Question

I will have a different type of string(string will not have fixed format,they will be different every time) from them I want to remove some specific substring.Like the string can be

OPTIDX 26FEB2009 NIFTY CE 2500
OPTIDX NIFTY 30 Jul 2009 4600.00 PE
OPTSTK ICICIBANK 30 Jul 2009 700.00 PA

I want to extract Rs.(digit) from those string and store it into one variable and then in those string there should not be Rs.(digit).

What should be the regex for that ?

EDIT

private string ExtractingRupeesFromString(String str)
{
    Match match = Regex.Match(cellRecord, @"(\d+(?:\.\d+)?)\D*$");
    return match.Value.ToString();
}

for(int i=0;i<datagridview1.Rows.Count;i++)
{
    datagridview1["Rs",i].Value=ExtractingRupeesFromString(datagridview1["ScriptName",i].Value.ToString());
}

Answer 1

If you wan’t to extract only [‘2500’, ‘4600.00’, ‘700.00’], you could use following regex with MULTILINE flag enabled

@"([+-]?\d+(?:\.\d+)?)\D*$"

Edit: Added optional [+-], and some C# codes

string s = @"
OPTIDX 26FEB2009 NIFTY CE 2500
OPTIDX NIFTY 30 Jul 2009 4600.00 PE
OPTSTK ICICIBANK 30 Jul 2009 700.00 PA
";
Regex re = new Regex(@"([+-]?\d+(?:\.\d+)?)\D*$",RegexOptions.Multiline);
foreach (Match a in re.Matches(s)){
    System.Console.WriteLine(a.Groups[1]);
}

//2500
//4600.00
//700.00

Edit:

You could change

return match.Value.ToString();

to

return match.Groups[1].ToString();

to return only number part.