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Asp. NET real-time weather and 24-hour weather forecast

Source: Internet
Author: User
Tags modify net readline string visual studio
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Modify the URL to get weather conditions in other cities

such as Guangzhou is:

Http://weather.yahoo.com/forecast/CHXX0037_c.html

Note only applies to get the weather forecast on Yahoo


The following are the referenced contents:
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= "Song Body" >
<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 hour weather </asp:Label></P>
<P>
<asp:button id= "BtnGet2" runat= "server" text= "Weather Forecast" ></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 the call are required by the ASP.net Web Form Designer.
//
InitializeComponent ();
Base. OnInit (e);
}

<summary>
Required to Designer support-do not modify
The contents is 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 ("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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