How to find and extract the numbers from string in Asp.net

Question

I am new to asp.net can you help me to find out how to find and extract the numbers from string in Asp.net.

can you please explain more with some example ? – SpiderCode Dec 09 '13 at 04:47 — SpiderCode, Dec 09 '13 at 04:47

score 0 · Answer 1 · edited Dec 09 '13 at 13:07

0

string output = new string(input.Where(char.IsDigit).ToArray());

edited Dec 09 '13 at 13:07

answered Dec 09 '13 at 04:47

Damith

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This way is very slow – Dec 09 '13 at 04:47
1

@ShahroozJefriㇱ depends on length of the string – Damith Dec 09 '13 at 04:50
Yes but regix is better – Dec 09 '13 at 04:50
3

A regex isn't free either. You won't notice a thing for both methods, you're too focused on premature optimization. – Jeroen Vannevel Dec 09 '13 at 04:54

score 0 · Answer 2 · answered Dec 09 '13 at 04:48

Method 1:

       String str = "udsdf34dfd78"; /*any string*/
       String strNumber = "";
       Regex regex=new Regex(@"\d");

       foreach (Match m in regex.Matches(str))
           strNumber += m.Value;

Method 2:

              String str = "udsdf34dfd78"; /*any string*/
              String strNumber = ""; 
              foreach (Char c in str)
               if (Char.IsDigit(c))
                   strNumber += c.ToString();

How to find and extract the numbers from string in Asp.net

2 Answers2