return only Digits 0-9 from a String

Question

I need a regular expression that I can use in VBScript and .NET that will return only the numbers that are found in a string.

For Example any of the following \"str

Answer 1

The simplest solution, without a regular expression:

public string DigitsOnly(string s)
   {
     string res = "";
     for (int i = 0; i < s.Length; i++)
     {
       if (Char.IsDigit(s[i]))
        res += s[i];
     }
     return res;
   }