挪用定名空间：
using System.Net;
using System.IO;
using System.Xml;
挪用事例：
private string GetAddress(string lng, string lat)
{
try
{
string url = @"http://api.map.baidu.com/geocoder/v2/?ak=oGdNg8wTEMEIsC0uzqqD3nq0&callback=renderReverse&location=" + lat + "," + lng + @"&output=xml&pois=1";
WebRequest request = WebRequest.Create(url);
request.Method = "POST";
XmlDocument xmlDoc = new XmlDocument();
string sendData = xmlDoc.InnerXml;
byte[] byteArray = Encoding.Default.GetBytes(sendData);
Stream dataStream = request.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
WebResponse response = request.GetResponse();
dataStream = response.GetResponseStream();
StreamReader reader = new StreamReader(dataStream, System.Text.Encoding.GetEncoding("utf-8"));
string responseXml = reader.ReadToEnd();
XmlDocument xml = new XmlDocument();
xml.LoadXml(responseXml);
string status = xml.DocumentElement.SelectSingleNode("status").InnerText; if (status == "0")
{
XmlNodeList nodes = xml.DocumentElement.GetElementsByTagName("formatted_address");
if (nodes.Count > 0)
{
return nodes[0].InnerText;
}
else
return "未获取到位置信息,错误码3";
}
else
{
return "未获取到位置信息,错误码1";
}
}
catch (System.Exception ex)
{
return "未获取到位置信息,错误码" + ex + "";
}
}
---注意：
当status=“0”但nodes[0].InnerText功效依然为null时，在网址上检察url是否可以得到数据。
，