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. Net2.0 captures all links to a webpage)

Source: Internet
Author: User
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. Net2.0 captures all links to a web page

Author: qingyueer

Home page:Http://blog.csdn.net/21aspnet/Time: 2007.4.18

This method is tested on major portals with a capture rate of 100%!
BackgroundCode:

Using system;
Using system. Data;
Using system. configuration;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;
Using system. Web. UI. htmlcontrols;
Using system. Text. regularexpressions;
Using system. net;
Using system. IO;
Using system. collections;

Public partial class _ default: system. Web. UI. Page
{
Protected void page_load (Object sender, eventargs E)
{
If (! Ispostback)
{

}

}

Protected void button#click (Object sender, eventargs E)
{
Textbox2.text = "";
String web_url = This. textbox1.text; // "http://blog.csdn.net/21aspnet"
String all_code = "";
Httpwebrequest all_coderequest = (httpwebrequest) webrequest. Create (web_url );
 Webresponse all_coderesponse = all_coderequest.getresponse ();
Streamreader the_reader = new streamreader (all_coderesponse.getresponsestream ());
All_code = the_reader.readtoend ();
The_reader.close ();
Arraylist my_list = new arraylist ();
String P = @ "http: // ([\ W-] + \.) + [\ W-] + (/[\ W -./? % & =] *)? ";
RegEx Re = new RegEx (p, regexoptions. ignorecase );
Matchcollection MC = Re. Matches (all_code );

For (INT I = 0; I <= mc. Count-1; I ++)
{
Bool _ Foo = false;
String name = mc [I]. tostring ();
Foreach (string list in my_list)
{
If (name = List)
{
_ Foo = true;
Break;
}
} // Filter

If (! _ Foo)
{
Textbox2.text + = Name + "\ n ";
}
}
}
}

Front-end
<% @ Page Language = "C #" autoeventwireup = "true" codefile = "default. aspx. cs" inherits = "_ default" %>

<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<HTML xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> capture all links on a web page </title>

</Head>
<Body>
<Form ID = "form1" runat = "server">
<Div>
<Asp: textbox id = "textbox1" runat = "server" width = "481px"> </ASP: textbox>
<Asp: button id = "button1" runat = "server" onclick = "button#click" text = "extract"/>
<Br/>
<Asp: textbox id = "textbox2" runat = "server" Height = "304px" textmode = "multiline" width = "524px"> </ASP: textbox> </div>
</Form>
</Body>
</Html>

Comments:
Essence: String P = @ http: // ([\ W-] + \.) + [\ W-] + (/[\ W -./? % & =] *)?;

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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