I am trying to get unique values from an only field from a service and after displaying field values in a listbox.
Here (http://forums.esri.com/Thread.asp?c=158&f=2396&t=277241#top )there is an example that shows several fields in a first listbox, and after shows the fields values in a second listboxs
How could i do the same but with an only FIELD instead of an array of field. I only need to display the values of an only field in a listbox.
Anyone could help??? Any idea about how to subsitute ana array of fields per an single field in this code html??
Thank you very much. I am not developer and this is quite difficult for me
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>requestfieldvalues</title>
<script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=1.3"></script>
<script type="text/javascript" charset="utf-8">
dojo.require("esri.utils");
dojo.require("esri.tasks.query");
var queryTask, query;
function init() {
queryTask = new esri.tasks.QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/2");
query = new esri.tasks.Query();
query.where = "1=1";
getFieldList();
}
dojo.addOnLoad(init);
function getFieldList() {
esri.request({
url: "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/0",
content: { f:"json" },
handleAs: "json",
callbackParamName: "callback",
load: function(response, io) {
var fields = response.fields;
var options = [];
dojo.forEach(fields, function(field) {
options.push("<option value=\"" + field.name + "\">" + field.alias + "</option>");
});
dojo.byId("fields").innerHTML = options.join("");
},
error: function(error) {
alert(error.message);
}
});
}
function getFieldValues(field) {
query.outFields = [field];
queryTask.execute(query, dojo.partial(displayValues, field));
}
function displayValues(field, featureSet) {
var options = [], values = [], value;
dojo.forEach(featureSet.features, function(feature) {
value = feature.attributes[field];
//add all values
// options.push("<option value=\"" + value + ">" + value + "</option>");
//filter values to only display unique values
if (dojo.indexOf(values, value) == -1) {
values.push(value);
options.push("<option value=\"" + value + "\">" + value + "</option>");
}
});
dojo.byId("values").innerHTML = options.join("");
}
</script>
</head>
<body>
<select id="fields" onchange="getFieldValues(this.value);"></select>
<select id="values" onchange="getFieldValues(this.value);"></select>
</body>
</html>
