发布:2015/9/5 0:42:10作者:管理员 来源:本站 浏览次数:1315
C#通过Google Map获取给定地名的经纬度值之方法
参考了网上部分资料,自己改写了一个方便的获取经纬度信息的类Geo,其中Latitude和Longtitude分别是纬度和经度。其中最重要的构造函数就是传入地名,通过Webrequest从Google Map获得经纬度值,在含有地理位置信息的项目里可以很方便的调用,即Geo g = new Geo("北京师范大学");然后g.Latitude和g.Longtitude就是北京师范大学的纬度和经度了,它们分别是39.9614580,116.3692820。Geo的实现如下:
using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
namespace YourNameSpace
{
/// <summary>
/// a class for latitude and longtitude
/// </summary>
[Serializable]
public class Geo
{
/// <summary>
/// latitude
/// </summary>
private string _latitude = "";
/// <summary>
/// longtitude
/// </summary>
private string _longtitude = "";
/// <summary>
/// default constructor
/// </summary>
public Geo()
{
}
/// <summary>
/// construct geo given latitude and longtitude
/// </summary>
/// <param name="latitude"></param>
/// <param name="longtitude"></param>
public Geo(string latitude, string longtitude)
{
_latitude = latitude;
_longtitude = longtitude;
}
/// <summary>
/// construct geo given name of a place
/// </summary>
/// <param name="location"></param>
public Geo(string location)
{
string output = "csv";
string url = string.Format("http://maps.google.com/maps/geo?q={0}&output={1}", location, output);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
using (StreamReader sr = new StreamReader(response.GetResponseStream()))
{
string[] tmpArray = sr.ReadToEnd().Split(',');
_latitude = tmpArray[2];
_longtitude = tmpArray[3];
}
}
/// <summary>
/// get latitude(纬度)
/// </summary>
public string Latitude
{
get { return _latitude; }
set { _latitude = value; }
}
/// <summary>
/// get longtitude(经度)
/// </summary>
public string Longtitude
{
get { return _longtitude; }
set { _longtitude = value; }
}
}
}
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