using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;using System.Net;using System.IO;namespace WebApplication1{ /// <summary> /// Summary description for WebForm1. /// </summary> public class WebForm1 : System.Web.UI.Page { protected System.Web.UI.WebControls.Label l_date; protected System.Web.UI.WebControls.Label l_city; protected System.Web.UI.WebControls.Label l_wea; protected System.Web.UI.WebControls.Label l_sky; protected System.Web.UI.WebControls.Label l_w1; protected System.Web.UI.WebControls.Label l_w2; protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.Label Label1; protected System.Web.UI.WebControls.Label l_w3; protected System.Web.UI.WebControls.Label l_w4; protected System.Web.UI.WebControls.DropDownList ddlcity; private void Page_Load(object sender, System.EventArgs e) { if (!Page.IsPostBack) { writeWeatherInfo(ddlcity.SelectedValue); writeWeather(ddlcity.SelectedValue); } }
#region getWeatherByCity 通过城市过虑 public string getWeatherByCity(string city) { string temp = null; try { string strURL = "http://weather.news.sina.com.cn/cgi-bin/figureWeather/search.cgi"; HttpWebRequest request= (HttpWebRequest)WebRequest.Create(strURL);//使用 WebRequest.Create 方法初始化 HttpWebRequest 的一个新实例。如果 URI 的方案是 http:// 或 https://，则 Create 将返回 HttpWebRequest 实例。 request.Method="POST"; //Post请求方式 request.ContentType="application/x-www-form-urlencoded"; //内容类型 string paraUrlCoded = System.Web.HttpUtility.UrlEncode("city"); //参数经过URL编码 paraUrlCoded = paraUrlCoded + "=" + System.Web.HttpUtility.UrlEncode(city, System.Text.Encoding.GetEncoding("GB2312")); byte[] payload = System.Text.Encoding.GetEncoding("GB2312").GetBytes(paraUrlCoded); //将URL编码后的字符串转化为字节 request.ContentLength = payload.Length; //设置请求的ContentLength Stream writer = request.GetRequestStream(); //获得请求流 writer.Write(payload,0,payload.Length); //将请求参数写入流 writer.Close(); //关闭请求流 HttpWebResponse response = (HttpWebResponse)request.GetResponse(); //获得响应流 Stream s= response.GetResponseStream(); StreamReader objReader = new StreamReader(s,System.Text.Encoding.GetEncoding("GB2312")); string HTML = ""; string sLine = ""; int i = 0; while (sLine!=null) { i++; sLine = objReader.ReadLine(); if (sLine!=null) HTML += sLine; } HTML = HTML.Replace("<","<"); HTML = HTML.Replace(">",">"); int start,stop; //start = HTML.IndexOf("<img src=/"http://image2.sina.com.cn/dy/weather/images/figure/",0,HTML.Length); start = HTML.IndexOf("<table border=0 cellpadding=0 cellspacing=0 style=/"margin:5px;/">",0,HTML.Length); stop = HTML.IndexOf("<td background=http://image2.sina.com.cn/dy/weather/images",start); temp = HTML.Substring(start, stop - start); } catch (Exception x) { } return temp; }
#endregion
#region writeWeatherInfo 显示处理后的信息 private void writeWeatherInfo(string city) { int start,stop; string weather1,weather2,wea; string wea_city = getWeatherByCity(city);
wea_city = wea_city.Replace(" ","");
start = wea_city.IndexOf("<b>",0,wea_city.Length); stop = wea_city.IndexOf("</b>", start); weather1 = wea_city.Substring(start, stop-start).Trim() + " "; weather1 = weather1.Substring(3,8).Trim(); start = wea_city.IndexOf("<tdstyle=/"font-size:40px;font-family:TimesNewRoman;font-weight:bold;/">",0,wea_city.Length); stop = wea_city.IndexOf("℃",start) + 40; weather2 = wea_city.Substring(start, stop-start); weather2 = weather2.Substring(stop-start-42,40).Trim(); weather2 = weather2.Replace("/t","");
start = wea_city.IndexOf("<fontcolor=#183888><b>", 0, wea_city.Length); stop = wea_city.IndexOf("</b></font>",start); wea = wea_city.Substring(start,stop-start); wea = wea.Substring(22,wea.Length-22) + "kbrk"; wea = wea.Replace("/t", ""); wea = wea.Replace(">", "k"); wea = wea.Replace("<", "k"); wea = wea.Replace("kbrk", "k"); string [] wall = null; char[] seperator = {'k'}; wall = wea.Split(seperator);
l_city.Text = "[城市]：" + city;//城市 l_wea.Text = "[天气]：" + weather1;//天气 l_sky.Text = "[温度]：" + weather2;//温度 l_date.Text = wall[0];//日期 l_w1.Text = wall[1];//风向 l_w2.Text = wall[2];//风力 l_w3.Text = wall[3]; //空气质量 l_w4.Text = wall[4]; //紫外线强度 } #endregion
#region writeWeather 直接显示读取到的信息 private void writeWeather(string city) { string wea_city = getWeatherByCity(city); Response.Write(wea_city); } #endregion #region Button1_Click private void Button1_Click(object sender, System.EventArgs e) { writeWeatherInfo(ddlcity.SelectedValue); writeWeather(ddlcity.SelectedValue); } #endregion
#region Web Form Designer generated code override protected void OnInit(EventArgs e) { // // CODEGEN: This call is required by the ASP.NET Web Form Designer. // InitializeComponent(); base.OnInit(e); } /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.Button1.Click += new System.EventHandler(this.Button1_Click); this.Load += new System.EventHandler(this.Page_Load);
} #endregion
}}
源码：http://singlepine.cnblogs.com/Files/singlepine/Weather.rar
