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;
  }
 }