根据经度和纬度返回地理位置 LocationAPi-优快云博客

本文介绍了一个使用Geonames API从经纬度坐标获取详细地址的方法。通过构造HTTP请求并解析XML响应来实现地理逆向定位的功能。

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View Code

publicclass LocationAPI
{
privatestaticstring GeoCodeUrl = ConfigurationManager.AppSettings["GeoCodeUrl"];
privatestaticstring GoogleGearUrl = ConfigurationManager.AppSettings["GoogleGearUrl"];
privatestaticstring UseGoogleReverse = ConfigurationManager.AppSettings["UseGoogleReverse"];

///<summary>
/// Initializes a new instance of the <see cref="LocationAPI"/> class.
///</summary>
public LocationAPI()
{

}

publicstaticstring GetAddressFromLL(string Lat, string Lng)
{

string url ="http://ws.geonames.org/findNearestAddress?lat="+ Lat +"&lng="+ Lng;
WebResponse response =null;
Stream stream =null;
StreamReader reader =null;

try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.UserAgent =@"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.40607; .NET CLR 1.1.4322)";
request.Timeout =1;
response = request.GetResponse();
stream = response.GetResponseStream();
reader =new StreamReader(stream, System.Text.Encoding.UTF8);
XmlDocument xDoc =new XmlDocument();
xDoc.Load(stream);
XmlNode xStreet = xDoc.SelectSingleNode("geonames/address/street");
XmlNode xStreetNumber = xDoc.SelectSingleNode("geonames/address/streetNumber");
XmlNode xPlacename = xDoc.SelectSingleNode("geonames/address/placename");
XmlNode xCountryCode = xDoc.SelectSingleNode("geonames/address/countryCode");
string address = xStreet.InnerText +""+ xStreetNumber.InnerText +", "+ xPlacename.InnerText +", "+ xCountryCode.InnerText +"";
return address;

}
catch(Exception ex)
{
DAL.Log.Write(DateTime.Now.ToString() +"\0"+ ex.Message.ToString() +"\r\n");
return"UnKnown";
}
finally
{
if (reader !=null) reader.Close();
if (stream !=null) stream.Close();
if (response !=null) response.Close();
}
}
}

转载于:https://www.cnblogs.com/lelese7en/archive/2011/06/07/2074124.html