ASP.net(c#)打造24小时天气预报及实时天气

时间：2021-05-28

本文详细介绍关于ASP.NET的实时天气及24小时天气预报
修改其中的url获得其他城市的天气情况的文章专题。


ASP.NET的实时天气及24小时天气预报(C#)
修改其中的url获得其他城市的天气情况
如广州为：
http://weather.yahoo.com
/forecast/CHXX0037_c.html
注意仅适用于获得yahoo上的天气预报
GetWeather.aspx
-----------------------------------

复制代码 代码如下:<%@Pagelanguage="c#"Codebehind="GetWeather.aspx.cs"AutoEventWireup="false"Inherits="test.GetWeather"%>
<!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.0Transitional//EN">
<HTML>
<HEAD>
<title>GetWeather</title>
<metaname="GENERATOR"Content="MicrosoftVisualStudio7.0">
<metaname="CODE_LANGUAGE"Content="C#">
<metaname="vs_defaultClientScript"content="JavaScript">
<metaname="vs_targetSchema"content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<formid="GetWeather"method="post"runat="server">
<FONTface="宋体">
<P>
<asp:Labelid="lblWeather"runat="server">Weather</asp:Label></P>
<P>
<asp:Buttonid="btnGet"runat="server"Text="GetWeather">
</asp:Button></P>
<P>
<asp:Labelid="Weather2"runat="server">24小时天气</asp:Label></P>
<P>
<asp:Buttonid="btnGet2"runat="server"Text="天气预报">
</asp:Button></P>
</FONT>
</form>
</body>
</HTML>
getWeather.aspx.cs
---------------------------------------

复制代码 代码如下:usingSystem;
usingSystem.Collections;
usingSystem.ComponentModel;
usingSystem.Data;
usingSystem.Drawing;
usingSystem.Web;
usingSystem.Web.SessionState;
usingSystem.Web.UI;
usingSystem.Web.UI.WebControls;
usingSystem.Web.UI.HtmlControls;
usingSystem.Net;
usingSystem.IO;

namespacetest
{

publicclassGetWeather:System.Web.UI.Page
{
protectedSystem.Web.UI.WebControls.LabellblWeather;
protectedSystem.Web.UI.WebControls.LabelWeather2;
protectedSystem.Web.UI.WebControls.ButtonbtnGet2;
protectedSystem.Web.UI.WebControls.ButtonbtnGet;

privatevoidPage_Load(objectsender,System.EventArgse)
{
//Putusercodetoinitializethepagehere
}

#regionWebFormDesignergeneratedcode
overrideprotectedvoidOnInit(EventArgse)
{
//
//CODEGEN:ThiscallisrequiredbytheASP.NETWebFormDesigner.
//
InitializeComponent();
base.OnInit(e);
}

///<summary>
///RequiredmethodforDesignersupport-donotmodify
///thecontentsofthismethodwiththecodeeditor.
///</summary>
privatevoidInitializeComponent()
{
this.btnGet.Click+=newSystem.EventHandler(this.btnGet_Click);
this.btnGet2.Click+=newSystem.EventHandler(this.btnGet2_Click);
this.Load+=newSystem.EventHandler(this.Page_Load);

}
#endregion

privatevoidbtnGet_Click(objectsender,System.EventArgse)
{

WebRequestwreq=WebRequest.Create
("http://weather.yahoo.com/forecast/CHXX0037_c.html");

HttpWebResponsewresp=(HttpWebResponse)wreq.GetResponse();

stringHTML="";
Streams=wresp.GetResponseStream();

StreamReaderobjReader=newStreamReader(s);

stringsLine="";
inti=0;

while(sLine!=null)
{
i++;
sLine=objReader.ReadLine();
if(sLine!=null)
HTML+=sLine;
}

Stringtemp="";
intstart,stop;

start=HTML.IndexOf("<!--CURCON-->",0,HTML.Length);

stop=HTML.IndexOf("<!--ENDCURCON-->",0,HTML.Length);

temp=HTML.Substring(start,stop-start);
start=temp.IndexOf("<b>");
stop=temp.IndexOf("</b>");

stringdegree=temp.Substring(start+3,stop-start-3);

start=temp.IndexOf("<img");
stop=temp.IndexOf("</td>",start);

stringimg=temp.Substring(start,stop-start);
lblWeather.Text=degree+"<br>"+img;

}

privatevoidbtnGet2_Click(objectsender,System.EventArgse)
{
WebRequestwreq=WebRequest.Create
("http://cn.weather.yahoo.com/CHXX/CHXX0037/index_c.html");

HttpWebResponsewresp=(HttpWebResponse)wreq.GetResponse();

stringHTML="";
Streams=wresp.GetResponseStream();

StreamReaderobjReader=newStreamReader(s,System.Text.Encoding.GetEncoding("GB2312"));


stringsLine="";
inti=0;

while(sLine!=null)
{
i++;
sLine=objReader.ReadLine();
if(sLine!=null)
HTML+=sLine;
}

Stringtemp="";
intstart,stop;

start=HTML.IndexOf("<tableborder=0cellpadding=2
cellspacing=1bgcolor=9999ccwidth=\"85%\">",0,HTML.Length);

stop=HTML.IndexOf("</table>",start)+8;


temp=HTML.Substring(start,stop-start);
Weather2.Text=temp;
}
}
}请注明转自chinazhan中国站长

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