C#通過Google Map獲取給定地名的經緯度值

改寫了一個方便的獲取經緯度信息的類Geo，其中Latitude和Longtitude分別是緯度和經度。其中最重要的構造函數就是傳入地名，通過Webrequest從Google Map獲得經緯度值，在含有地理位置信息的項目裏可以很方便的調用，即Geo g = new Geo("北京師範大學");然後g.Latitude和g.Longtitude就是北京師範大學的緯度和經度了，它們分別是39.9614580，116.3692820。Geo的實現如下：

using System; using System.Collections.Generic; using System.Text; using System.Net; using System.IO; namespace 獲取經緯度 { /// /// a class for latitude and longtitude /// [Serializable] public class Geo { /// /// latitude /// private string _latitude = ""; /// /// longtitude /// private string _longtitude = ""; /// /// default constructor /// public Geo() { } /// /// construct geo given latitude and longtitude /// public Geo(string latitude, string longtitude) { _latitude = latitude; _longtitude = longtitude; } /// /// construct geo given name of a place /// public Geo(string location) { string output = "csv"; string url = string.Format("http://maps.google.com/maps/geo?q={0}&output={1}", location, output); try { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) { using (StreamReader sr = new StreamReader(response.GetResponseStream())) { string[] tmpArray = sr.ReadToEnd().Split(','); _latitude = tmpArray[2]; _longtitude = tmpArray[3]; } } } catch (System.Net.Sockets.SocketException ex) { Console.WriteLine("網絡中斷"); } catch (Exception ex) { //throw ex; Console.WriteLine("異常類型：{0}", ex.GetType()); Console.WriteLine("異常信息：{0}", ex.Message); Console.WriteLine("異常來源：{0}", ex.Source); Console.WriteLine("異常堆棧：{0}", ex.StackTrace); Console.WriteLine("內部異常：{0}", ex.InnerException); } } /// /// get latitude /// public string Latitude { get { return _latitude; } set { _latitude = value; } } /// /// get longtitude /// public string Longtitude { get { return _longtitude; } set { _longtitude = value; } } } }