WebService获取Google天气信息

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Text;
using System.Configuration;
using System.Net;
using System.IO;
using System.Xml;
namespace TongLu.Weather
{
/// <summary>
/// Summary description for GetWeather
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
public class GetWeather : System.Web.Services.WebService
{

[WebMethod]
public string GetWeathers(int lng, int lat) //传入的坐标: 例如： 30670000,104019996
{
string BaseURI = http://www.google.com.hk/ig/api?hl=zh-cn string weather = ",,," + lng + "," + lat;
string RequestUrl = BaseURI + "&weather=" + weather;
string ListXml = SendRequestBackXml(RequestUrl, "");
string s = WeatherExecue(ListXml);
return s;
}
private string SendRequestBackXml(string Uri, string ContentStr)
{
try
{
HttpWebRequest MyRequest = (HttpWebRequest)WebRequest.Create(Uri);
MyRequest.Timeout = 30000;
MyRequest.KeepAlive = true;
MyRequest.ContentType = "application/x-www-form-urlencoded";
MyRequest.Method = WebRequestMethods.Http.Post;
byte[] RequestBytes = Encoding.ASCII.GetBytes(ContentStr);
Stream swt = MyRequest.GetRequestStream();
swt.Write(RequestBytes, 0, RequestBytes.Length);
swt.Flush();
swt.Close();
HttpWebResponse MyResponse = (HttpWebResponse)MyRequest.GetResponse();
StreamReader srd = new StreamReader(MyResponse.GetResponseStream(), Encoding.GetEncoding("GB2312"));
string BackContent = srd.ReadToEnd();
srd.Close();
MyResponse.Close();
return BackContent;
}
catch (Exception e)
{
return string.Empty;
}
}
/// <summary>
/// 获取天气信息
/// </summary>
/// <param name="cities"></param>
/// <returns></returns>
private string WeatherExecue(string cities)
{
StringBuilder SB = new StringBuilder();
if (string.IsNullOrEmpty(cities))
{
return null;
}
XmlDocument doc = new XmlDocument();
doc.LoadXml(cities);
XmlNode root = doc.DocumentElement;
if (root.SelectSingleNode("descendant::weather").FirstChild.Name == "problem_cause")
{
return null;
}
XmlNodeList NodeList = root.SelectNodes("weather/forecast_conditions");
string day = NodeList.Item(0).SelectSingleNode("day_of_week").Attributes["data"].InnerText;
string low = NodeList.Item(0).SelectSingleNode("low").Attributes["data"].InnerText;
string high = NodeList.Item(0).SelectSingleNode("high").Attributes["data"].InnerText;
string picPath = "http://www.google.com" + NodeList.Item(0).SelectSingleNode("icon").Attributes["data"].InnerText;//获取远程图片地址
string condition= NodeList.Item(0).SelectSingleNode("condition").Attributes["data"].InnerText;
SB.Append("<img width='30'heigh='20' ");
SB.Append("src='");
SB.Append(picPath);
SB.Append("'/>");
SB.Append(low);
SB.Append("℃");
SB.Append("/");
SB.Append(high);
SB.Append("℃");
SB.Append("<br/>");
SB.Append(day);
SB.Append(" 天气:");
SB.Append(condition);
return SB.ToString();
}
}
}