How to check if a particular character exists within a character array

Question

I am using an array within a C# program as follows:

char[] x = {'0','1','2'};
string s = "010120301";

foreach (char c in s)
{
    // check if c can be found within s
}

How do I check each char c to see if it is found within the character array x?

User1000547 · Accepted Answer · 2022-02-15 17:44:36Z

41

if (x.Contains(c))
{
 //// Do Something
}

Using .NET 3.0/3.5; you will need a using System.Linq;

edited Feb 15, 2022 at 17:44

User1000547

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answered Nov 30, 2009 at 9:02

Daniel Elliott

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1 Comment

Hi-Angel Over a year ago

Doesn't work with bytes, the answer with Array.IndexOf ↓ does work.

Darin Dimitrov · Accepted Answer · 2009-11-30 09:00:22Z

22

You could use Array.IndexOf method:

if (Array.IndexOf(x, c) > -1)
{
    // The x array contains the character c
}

answered Nov 30, 2009 at 9:00

Darin Dimitrov

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Comments

Konamiman · Accepted Answer · 2009-11-30 09:00:59Z

10

If I understood correctly, you need to check if c is in x. Then:

if(x.Contains(c)) { ... }

answered Nov 30, 2009 at 9:00

Konamiman

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Comments

serhio · Accepted Answer · 2009-11-30 11:32:08Z

1

string input = "A_123000544654654"; 
string pattern = "[0-9]+";
System.Text.RegularExpressions.Regex.IsMatch(input, pattern);

edited Nov 30, 2009 at 11:32

answered Nov 30, 2009 at 9:27

serhio

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