How to check if comma separated string contains only numbers?

Question

I want to pass input as numbers separated by a comma (,) in a method which return true or false. The method DoesInputContainsNumbers should return true if all are numbers and return false if any of them are non numbers. For example, the input "20, 10, 30, 40" return true while the input "10, 20,aaa" return false. Is there a better way to achieve this than the below I tried?

public static bool DoesInputContainsNumbers(string input)
{
    if (string.IsNullOrWhiteSpace(input))
    {
        return false;
    }
    try
    {
        input.Split(",").Select(x => int.Parse(x)).ToList();
    }
    catch (Exception ex)
    {
        return false;
    }
    return true;
}

Does this answer your question? [Identify if a string is a number](https://stackoverflow.com/questions/894263/identify-if-a-string-is-a-number) — Progman, Jul 30 '22 at 08:45

score 9 · Accepted Answer · answered Jul 30 '22 at 08:46

Yes - rather than catching an exception, use int.TryParse, which already return a bool. You can then simplify it to:

public static bool DoesInputContainsNumbers(string input) =>
    !string.IsNullOrWhiteSpace(input) &&
    input.Split(',').All(x => int.TryParse(x, out _));

Technorg · Answer 2 · 2022-07-30T09:06:10.350

2

Follow below code ,it will solve your issue.

public static bool DoesInputContainsNumbers(string input){
    !string.IsNullOrWhiteSpace(input) && 
    !str.Split(',').Any(x=>{ int val;return !int.TryParse(x,out val); });
    }

edited Jul 30 '22 at 09:06

answered Jul 30 '22 at 08:58

Technorg

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How to check if comma separated string contains only numbers?

2 Answers2