get an special Substring in c#

Question

I need to extract a substring from an existing string. This String starts with uninteresting characters (include "," "space" and numbers) and ends with ", 123," or ", 57," or something like this where the numbers can change. I only need the Numbers. Thanks

Where there are a few questions I have. Like Jerry Said what have you tried, also you included comma's inside the quotes, is that an always expected pattern, if so are your numbers always last after the last comma? If they are then just split by comma and take the last indice in the array. If this is not a typical then with out knowing a few more specifics about the expected format of the string I dont think there is much that can be done here minus the regex expressions. — Bearcat9425, May 29 '13 at 13:10

score 1 · Answer 1 · edited May 23 '17 at 11:57

1

Regex to match numbers: Regex regex = new Regex(@"\d+");

Source (slightly modified): Regex for numbers only

edited May 23 '17 at 11:57

Community

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answered May 29 '13 at 13:05

tnw

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@stema Slow morning. Thanks for the catches, changed `$` to `+` – tnw May 29 '13 at 13:10

score 1 · Accepted Answer · answered May 29 '13 at 13:14

public static void Main(string[] args)
{
    string input = "This is 2 much junk, 123,";
    var match = Regex.Match(input, @"(\d*),$");  // Ends with at least one digit 
                                                 // followed by comma, 
                                                 // grab the digits.
    if(match.Success)
        Console.WriteLine(match.Groups[1]);  // Prints '123'
}

score 0 · Answer 3 · edited May 29 '13 at 13:08

0

I think this is what you're looking for:

Remove all non numeric characters from a string using Regex

using System.Text.RegularExpressions;
...
string newString = Regex.Replace(oldString, "[^.0-9]", "");

(If you don't want to allow the decimal delimiter in the final result, remove the . from the regular expression above).

edited May 29 '13 at 13:08

Grant Winney

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answered May 29 '13 at 13:05

Annish

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While the link provided could offer or not the right answer, placing a link only answer is not considered a good answer, please elaborate. – Steve May 29 '13 at 13:08

Anirudha · Answer 4 · 2013-05-29T13:22:46.473

0

You can use \d+ to match all digits within a given string

So your code would be

var lst=Regex.Matches(inp,reg)
             .Cast<Match>()
             .Select(x=x.Value);

lst now contain all the numbers

But if your input would be same as provided in your question you don't need regex

input.Substring(input.LastIndexOf(", "),input.LastIndexOf(","));

edited May 29 '13 at 13:22

answered May 29 '13 at 13:06

Anirudha

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score 0 · Answer 5 · answered May 29 '13 at 13:08

0

Try something like this :

String numbers =  new String(yourString.TakeWhile(x => char.IsNumber(x)).ToArray());

answered May 29 '13 at 13:08

MHeads

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get an special Substring in c#

5 Answers5