search for links in a web browser control

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i have a small problem, how do i find all links from a webpage navigated in a web browser control starting with : "http://devvicky.com/page0/".

eg : in a form i have a control which navigates to devvicky.com/page0. This page has some links starting with above string but randomly distributed over the page.

WebBrowser1.Document.Links lists all the links of a webpage but how to proceed in my case??

Posted 17-Jul-10 23:05pm

amit_upadhyay

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3 solutions

Solution 1

There are quite a few ways to get the links.
You might use a Regular expression to search in DocumentText.

You can loop through all the controls using Document.Forms and get only the anchor tag.

You can use GetElementById to do the same.

Either way you can enumerate the links in your document.

Posted 18-Jul-10 6:16am

Abhishek Sur

Comments

amit_upadhyay 18-Jul-10 12:19pm

i can get all the links but how to find the ones starting with a particular pattern?? it is more of a string problem. Find a substring starting with given pattern

Andrei Scripniciuc 18-Jul-10 12:24pm

Reason for my vote of 4
Lists a lot of good solutions but no sample code.

Solution 2

For checking which strings start with a particular substring just use:

if(myString.StartsWith(mySubstring)
{
    //do something
}

Posted 18-Jul-10 6:23am

Andrei Scripniciuc

Comments

amit_upadhyay 18-Jul-10 12:27pm

can you modify it a little to get this :
suppose i know "http://devvicky.com" from "http:/my.devvicky.com" (i dont know "my."), then how can i get the unknown part, i suppose you remove first string from second but how?

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Andrei Scripniciuc · Accepted Answer · 2010-07-18T06:45:00

This is where you can start using regular expressions.
You can try something like this:

string mySearchPattern = @"$http://(\w+\.?)thedomain\.com^";
if(Regex.IsMatch(inputString, mySearchPattern))
{
    //do something
}

What this regex (i hope) tells the regex engine is:
Does the input string start with http://, optionally contains one or more word characters followed by a dot and ends in thedomain.com?
I'm saying i hope this is what it does because i don't have a lot of experience with regular expressions.
But even if this is not an exact solution, if you manage to tame even the basic capabilities of regular expressions, you'll never look back at string searches and replacements.
Try this link for a complete overview of using regular expressions:
www.regular-expressions.info.

Hope this helps,
Andrei