ASP.NET的實時天氣及24小時天氣預報_.Net教程
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修改其中的url獲得其他城市的天氣情況
如廣州為：
http://weather.yahoo.com/forecast/CHXX0037_c.html
注意僅適用于獲得yahoo上的天氣預報
| 以下為引用的內容： GetWeather.aspx ----------------------------------- <%@ Page language="c#" Codebehind="GetWeather.aspx.cs" AutoEventWireup="false" Inherits="test.GetWeather" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <HTML> <HEAD> <title>GetWeather</title> <meta name="GENERATOR" Content="Microsoft Visual Studio 7.0"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body> <form id="GetWeather" method="post" runat="server"> <FONT face="宋體"> <P> <asp:Label id="lblWeather" runat="server">Weather</asp:Label></P> <P> <asp:Button id="btnGet" runat="server" Text="Get Weather"></asp:Button></P> <P> <asp:Label id="Weather2" runat="server">24小時天氣</asp:Label></P> <P> <asp:Button id="btnGet2" runat="server" Text="天氣預報"></asp:Button></P> </FONT> </form> </body> </HTML> getWeather.aspx.cs --------------------------------------- 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 test { public class GetWeather : System.Web.UI.Page { protected System.Web.UI.WebControls.Label lblWeather; protected System.Web.UI.WebControls.Label Weather2; protected System.Web.UI.WebControls.Button btnGet2; protected System.Web.UI.WebControls.Button btnGet; private void Page_Load(object sender, System.EventArgs e) { // Put user code to initialize the page here } #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.btnGet.Click = new System.EventHandler(this.btnGet_Click); this.btnGet2.Click = new System.EventHandler(this.btnGet2_Click); this.Load = new System.EventHandler(this.Page_Load); } #endregion private void btnGet_Click(object sender, System.EventArgs e) { WebRequest wreq=WebRequest.Create("http://weather.yahoo.com/forecast/CHXX0037_c.html"); HttpWebResponse wresp=(HttpWebResponse)wreq.GetResponse(); string HTML =""; Stream s=wresp.GetResponseStream(); StreamReader objReader = new StreamReader(s); string sLine = ""; int i = 0; while (sLine!=null) { i ; sLine = objReader.ReadLine(); if (sLine!=null) HTML = sLine; } String temp= ""; int start,stop; start = HTML.IndexOf("<!-- CURCON-->",0,HTML.Length); stop = HTML.IndexOf("<!-- END CURCON-->",0,HTML.Length); temp = HTML.Substring(start, stop - start); start = temp.IndexOf("<b>"); stop = temp.IndexOf("</b>"); string degree = temp.Substring(start 3,stop - start -3); start = temp.IndexOf("<img"); stop = temp.IndexOf("</td>",start); string img = temp.Substring(start,stop - start); lblWeather.Text = degree "<br>" img; } private void btnGet2_Click(object sender, System.EventArgs e) { WebRequest wreq=WebRequest.Create("http://cn.weather.yahoo.com/CHXX/CHXX0037/index_c.html"); HttpWebResponse wresp=(HttpWebResponse)wreq.GetResponse(); string HTML =""; Stream s=wresp.GetResponseStream(); StreamReader objReader = new StreamReader(s,System.Text.Encoding.GetEncoding("GB2312")); string sLine = ""; int i = 0; while (sLine!=null) { i ; sLine = objReader.ReadLine(); if (sLine!=null) HTML = sLine; } String temp= ""; int start,stop; start = HTML.IndexOf("<table border=0 cellpadding=2 cellspacing=1 bgcolor=9999cc width=\"85%\">",0,HTML.Length); stop = HTML.IndexOf("</table>",start) 8; temp = HTML.Substring(start, stop - start); Weather2.Text = temp; } } } |
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