Reading Web Pages
/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson
Publisher: Apress L.P.
ISBN: 1-893115-62-3
*/
// 32 - .NET Frameworks Overview\Reading Web Pages
// copyright 2000 Eric Gunnerson
using System;
using System.Net;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
class QuoteFetch
{
public QuoteFetch(string symbol)
{
this.symbol = symbol;
}
public string Last
{
get
{
string url = "http://moneycentral.msn.com/scripts/webquote.dll?ipage=qd&Symbol=";
url += symbol;
ExtractQuote(ReadUrl(url));
return(last);
}
}
string ReadUrl(string url)
{
Uri uri = new Uri(url);
//Create the request object
WebRequest req = WebRequest.Create(uri);
WebResponse resp = req.GetResponse();
Stream stream = resp.GetResponseStream();
StreamReader sr = new StreamReader(stream);
string s = sr.ReadToEnd();
return(s);
}
void ExtractQuote(string s)
{
// Line like: "Last</TD><TD ALIGN=RIGHT NOWRAP><B> 78 3/16"
Regex lastmatch = new Regex(@"Last\D+(?<last>.+)<\/B>");
last = lastmatch.Match(s).Groups[1].ToString();
}
string symbol;
string last;
}
public class ReadingWebPages
{
public static void Main(string[] args)
{
if (args.Length != 1)
Console.WriteLine("Quote <symbol>");
else
{
// GlobalProxySelection.Select = new DefaultControlObject("proxy", 80);
QuoteFetch q = new QuoteFetch(args[0]);
Console.WriteLine("{0} = {1}", args[0], q.Last);
}
}
}
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