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ASP.NET的实时天气及24小时天气预报(C#)__教程

日期：2007-5-20 1:19:40 人气：49 [大中小]

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{

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;
}
}
}

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