1 public string GetAddress(string lat, string lng) 2 { 3 try 4 { 5 string res = ""; 6 7 string url = @"http://api.map.baidu.com/geocoder/v2/?ak=ZndyfXErtTiZQwfgNgQ7yqb7ALKdk4DA&location=" + lat + "," + lng + "&output=xml"; 8 WebRequest request = WebRequest.Create(url); 9 request.Method = "POST"; 10 XmlDocument xmlDoc = new XmlDocument(); 11 string sendData = xmlDoc.InnerXml; 12 byte[] byteArray = Encoding.Default.GetBytes(sendData); 13 14 Stream dataStream = request.GetRequestStream(); 15 dataStream.Write(byteArray, 0, byteArray.Length); 16 dataStream.Close(); 17 18 WebResponse response = request.GetResponse(); 19 dataStream = response.GetResponseStream(); 20 StreamReader reader = new StreamReader(dataStream, System.Text.Encoding.GetEncoding("utf-8")); 21 string responseXml = reader.ReadToEnd(); 22 23 XmlDocument xml = new XmlDocument(); 24 xml.LoadXml(responseXml); 25 string status = xml.DocumentElement.SelectSingleNode("status").InnerText; 26 if (status == "0") 27 { 28 29 XmlNodeList nodes = xml.DocumentElement.GetElementsByTagName("formatted_address"); 30 XmlNodeList nodes1 = xml.DocumentElement.GetElementsByTagName("sematic_description"); 31 if (nodes.Count > 0 && !string.IsNullOrEmpty(nodes[0].InnerText)) 32 { 33 res += "地址信息: " + nodes[0].InnerText; 34 } 35 if (nodes1.Count > 0 && !string.IsNullOrEmpty(nodes1[0].InnerText)) 36 { 37 res += " 结果描述: " + nodes1[0].InnerText; 38 } 39 if (nodes.Count <= 0 && nodes1.Count <= 0) 40 res = "未获取到位置信息,错误码3"; 41 } 42 else 43 { 44 res = "未获取到位置信息,错误码1"; 45 } 46 return res; 47 } 48 catch (System.Exception ex) 49 { 50 return "未获取到位置信息,错误码2"; 51 } 52 }
测试连接
http://api.map.baidu.com/geocoder/v2/ak=ZndyfXErtTiZQwfgNgQ7yqb7ALKdk4DA&location=39.963175,116.400244&output=json
接口详细说明地址:http://lbsyun.baidu.com/index.php?title=webapi/guide/webservice-geocoding