CODEWITHSUNDEEP
c#
Nikki Munoz
Nikki Munoz

Reputation: 23

Erase all numbers after a underscore

I have this code which should erase all the numbers after a certain _

var fileNameOnly1 = Regex.Replace(fileNameOnly, @"[_\d]", string.Empty);

I.e.

Input

4a_32
abcdef43252_43242

Current Output 

4a2
abcdef432523242

Expected output 

4a
abcdef43252

I also tried using @"[_\d]"

is there any way to erase numbers after _ and erase the '_' also ??

Upvotes: 1

Views: 53

Answers (3)

NO TO OPENAI
NO TO OPENAI

Reputation: 685

You dont specifically mention that you need to use regex and in most cases I would advise against it as regex is rather slow (comparison to other methods) and cumbersome (difficult to read and write).

I would think that it would be better to do this using string manipulation instead.

var fileNameOnly1 = fileNameOnly.Split('_')[0];

The above code will find the first '_' and take all characters before it (returned as a string).

Upvotes: 2

Kirill Polishchuk
Kirill Polishchuk

Reputation: 56202

Simply use this regex: _\d+

Regex.Replace(fileNameOnly, @"_\d+", string.Empty);

Upvotes: 0

TheGeneral
TheGeneral

Reputation: 81563

Try this

Pattern

_\d+

Example

var fileNameOnly = "asdads_234asd";
var result = Regex.Replace(fileNameOnly, @"_\d+", string.Empty);
Console.WriteLine(result);

Output

asdadsasd

Upvotes: 0

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