How to check if a char in a char array

Question

C# problem. I have an array

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

foreach (char c in s)
{
    //how to check if c is in x, a valid char. ????
}

Thanks.

Answer 1

You could use Array.IndexOf method:

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

Answer 2

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

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

Answer 3

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

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

Kindness,

Dan

Answer 4

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