?using System;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Net;
using System.IO;


/// <summary>
/// Weather 的摘要說明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Weather : System.Web.Services.WebService {

    public Weather () {

        //如果使用設(shè)計(jì)的組件，請取消注釋以下行 
        //InitializeComponent(); 
    }

    [WebMethod]
    public string GetWeather(string city)
    {
        string weacherhtml = String.Empty;
        //轉(zhuǎn)換輸入?yún)?shù)的編碼類型
        string mycity = System.Web.HttpUtility.UrlEncode(city, System.Text.UnicodeEncoding.GetEncoding("GB2312"));  
        //初始化新的 WebRequest
        HttpWebRequest webrt = (HttpWebRequest)WebRequest.Create("http://php.weather.sina.com.cn/search.php?city="+mycity  );
        //返回對 Internet 請求的響應(yīng)。
        HttpWebResponse webrs = (HttpWebResponse)webrt.GetResponse();
       
        //從 Internet 資源返回?cái)?shù)據(jù)流。
        Stream stream = webrs.GetResponseStream();
        
        //讀取數(shù)據(jù)流
        StreamReader srm = new StreamReader(stream,System.Text.Encoding.Default);
        //從頭讀到尾，把數(shù)據(jù)讀到weacherhtml中
        weacherhtml = srm.ReadToEnd();
        //關(guān)閉打開的資源
        srm.Close();
        stream.Close();
        webrs.Close();
        //針對不同的網(wǎng)站，以下開始部分和結(jié)束部分不同。
        //可通過查看網(wǎng)站的源文件解決。
        int start = weacherhtml.IndexOf("城市天氣 begin");
        int end = weacherhtml.IndexOf("城市天氣 end");
        //返回一個(gè)HTML的Table,預(yù)報(bào)城市天氣
        return weacherhtml.Substring(start+14, end - start);
    }
    
}