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How to find the third element value using Regex

All, i am currently trying to parse each element that has the format below using regex and c# to find any value in () below.. Example i would like to extract 2002_max_allow_date .. note not all the names in here will be alpha numeric etc...
I initially have the pattern: Regex regex = new Regex(#"(\w\d\d\d.[A-Z])\w+");
However this only returns the name with the numeric etc
From reply i tried the following and trying to format this so that i do not get the syntax error as well as i don't want to change the regex query...
Can someone please assist me in finding the name located in the third position.. example this,'46032','46032','2002_MAX_ALLOW_DATE'
<button class="longlist-cb longlist-cb-yes" id="cb46032"
onclick="$ll.CATG.toggleCb(this,'46032','46032','2002_MAX_ALLOW_DATE')"
</button>

Please try this
Regex rex = new Regex("'[^']+','[^']+','(?<ThirdElement>[^']+)'");
String data = "'46032','46032','2002_MAX_ALLOW_DATE'";
Match match = rex.Match(data);
Console.WriteLine(match.Groups["ThirdElement"]); // Output: 2002_MAX_ALLOW_DATE

SECOND EDIT:
I've written some code that provides all the elements inside the onclick as capture groups:
Regex regex = new Regex("onclick=\"\\$ll.CATG.toggleCb\\((.*),\\s?(.*),\\s?(.*),\\s?(.*)\\)");
string x = "<button class=\"longlist - cb longlist - cb - yes\" id=\"cb46032\" onclick=\"$ll.CATG.toggleCb(this, '46032', '46032', '2002_MAX_ALLOW_DATE')\"></button>";
Match match = regex.Match(x);
if (match.Success)
{
Console.WriteLine("match.Value returns: " + match.Value);
foreach (Group y in match.Groups)
{
Console.WriteLine("the current capture group: " + y.Value);
}
}
else
{
Console.Write("No match");
}
Console.ReadKey();
will print:
EDIT: After trying with VS, this worked for me: Regex regex = new Regex("onclick=\"\\$ll.CATG.toggleCb\\((.*),.*,.*,.*\\)");
ORIGINAL ANSWER:
If you were to use Regex regex = new Regex(#"onclick="\$ll.CATG.toggleCb\(.*,.*,(.*),.*\)"); on your provided text, that should return '46032'.
You could alter this regex by moving the capturing ( and ) to a different .* to capture, say, the fourth element, like this: onclick="\$ll.CATG.toggleCb\((.*),.*,.*,.*\) would capture this.

Why not get the attribute value of onclick, but to get the all HTML of the button which make question become complex.
And use String.Split can resolve your problem simply, but you choose to use RegExp.
the_button_element.GetAttribute('onclick').Split(',')[3]
Or use RegExp:
new Regex(#".*?,'(\w+)'\)$")

Regex to extract data from card swipe

I'm searching for a regular expression that will extract 0263563
from
;010263563=2119?
and 0267829
from
%00000026782904?;010267829=4119?
(Must be the same regular expression).

Start at the 3rd character after the semicolon and take 7 characters.
;..(\d{7})
or more general:
;..(.{7})
Or according to comment : "To clarify characters to take are digits"
;\d\d(\d{7})

Well, you need this:
;\d{2}(\d+)
The First group will contain the number you want.

;[\S]{2}([\S]{7})
Since you said characters and not numbers, but it would work either way

For rules that are that precise (start 3 chars after ;, then next 7), you could use a plain substring:
string s = "%00000026782904?;010267829=4119?";
var pos = s.IndexOf(';');
var number = s.Substring(pos+3, 7);
And of course, test whether that IndexOf really found the ;

The below regex would exactly 7 digits which must be preceded by a ; , any two characters.
(?<=;.{2})\d{7}
Code:
String input = #";010263563=2119?
%00000026782904?;010267829=4119?";
Regex rgx = new Regex(#"(?<=;.{2})\d{7}");
foreach (Match m in rgx.Matches(input))
Console.WriteLine(m.Groups[0].Value);
IDEONE
Output:
0263563
0267829

