Remove numbers in specific part of string (within parentheses)

Question

I have a string Test123(45) and I want to remove the numbers within the parenthesis. How would I go about doing that?

So far I have tried the following:

string str = "Test123(45)";
string result = Regex.Replace(str, "(\\d)", string.Empty);

This however leads to the result Test() , when it should be Test123() .

Answer 1

tis replaces all parenthesis, filled with digits by parenthesis

string str = "Test123(45)";
string result = Regex.Replace(str, @"\(\d+\)", "()");

Answer 2

\d+(?=[^(]*\))

Try this.Use with verbatinum mode @ .The lookahead will make sure number have ) without ( before it.Replace by empty string .

See demo.

https://regex101.com/r/uE3cC4/4

Answer 3

string str = "Test123(45)";
string result = Regex.Replace(str, @"\(\d+\)", "()");

Answer 4

you can also try this way:

 string str = "Test123(45)";
        string[] delimiters ={@"("};;
        string[] split = str.Split(delimiters, StringSplitOptions.None);
        var b=split[0]+"()";

Answer 5

Remove a number that is in fact inside parentheses BUT not the parentheses and keep anything else inside them that is not a number with C# Regex.Replace means matching all parenthetical substrings with \\([^()]+\\) and then removing all digits inside the MatchEvaluator .

Here is a C# sample program :

var str = "Test123(45) and More (5 numbers inside parentheses 123)";
var result = Regex.Replace(str, @"\([^()]+\)", m => Regex.Replace(m.Value, @"\d+", string.Empty));
// => Test123() and More ( numbers inside parentheses )

To remove digits that are enclosed in ( and ) symbols, the ASh's \\(\\d+\\) solution will work well: \\( matches a literal ( , \\d+ matches 1+ digits, \\) matches a literal ) .