.NET Regex question

I'm trying to parse some data out of a website. The problem is that a javascript generates the data, thus I can't use a HTML parser for it. The string inside the source looks like:

<a href="http:www.domain.compid.php?id=123">

Everything is constant except the id that comes after the =. I开发者_如何学Go don't know how many times the string will occur either. Would appreciate any help and an explanation on the regex example if possible.

---

Do you need to save any of it? A blanket regex href="[^"]+"> will match the entire string. If you need to save a specific part, let me know.

EDIT: To save the id, note the paren's after id= which signifies to capture it. Then to retrieve it, use the match object's Groups field.

string source = "a href=\"http:www.domain.compid.php?id=123\">";
Regex re = new Regex("href=\"[^\"]+id=([^\"]+)\">");

Match match = re.Match(source);
if(match.Success)
{
    Console.WriteLine("It's a match!\nI found:{0}", match.Groups[0].Value);
    Console.WriteLine("And the id is {0}", match.Groups[1].Value);
}

EDIT: example using MatchCollection

MatchCollection mc = re.Matches(source);

foreach(Match m in mc)
{
    //do the same as above. except use "m" instead of "match"
    //though you don't have to check for success in each m match object 
    //since it wouldn't have been added to the MatchCollection if it wasn't a match
}

---

This does the parsing in javascript and creates a csv-string:

var re = /<a href="http:www.domain.compid.php\?id=(\d+)">/;
var source = document.body.innerHTML;
var result = "result: ";

var match = re(source);
while (match != null) {
    result += match[1] + ",";
    source = source.substring(match.index + match[0].length);
    match = re(source);
}

Demo. If the html-content is not used for anything else on the server it should be sufficient to send the ids.

EDIT, For performance and reliability it's probably better to use builtin javascript-functions (or jQuery) to find the urls instead of searching the entire content:

var re = /www.domain.compid.php\?id=(\d+)/;
var as = document.getElementsByTagName('a');    
var result = "result: ";

for (var i = 0; i < as.length; i++) {
    var match = re(as[i].getAttribute('href'));
    if (match != null) {
        result += match[1] + ",";
    }
}