【用C#讀取sina天氣預報到wap頁面】

頁面代碼：

＜%@ Register TagPrefix="mobile" Namespace="System.Web.UI.MobileControls" Assembly="System.Web.Mobile" %＞＜%@ Page language="c#" Codebehind="weather.aspx.cs" Inherits="goodwap.life.weather" AutoEventWireup="false" %＞＜mobile:form id="Form1" runat="server"＞
＜FONT face="宋體"＞
＜mobile:Label id="Label3" runat="server" Font-Bold="True"＞【生活資訊】＜/mobile:Label＞
＜mobile:Label id="Label1" runat="server" Font-Italic="True"＞==天氣預報==＜/mobile:Label＞
＜mobile:Label id="l_date" runat="server"＞＜/mobile:Label＞
＜mobile:Label id="l_city" runat="server"＞＜/mobile:Label＞
＜mobile:Label id="l_wea" runat="server"＞＜/mobile:Label＞
＜mobile:Label id="l_sky" runat="server"＞＜/mobile:Label＞
＜mobile:Label id="l_w1" runat="server"＞＜/mobile:Label＞
＜mobile:Label id="l_w2" runat="server"＞＜/mobile:Label＞
＜mobile:Label id="l_w3" runat="server"＞＜/mobile:Label＞
＜mobile:Label id="Label2" runat="server"＞【請選擇城市名】：＜/mobile:Label＞
＜mobile:SelectionList id="s_weather" runat="server"＞
＜Item Value="深圳" Text="深圳" Selected="True"＞＜/Item＞
＜Item Value="廣州" Text="廣州"＞＜/Item＞
＜Item Value="上海" Text="上海"＞＜/Item＞
＜Item Value="北京" Text="北京"＞＜/Item＞
＜Item Value="天津" Text="天津"＞＜/Item＞
＜Item Value="武漢" Text="武漢"＞＜/Item＞
＜Item Value="重慶" Text="重慶"＞＜/Item＞
＜Item Value="成都" Text="成都"＞＜/Item＞
＜Item Value="南京" Text="南京"＞＜/Item＞
＜Item Value="香港" Text="香港"＞＜/Item＞
＜Item Value="澳門" Text="澳門"＞＜/Item＞
＜/mobile:SelectionList＞
＜mobile:Command id="Command1" runat="server"＞查詢＜/mobile:Command＞
＜mobile:Link id="Link1" runat="server" NavigateUrl="../default.aspx#Goodview"＞首頁＜/mobile:Link＞＜/FONT＞＜/mobile:form＞

後臺代碼：

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)
  {
   // 在此處放置用戶代碼以初始化頁面
   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("",0,wea_city.Length);
 stop = wea_city.IndexOf("", 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>", 0, wea_city.Length);
 stop = wea_city.IndexOf("",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 = "[天氣]：" + weather1;
    l_sky.Text = "[溫度]：" + weather2;
    ///////
    l_date.Text = wall[0];
    l_w1.Text = wall[1];
    l_w2.Text = wall[2];
    l_w3.Text = wall[3];
   }
  }

  #region Web 窗體設計器生成的代碼
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 該調用是 ASP.NET Web 窗體設計器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }

/// <summary>
 /// 設計器支持所需的方法 - 不要使用代碼編輯器修改
 /// 此方法的內容。
 /// </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("",0,wea_city.Length);
 stop = wea_city.IndexOf("", 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>", 0, wea_city.Length);
 stop = wea_city.IndexOf("",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 = "[天氣]：" + weather1;
   l_sky.Text = "[溫度]：" + 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";

//string strURL = "http://php.weather.sina.com.cn/search.php?city="+city+"";
 HttpWebRequest request;
 request = (HttpWebRequest)WebRequest.Create(strURL);
 request.Method="POST"; //Post請求方式
 request.ContentType="application/x-www-form-urlencoded"; //內容類型
 string paraUrlCoded = System.Web.HttpUtility.UrlEncode("city"); //參數經過URL編碼
 paraUrlCoded = paraUrlCoded + "=" + System.Web.HttpUtility.UrlEncode(city, System.Text.Encoding.GetEncoding("GB2312"));
 byte[] payload;
 payload = System.Text.Encoding.GetEncoding("GB2312").GetBytes(paraUrlCoded); //將URL編碼後的字符串轉化爲字節
 request.ContentLength = payload.Length; //設置請求的ContentLength
 Stream writer = request.GetRequestStream(); //獲得請求流
 writer.Write(payload,0,payload.Length); //將請求參數寫入流
 writer.Close(); //關閉請求流
 HttpWebResponse response;
 response = (HttpWebResponse)request.GetResponse(); //獲得響應流
 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("<","<");
 HTML = HTML.Replace(">",">");
 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;
 }
}

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