How to check if there is a number and the letter X in a textbox in c#

Question

I'm using C# and winforms. So I'm trying to build a POS app that has a textbox for barcodes and commands. One of the commands is "t" for total.

I want to implement another command that has a number and the letter "x" after it, for the quantity of the next item scanned or entered. Basically I want to make it so that if you put in "2x" into the textbox, it sets a variable to 2. Is there any easy way to that for any integer number. Like if(txtbarcode.text == int + "x") (I know this code doesn't work but it's here as an example)

Any help would be greatly appreciated, Thanks. EB.

Answer 1

Seems using regular expression can help in this case

Here is the snippet

using System;
using System.Text.RegularExpressions;
                    
public class Program
{
    public static void Main()
    {
        var pattern = @"^(-?\d+\.?\d*)x$"; // support negatives and decimal
        var match = Regex.Match("123.31x", pattern);
        
        if(match.Success) {
            Console.WriteLine(match.Groups[1]); //return numbers only
        }
    }
}

supported cases

123x
-1x
123.31x