如果我们能够在用户访问我们网站的主页时显示与用户位置相对应的信息，那将对我的业务大有裨益。我知道尝试仅从 IP 地址获取地理定位并不是一门精确的科学，但我们愿意尽我们所能。
有哪些技术可用于确定网络用户的大致位置？
请您参考如下方法:
您最好的选择是使用 google api。您可以在提交的表单字段中设置 IP。或者你可以使用 .net api
google.loader.ClientLocation to get a person's lat/long using their IP address
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" src="http://www.google.com/jsapi?key=ABQIAAAALDWeTDQHOJCbCf0JnUqL8BT2yXp_ZAY8_ufC3CFXhHIE1NvwkxQA7AE8xB9MyWgHECPY2qimOp7BUQ"></script>
<script src="scripts/clientLocation.js" type="text/javascript"></script>
<script type="text/javascript">
function $g(id) {
return document.getElementById(id);
}
function displayLocation(latitudeEl, longitudeEl, cityEl, regionEl, countryEl, country_codeEl) {
var cloc = new ClientLocation.Location(google.loader.ClientLocation);
if (latitudeEl) latitudeEl.innerHTML = cloc.latitude;
if (longitudeEl) longitudeEl.innerHTML = cloc.longitude;
if (cityEl) cityEl.innerHTML = cloc.address.city;
if (regionEl) regionEl.innerHTML = cloc.address.region;
if (country) country.innerHTML = cloc.address.country;
if (country_codeEl) country_codeEl.innerHTML = cloc.address.country_code;
}
function init() {
displayLocation($g("latitude"), $g("longitude"), $g("city"), $g("region"), $g("country"), $g("country_code"));
}
</script>
</head>
<body onload="init()">
<form id="form1" runat="server">
<div>
latitude : <span id="latitude"></span>
<br />
longitude : <span id="longitude"></span>
<br />
city : <span id="city"></span>
<br />
region : <span id="region"></span>
<br />
country : <span id="country"></span>
<br />
country_code : <span id="country_code"></span>
<br />
</div>
</form>
</body>
</html>
// <copyright file="clientLocation.js" company="Sky Sanders">
// This source is placed in the Public Domain.
// http://skysanders.net/subtext
// Attribution is appreciated.
// </copyright>
/*
object literal format for google.loader.clientlocation
{
"latitude": 33.324,
"longitude": -111.867,
"address": {
"city": "Chandler",
"region": "AZ",
"country": "USA",
"country_code": "US"
}
}
*/
var ClientLocation = {};
ClientLocation.Address = function() {
/// <field name="city" type="String" />
/// <field name="region" type="String" />
/// <field name="country" type="String" />
/// <field name="country_code" type="String" />
/// <returns type="ClientLocation.Address"/>
if (arguments.length > 0) {
this.city = arguments[0].city;
this.region = arguments[0].region;
this.country = arguments[0].country;
this.country_code = arguments[0].country_code;
return;
}
else {
this.city = "";
this.region = "";
this.country = "";
this.country_code = "";
}
}
ClientLocation.Location = function() {
/// <field name="latitude" type="Number" />
/// <field name="longitude" type="Number" />
/// <field name="address" type="ClientLocation.Address" />
if (arguments.length > 0) {
this.latitude = arguments[0].latitude;
this.longitude = arguments[0].longitude;
this.address = arguments[0].address;
}
else {
this.latitude = 0;
this.longitude = 0;
this.address = undefined;
}
}
