Localizar geograficamente usuários pelo IP com ASP.NET (Geolocation)

<table>
	<tr>
		<td>
			<strong>statusCode</strong>
		</td>
		<td>
			<asp:Literal ID="litStatusCode" runat="server" />
		</td>
	</tr>
	<tr>
		<td>
			<strong>statusMessage</strong>
		</td>
		<td>
			<asp:Literal ID="litStatusMessage" runat="server" />
		</td>
	</tr>
	<tr>
		<td>
			<strong>ipAddress</strong>
		</td>
		<td>
			<asp:Literal ID="litIpAddress" runat="server" />
		</td>
	</tr>
	<tr>
		<td>
			<strong>countryCode</strong>
		</td>
		<td>
			<asp:Literal ID="litCountryCode" runat="server" />
		</td>
	</tr>
	<tr>
		<td>
			<strong>countryName</strong>
		</td>
		<td>
			<asp:Literal ID="litCountryName" runat="server" />
		</td>
	</tr>
	<tr>
		<td>
			<strong>regionName</strong>
		</td>
		<td>
			<asp:Literal ID="litRegionName" runat="server" />
		</td>
	</tr>
	<tr>
		<td>
			<strong>cityName</strong>
		</td>
		<td>
			<asp:Literal ID="litCityName" runat="server" />
		</td>
	</tr>

	<tr>
		<td>
			<strong>zipCode</strong>
		</td>
		<td>
			<asp:Literal ID="litZipCode" runat="server" />
		</td>
	</tr>
	<tr>
		<td>
			<strong>latitude</strong>
		</td>
		<td>
			<asp:Literal ID="litLatitude" runat="server" />
		</td>
	</tr>
	<tr>
		<td>
			<strong>longitude</strong>
		</td>
		<td>
			<asp:Literal ID="litLongitude" runat="server" />
		</td>
	</tr>
	<tr>
		<td>
			<strong>timeZone</strong>
		</td>
		<td>
			<asp:Literal ID="litTimeZone" runat="server" />
		</td>
	</tr>
</table>

protected void Page_Load(object sender, EventArgs e)
{
	//va em http://ipinfodb.com/register.php e registre-se para usar a API gratuitamente
	//após o cadastro vecê receberá uma chave, que deve ser inserida na URL da pesquisa
	const string KEY = "SUACHAVE";
	string sIP = "74.125.229.80"; //Endereço IP
	string sFormat = "xml"; //Formato de retorno pode ser: raw, xml, json
	//URL + CHAVE + IP + FORMATO
	string sUrl = "http://api.ipinfodb.com/v3/ip-city/?key=" + KEY + "&ip=" + sIP + "&format=" + sFormat;

	HttpWebRequest request = (HttpWebRequest)WebRequest.Create(sUrl);
	//request.Proxy = GlobalProxySelection.GetEmptyWebProxy();
	HttpWebResponse response = (HttpWebResponse)request.GetResponse();
	Stream stream = response.GetResponseStream();
	XmlDocument xml = new XmlDocument();
	xml.Load(stream); //Carregando o arquivo


	XmlNode nodeRoot = xml.DocumentElement;
	foreach (XmlNode xn in nodeRoot)
	{
		litStatusCode.Text = xn.ParentNode["statusCode"].InnerText;
		litStatusMessage.Text = xn.ParentNode["statusMessage"].InnerText;
		litIpAddress.Text = xn.ParentNode["ipAddress"].InnerText;
		litCountryCode.Text = xn.ParentNode["countryCode"].InnerText;
		litCountryName.Text = xn.ParentNode["countryName"].InnerText;
		litRegionName.Text = xn.ParentNode["regionName"].InnerText;
		litCityName.Text = xn.ParentNode["cityName"].InnerText;
		litZipCode.Text = xn.ParentNode["zipCode"].InnerText;
		litLatitude.Text = xn.ParentNode["latitude"].InnerText;
		litLongitude.Text = xn.ParentNode["longitude"].InnerText;
		litTimeZone.Text = xn.ParentNode["timeZone"].InnerText;
	}
}