用C#读取sina天气预报到wap页面(二)

public class weather : system.web.ui.mobilecontrols.mobilepage
 {
  protected system.web.ui.mobilecontrols.label label1;
  protected system.web.ui.mobilecontrols.label label2;
  protected system.web.ui.mobilecontrols.selectionlist s_weather;
  protected system.web.ui.mobilecontrols.label l_date;
  protected system.web.ui.mobilecontrols.label l_city;
  protected system.web.ui.mobilecontrols.label l_wea;
  protected system.web.ui.mobilecontrols.label l_sky;
  protected system.web.ui.mobilecontrols.label l_w1;
  protected system.web.ui.mobilecontrols.label l_w2;
  protected system.web.ui.mobilecontrols.label l_w3;
  protected system.web.ui.mobilecontrols.link link1;
  protected system.web.ui.mobilecontrols.command command1;
  protected system.web.ui.mobilecontrols.label label3;
  protected system.web.ui.mobilecontrols.form form1;

  private void page_load(object sender, system.eventargs e)
  {
   // 在此处放置用户代码以初始化页面
   if (!page.ispostback)
   {
    string city = "深圳";
    int start,stop;
    string weather1,weather2,wea;
    string wea_city = weather_city(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;
    l_wea.text = "[天气]：" + weather1;
    l_sky.text = "[温度]：" + weather2;
    ///////
    l_date.text = wall[0];
    l_w1.text = wall[1];
    l_w2.text = wall[2];
    l_w3.text = wall[3];
   }
  }

  #region web 窗体设计器生成的代码
  override protected void oninit(eventargs e)
  {
   //
   // codegen: 该调用是 asp.net web 窗体设计器所必需的。
   //
   initializecomponent();
   base.oninit(e);
  }

  /// <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()
  {   
   this.command1.click += new system.eventhandler(this.command1_click);
   this.load += new system.eventhandler(this.page_load);

  }
  #endregion

  private void command1_click(object sender, system.eventargs e)
  {
   string city = s_weather.selection.value.trim();
   int start,stop;
   string weather1,weather2,wea;
   string wea_city = weather_city(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;
   l_wea.text = "[天气]：" + weather1;
   l_sky.text = "[温度]：" + weather2;
   ///////
   l_date.text = wall[0];
   l_w1.text = wall[1];
   l_w2.text = wall[2];
   l_w3.text = wall[3];  
  }

  public string weather_city(string city)
  {
   string temp = null;
   try
   {
    string strurl = "http://weather.news.sina.com.cn/cgi-bin/figureweather/search.cgi";
    httpwebrequest request;
    request = (httpwebrequest)webrequest.create(strurl);
    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;
    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;
    response = (httpwebresponse)request.getresponse(); //获得响应流
    stream s;
    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("&lt;","<");
    html = html.replace("&gt;",">");
    int start,stop;
    start = html.indexof("<img src=/"http://image2.sina.com.cn/dy/weather/images/figure/",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;
  }
 }