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 be the best way to achieve this? Using regular expression to extract the text within the brackets and replacing this and any )( characters?

Answer 1

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 2

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 3

我只是提供了另一种方法来执行此操作，尽管我自己会使用正则表达式，因为这很笨拙：

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