c# regex match var value

Question

I want to match var value between quotes. here's input:

bunch of other text, html tags, css var SECURITYTOKEN = "1354010802-f407561a1503fa33e8e316f058c0f0598ce5adad"; bunch of other text, html tags, css

result should be 1354010802-f407561a1503fa33e8e316f058c0f0598ce5adad

i was trying something like this: Match m = Regex.Match(input, @"var\sSECURITYTOKEN\s="); but im totally confused.

A good resource for testing .Net regex patterns online : derekslager.com/blog/posts/2007/09/… — hoang
– hoang, Commented Nov 27, 2012 at 12:38

Dmitrii Dovgopolyi · Accepted Answer · 2012-11-27 11:30:14Z

Your variant finds only the part var SECURITYTOKEN =

use positive lookahead (?=...) and positive lookbehind (?<=...)

String regexPattern = "(?<=var SECURITYTOKEN = \")(.*?)(?=\")"; Match m = Regex.Match(input, regexPattern);

og Grand · Accepted Answer · 2012-11-27 11:25:08Z

Try this regex (?<=")(.*?)(?=")

So it will be something like this

var regexPattern = "(?<=\")(.*?)(?=\")"; Match m = Regex.Match(input, regexPattern);

hoang · Accepted Answer · 2012-11-27 12:35:21Z

This is pretty much the same as og Grand answer but if your input looks like

var foo = "bar"; var SECURITYTOKEN = "1354010802-f407561a1503fa33e8e316f058c0f0598ce5adad"; var tata = "titi";

the following will be better :

var regexPattern = "(?<=var SECURITYTOKEN\s*=\s*\")(.*?)(?=\";)"; Match m = Regex.Match(input, regexPattern);

3 Answers 3