ASP.NET的即時天氣及24小時天氣預報

最後更新：2017-02-28 來源：互聯網

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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

注意僅適用於獲得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("",0,HTML.Length);

   stop = HTML.IndexOf("",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;
   }
   }
}

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

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