<%@ WebService Language="c#" Class="WeatherWS.GetChinaWeather" %>
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Net;
using System.Text;
using System.IO;
using System.Web;
using System.Web.Services;
namespace WeatherWS
{
?/// <summary>
?/// GetChinaWeather 的摘要说明。
?/// </summary>
?[WebService(Namespace="http://flying.redv.com/monster")]
?public class GetChinaWeather : System.Web.Services.WebService
?{
??public GetChinaWeather()
??{
???//CODEGEN: 该调用是 ASP.NET Web 服务设计器所必需的
???InitializeComponent();
??}
??#region 组件设计器生成的代码
??
??//Web 服务设计器所必需的
??private IContainer components = null;
????
??/// <summary>
??/// 设计器支持所需的方法 - 不要使用代码编辑器修改
??/// 此方法的内容。
??/// </summary>
??private void InitializeComponent()
??{
??}
??/// <summary>
??/// 清理所有正在使用的资源。
??/// </summary>
??protected override void Dispose( bool disposing )
??{
???if(disposing && components != null)
???{
????components.Dispose();
???}
???base.Dispose(disposing);??
??}
??
??#endregion
??[WebMethod(Description="中国各城市(县)天气预报获取服务,可接受一字符串参数（可选的查询方式：·国内城市（县）全名·字首拼音缩写·电话区号·邮政编码,如查询徐州的天气情况可输入'徐州'或'xz'作为参数）")]
??public DataSet getWeather(string strCity)
??{
???DataSet dsWeather = new DataSet();
???try
???{
????const int maxDay=5;
????string []time = new string[maxDay];//存储日期，从今天开始算起
????string []weather = new string[maxDay];//保存天气情况数据
????string []max = new string[maxDay];//保存最高温度数据
????string []min = new string[maxDay];//保存最低温度数据
????string []wind = new string[maxDay];//保存风向数据
????//发送一个post请求到index.jsp页面以获取城市数据
????Uri uri = new Uri("http://www.weathercn.com/forecastn/forcast/index.jsp?searchname="+System.Web.HttpUtility.UrlEncode(strCity,System.Text.Encoding.GetEncoding("GB2312")));
????WebRequest wreq=WebRequest.Create(uri);
??
????HttpWebResponse wresp=(HttpWebResponse)wreq.GetResponse();
??
????string HTML ="";
????Stream s=wresp.GetResponseStream();
??
????StreamReader objReader = new StreamReader(s,System.Text.Encoding.Default);
????HTML=objReader.ReadToEnd();
????if(HTML==null||HTML=="")
?????return dsWeather;
????HTML = HTML.ToLower();//全部转换为小写
????if(HTML==null||HTML=="")
?????return dsWeather;
????int head,tail,i;
????//查找城市数据 如果没有找到 则返回一个空的dataset
????head = HTML.IndexOf("查询结果：",0);
????head = HTML.IndexOf("station_name=",head);
????if(head==-1)
????{
?????return dsWeather;
????}
????head = HTML.IndexOf("station_name=",head+1);
????tail = HTML.IndexOf("'",head);
????string strCityData = HTML.Substring(head,tail-head);//城市数据获取
????string href = "http://www.weathercn.com/forecastn/forcast/forecastDetail.jsp?"+strCityData;
????//根据城市数据去查询天气情况
????
????wreq=WebRequest.Create(href);
????wresp=(HttpWebResponse)wreq.GetResponse();
??
????HTML ="";
????s=wresp.GetResponseStream();
??
????objReader = new StreamReader(s,System.Text.Encoding.Default);
????HTML=objReader.ReadToEnd();
????if(HTML==null||HTML=="")
?????return dsWeather;
????HTML = HTML.ToLower();//全部转换为小写
????
????DateTime dtNow = new DateTime();
????dtNow = DateTime.Today;//获取系统当前日期
????dtNow = dtNow.Subtract(TimeSpan.Parse("1"));
????for(i=0;i<maxDay;i++)
????{
?????dtNow = dtNow.Add(TimeSpan.Parse("1"));
?????time[i] = dtNow.ToShortDateString();//日期数据
????}
????
????//获取天气情况数据,总共maxDay天的数据
????String date = DateTime.Now.Year.ToString()+"年"+DateTime.Now.Month.ToString()+"月";//当前年月
????head = HTML.IndexOf(date,0);
????head = HTML.IndexOf("<tr>",head);
????for(i=0;i<maxDay;i++)
????{
?????head = HTML.IndexOf("<td",head);
?????head = HTML.IndexOf("<img",head);
?????head = HTML.IndexOf("/",head+1);
?????tail = HTML.IndexOf("_",head);
?????weather[i] = HTML.Substring(head+1,tail-head-1);
?????head = HTML.IndexOf("</td>",head);
????}
????//获取近maxDay天温度数据,包括最高温度和最低温度
????for(i=0;i<maxDay;i++)
????{
?????head = HTML.IndexOf("max",head);
?????head = HTML.IndexOf(">",head);
?????tail = HTML.IndexOf("<",head);
?????max[i] = HTML.Substring(head+1,tail-head-1);//最高温度
?????head = HTML.IndexOf("min",head);
?????min[i] = HTML.Substring(head+1,tail-head-1);//最低温度
????}
????//最近maxDay天的风向数据
????head = HTML.IndexOf("<tr",head);
????for(i=0;i<maxDay;i++)
????{
?????head = HTML.IndexOf("class",head);
?????wind[i] = HTML.Substring(head+1,tail-head-1);//风向数据
????}
????//将数据填充到DataSet中去
????DataTable dtWeather = new DataTable();
????dtWeather.Columns.Add("日期");
????dtWeather.Columns.Add("天气");
????dtWeather.Columns.Add("最高温度");
????dtWeather.Columns.Add("最低温度");
????dtWeather.Columns.Add("风力风向");
????for(i=0;i<maxDay;i++)
????{
?????DataRow drWeather = dtWeather.NewRow();
?????drWeather["日期"] = time[i];
?????drWeather["天气"] = weather[i];
?????drWeather["最高温度"] = max[i];
?????drWeather["最低温度"] = min[i];
?????drWeather["风力风向"] = wind[i];
?????dtWeather.Rows.Add(drWeather);
????}
????dsWeather.Tables.Add(dtWeather);
????dsWeather.AcceptChanges();
????return dsWeather;
???}???catch(Exception e)???{????//DO Something????return dsWeather;???}??}?}}
