Searching for numbers in a given string.

Question

1.00/5 (1 vote)

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I have a string which may contain numbers.I want to write function which searches for substring which contains numbers.

I am not able to search for numbers in string

Please provide me with any ideas which will help.

Posted 19-May-11 0:22am

bsb25

Updated 19-May-11 0:44am

Kim Togo

v3

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Comments

Rojeh 19-May-11 8:04am

what do you want to return??
the index of the substring(that contains numbers) in the string or a true\false value that tell you if the string contains the substring you are searching for??

5 solutions

Solution 1

You can use Regex.Replace() to do this.
e.g. Regex.Replace(myString, @"\d", string.empty);

Posted 19-May-11 0:27am

Abhinav S

Comments

bsb25 19-May-11 6:32am

i had changed the question.I want to search for it,not replace it.

Solution 2

try this also

string Result= StripNumbers("Fgadda734ddsg&^%^3284")
public string StripNumbers(string input)
        {
            Regex regEx = new Regex("[0-9]+");
            StringBuilder sb = new StringBuilder();
            foreach (char a in input)
            {
                if (!regEx.IsMatch(a.ToString()))
                {
                    sb.Append(a);
                }
            }

            return sb.ToString();
        }

Posted 19-May-11 0:34am

Mahendra.p25

Comments

bsb25 19-May-11 7:20am

not working :(

Solution 5

string searchWithinThis = "ABCDEF1GHIJKs12343LMNOP";
string searchForThis = "DEF1";
int firstCharacter = searchWithinThis.IndexOf(searchForThis);
Console.WriteLine("First occurrence: {0}", firstCharacter);

Posted 19-May-11 2:00am

Rojeh

v2

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Kim Togo · Accepted Answer · 2011-05-19T01:04:00

Try this bade boy of a regex string: \b(?=[-/\\\\A-Za-z]*[0-9])(?=[-/\\\\0-9]*[A-Za-z])[A-Za-z0-9]+(?:[-/\\\\][A-Za-z0-9]+)*\b

It will find only strings that contains numbers.

string like this "Dam It12 is not45 that g00d".

Will give you:

"It12"
"not45"
"g00d"

Example

C#

System.Text.RegularExpressions.MatchCollection ms = System.Text.RegularExpressions.Regex.Matches("Dam It12 is not45 that g00d", @"\b(?=[-/\\\\A-Za-z]*[0-9])(?=[-/\\\\0-9]*[A-Za-z])[A-Za-z0-9]+(?:[-/\\\\][A-Za-z0-9]+)*\b");

foreach (System.Text.RegularExpressions.Match m in ms)
{
  Console.WriteLine(m.ToString());
}

Deepthi Aravind · Accepted Answer · 2011-05-19T01:56:00

Solution 4

C#

  string abc = "deepthi12 "
char[] SpecialChars = "0123456789";.ToCharArray();
int indexOf = abc.IndexOfAny(SpecialChars);
if (indexOf != -1)
{
    //there should a number in the string
}
else
{
    //No number
}

Posted 19-May-11 1:56am

Deepthi Aravind

Comments

bsb25 19-May-11 11:04am

5 frm my side.

Searching for numbers in a given string.

5 solutions

Solution 3

Solution 4

Solution 1

Solution 2

Solution 5

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