type":"uniqueValueDef","uniqueValueFields":["TotalFarmedAcres"]};
var str = json.stringify(classificationDef);
var str2 = json.stringify(classificationDef2);
esriRequest({
url:url,
content:{
classificationDef:str,
f:'json'
},
handleAs:'json',
callbackParamName:'callback',
timeout:15000
}).then(lang.hitch(this,function(response){
var uniqueValueInfos = response && response.uniqueValueInfos;
if(uniqueValueInfos){
var store2 = new Memory({data:[]});
dijit.byId("uniqueValuesSelect").set('store',store2);
var data = array.map(uniqueValueInfos,lang.hitch(this,function(info,index){
var value = info.value;
//value = parseFloat(value);
var dataItem = {
id:index,
name:value
};
return dataItem;
}));
store2 = new Memory({data:data});
dijit.byId("uniqueValuesSelect").set('store',store2);
}
}),lang.hitch(this,function(error){
console.error(error);
}));
esriRequest({
url:url,
content:{
classificationDef:str2,
f:'json'
},
handleAs:'json',
callbackParamName:'callback',
timeout:15000
}).then(lang.hitch(this,function(response){
var uniqueValueInfos2 = response && response.uniqueValueInfos;
if(uniqueValueInfos2){
var store3 = new Memory({data:[]});
dijit.byId("uniqueValuesSelect2").set('store',store3);
var data2 = array.map(uniqueValueInfos2,lang.hitch(this,function(info,index){
var value2 = info.value;
//value2 = parseFloat(value2);
var dataItem2 = {
id:index,
name:value2
};
return dataItem2;
}));
store3 = new Memory({data:data2});
dijit.byId("uniqueValuesSelect2").set('store',store3);
}
}),lang.hitch(this,function(error){
console.error(error);
}));
}));
app = {
zoomRow: function(id, which){
crops.clearSelection();
var query = new Query();
if(which == "statename"){
query.where = "STATE='" + (id).toString() + "'";
}if(which == "FarmedAcres"){
query.where = "TotalFarmedAcres='" + (id).toString() + "'";
}
console.info(query.where);
query.returnGeometry = true;
crops.selectFeatures(query, FeatureLayer.SELECTION_NEW, function (features) {
//var thePoly = features[0].geometry;
//var theExtent = thePoly.getExtent().expand(2); //Zoom out slightly from the polygon's extent
//map.setExtent(theExtent);
});
}
};
});
</script>
</head>
<body class="claro">
<div id="mainWindow" data-dojo-type="dijit/layout/BorderContainer" data-dojo-props="design:'headline', gutters:false" style="padding:0px;margin:0px;">
<div id="header" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'top'" style="overflow:hidden;border:none;border-bottom: 3px solid #CC9900;font-family: Windows;font-size:14pt; color: #FFFFFF;background: #000000; "> Select a State and total Acres farmed:
<input id="uniqueValuesSelect" data-dojo-type="dijit.form.ComboBox" value="statename" onchange="app.zoomRow(document.getElementById('uniqueValuesSelect').value, 'statename');" />
<input id="uniqueValuesSelect2" data-dojo-type="dijit.form.ComboBox" value="FarmedAcres" onchange="app.zoomRow(document.getElementById('uniqueValuesSelect2').value, 'FarmedAcres');" />
</div>
<div id="map" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'left'" style="width:100%;height:95%;border:none;padding:0px;margin:0px;"></div>
</div>
</body>
</html>
答案 0 :(得分：1)
您需要同时访问两个组合框，这样您才能执行以下操作：
import pandas as pd
import numpy as np
new_dataframe = pd.read_hdf(r"C:\hd files of pa\datafile1")
dataframe_with_size = pd.read_hdf(r"Y:\forsiye\New Text Document.txt.hd5")
sizes = dataframe_with_size.loc[dataframe_with_size.loc[:, "size"] != 0, "size"].values
random = np.random.RandomState(seed=1)
new_dataframe['size'] = random.choice(
sizes,
size=new_dataframe.shape[0],
replace=True
)
new_dataframe1 = pd.read_hdf(r"C:\hd files of pa\datafile2")
dataframe_with_size1 = pd.read_hdf(r"Y:\forsiye\New Text Document.txt.hd5")
sizes = dataframe_with_size1.loc[dataframe_with_size1.loc[:, "size"] != 0, "size"].values
[![enter image description here][1]][1]
random = np.random.RandomState(seed=1)
new_dataframe1['size'] = random.choice(
sizes,
size=new_dataframe1.shape[0],
replace=True
)
new_dataframe['size'].hist(bins = 300)
new_dataframe1['size'].hist(bins = 300)
这意味着html应该是这样的
app = {
zoomRow: function(stateId, acresId){
crops.clearSelection();
var query = new Query();
query.where = "STATE='" + (stateId).toString() + "' AND TotalFarmedAcres='" + (acresId).toString() + "'";
console.info(query.where);
query.returnGeometry = true;
crops.selectFeatures(query, FeatureLayer.SELECTION_NEW, function (features) {
//var thePoly = features[0].geometry;
//var theExtent = thePoly.getExtent().expand(2); //Zoom out slightly from the polygon's extent
//map.setExtent(theExtent);
});
}
};
向stateId，acresId添加相应的验证，以避免出现空值或未定义的值