Assuming regex is not an absolute requirement, you could use:
var input = "%00000026782904?;010267829=4119?";
// output will be: 0267829
var digits = input.SkipWhile(x => x != ';').Skip(3).Take(7).ToArray();
var output = new string(digits);

regex problem C#

const string strRegex = #"(?<city_country>.+) ?(bis|zu)? (?<price>[\d.,]+) eur";
searchQuery = RemoveSpacesFromString(searchQuery);
Regex regex = new Regex(strRegex, RegexOptions.IgnoreCase);
Match m = regex.Match(searchQuery);
ComplexAdvertismentsQuery query = new ComplexAdvertismentsQuery();
if (m.Success)
{
query.CountryName = m.Groups["city_country"].Value;
query.CityOrAreaName = m.Groups["city_country"].Value;
query.PriceFrom = Convert.ToDecimal(1);
query.PriceTo = Convert.ToDecimal(m.Groups["price"].Value);
}
else
return null;
return query;
my search string is "Agadir ca. 600 eur" but "ca." is not "bis" or "zu" and regex is also true. What is wrong with regex? I want that regex is true only if is word "bis" or "zu".
I think this is worng
?(bis|zu)?

Agadir ca. becomes your city_country and (bis|zu)?part is skipped as you've marked it as not required with ?.

It looks like it's because you made bis and zu optional. Try changing (bis|zu)? to (bis|zu)

Remove the question mark in (bis|zu)?. As it is right now, the .+ of <city_country> matches up to the prices and includes ca..
In fact, you might want to change the whole ?(bis|zu)? part to ( bis| zu).

(?<city_country>.+) ?(bis|zu)? (?<price>[\d.,]+) eur
^ ^
1 2
The first ? belongs to the space before
The second ? belongs to the (bis|zu)
The ? in these two cases makes the expression before optional

Find number in string

How to find number(int, float) in a string (fast method)?
For example: "Question 1" and "Question 2.1".
I need that in variable would be only number.
Thanks.

you can use this ([0-9]\.*)*[0-9] regex to get it. you can test any regex here
Edit
this sample code in C#
Regex regexpattern = new Regex(#"(([0-9]\.*)*[0-9])");
String test = #"Question 1 and Question 2.1.3";
foreach (Match match in regexpattern.Matches(test))
{
String language = match.Groups[1].Value;
}

You can use Reqular Expressions. To search numbers try this:
var r = System.Text.RegularExpressions.Regex.Match("Question 2.1", "\d+");

There's always the good ol' regular expressions! It wouldn't give you a float for "2.1" though, but I'm not sure that's a good idea since there's always the possibility of "2.1.4" or even "2a". Might be best to store a vector of numbers for each item.

Use this regex: \d+(?:\.\d+)?.

C# Regular Expression to return only the numbers

Let's say I have the following within my source code, and I want to return only the numbers within the string:
The source is coming from a website, just fyi, and I already have it parsed out so that it comes into the program, but then I need to actually parse these numbers to return what I want. Just having a doosy of a time trying to figure it out tho :(
like: 13|100|0;
How could I write this regex?
var cData = new Array(
"g;13|g;100|g;0",
"g;40|g;100|g;1.37",
"h;43|h;100|h;0",
"h;27|h;100|h;0",
"i;34|i;100|i;0",
"i;39|i;100|i;0",
);

Not sure you actually need regex here.
var str = "g;13|g;100|g;0";
str = str.Replace("g;", "");
would give you "13|100|0".
Or a slight improvement on spinon's answer:
// \- included in case numbers can be negative. Leave it out if not.
Regex.Replace("g;13|g;100|g;0", "[^0-9\|\.\-]", "");
Or an option using split and join:
String.Join("|", "g;13|g;100|g;0".Split('|').Select(pipe => pipe.Split(';')[1]));

I would use something like this so you only keep numbers and separator:
Regex.Replace("g;13|g;100|g;0", "[^0-9|]", "");

Regex might be overkill in this case. Given the uniform delimiting of | and ; I would recommend String.Split(). Then you could either split again or use String.Replace() to get rid of the extra chars (i.e. g;).

It looks like you have a number of solutions, but I'll throw in one more where you can iterate over each group in a match to get the number out if you want.
Regex regexObj = new Regex(#"\w;([\d|.]+)\|?");
Match matchResults = regexObj.Match("g;13|g;100|g;0");
if( matchResults.IsMatch )
{
for (int i = 1; i < matchResults.Groups.Count; i++)
{
Group groupObj = matchResults.Groups[i];
if (groupObj.Success)
{
//groupObj.Value will be the number you want
}
}
}
I hope this is helps.