Question

I have HTML data which I ll be using in a client app. I need to Regex.Replace the <a> tags from

<a href="Bahai.aspx">Bahai</a>

to

<a href="#" onclick="process( Bahai.aspx );return false;">Bahai</a>

In C# using RegExReplace with a regex similar to

<a[^>]*? href="(?<url>[^"]+)"[^>]*?>(?<text>.*?)</a>

Ideas?

Answer 1

In C# you could use code like this:

Regex.Replace("<a href="Bahai.aspx">Bahai</a>", 
            "<a href="(.+?)">(.+?)</a>", "<a href="#" onclick="process( $1 );return false;>$2</a>",
            RegexOptions.IgnoreCase);

It will return a string that matches what you require.

Answer 2

In general, it s best not to parse HTML with regular expressions. Try the Html Agility Pack instead.

Answer 3

If you insist on using javascript to get people to visit Bahai.aspx, then people without javascript won t get there. Could you use javascript to do the rewrite instead, for instance in jquery?

Let s say you tag the anchor tags with class="doProcess" then you could use the following jQuery script to change the links:

$(document).ready(function(){
  $( a.doProcess ).each(function(){
    var a = $(this);
    var href = a.attr( href );
    a.attr( href , # );
    a.click(function(){
      process(href);
      return false;
    });
  });
});

then both the users with javascript and without will get sent to Bahai (if that is what your process method does) :)

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