How to remove text in brackets using a regular expression

Question

I\'m looking for a regular expression which will perform the following:

INPUT: User Name (email@address.com)
OUTPUT: User Name

What would b

Answer 1

Did you mean you want the user name output, rather than the email address? For either case, you don't need regexes. For example, assuming the input is always well-formed and hence leaving out any error checking,

string output = input.Substring(0, input.IndexOf(" ("))

will get you the user name. And if you did want the email address, that too is available without resorting to regexes:

int n;
string output = input.Substring(n = 1 + input.IndexOf('('),
                                input.IndexOf(')') - n)

Answer 2

This should do the job:

var input = "User Name (email@address.com)";
var output = Regex.Replace(input, @" ?\(.*?\)", string.Empty);

Note the escaping of the ( and ) chars so that they aren't recognised as group markers.

Answer 3

I'm just offering another way to do this, although I would just use regex myself as this is clunky:

    string output = input.Split('(')[0].TrimEnd();