c# - how to get numbers from a string and store it in a variable in c#

Question

I have a value like this ab48/2012. How to extract the numbers from this string? I need to store 48 in one variable and 2012 in another variable.

Is it possible to extract numbers without using the substring function? If it is possible, please help me.

I have tried like this

string Value = "ab48/2012";
string[] array = value.Split('/');
int Value1 = Convert.ToInt32(array[0].Substring(2));
int Value2 = Convert.ToInt32(array[1].ToString());

Answer 1

How about this?

int[] numbers = Regex.Split(Value, @"\D+")
                .Where(x => x.Length > 0)
                .Select(int.Parse)
                .ToArray();

NOTE: This does NOT handle negative numbers or numbers with decimal places.

Answer 2

string[] parts = "abc48/2012".Split('/');
int value1 = Int32.Parse(new String(parts[0].Where(Char.IsDigit).ToArray()));
int value2 = Int32.Parse(parts[1]);

If you find yourself using this sort of code a lot you could introduce a utility extension method e.g.

public static string GetIntegersOnly(this string str)
{
    return new String(str.Where(Char.IsDigit).ToArray());
}
...
int value1 = Int32.Parse(parts[0].GetIntegersOnly())

Answer 3

var input = "ab48/2012";
var regex = new Regex(@"^[^\d]*(?<a>\d*?)/(?<b>\d*)$");
var m = regex.Match(input);
if(m.Success)
{
    var a = m.Groups["a"].Value;
    var b = m.Groups["b"].Value;
    var aVal = int.Parse(a);
    var bVal = int.Parse(b);
}

Answer 4

You can use Regular Expression

var result = System.Text.RegularExpressions.Regex.Matches("abc48/2012", "[0-9]+", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            foreach(var val in result){
                var temp_variable = val;
            }

Answer 5

Perhaps:

string[] tokens = "ab48/2012".Split('/');
int num = int.Parse(new string(tokens.First().Where(Char.IsDigit).ToArray()));
int year = int.Parse(tokens.Last());

Demo

But in general i don't understand your reservations against Substring which is very efficient.

Answer 6

You can do like:

string value = "ab48/2012";
var charArray = value.ToCharArray().
           Reverse().TakeWhile(c=>char.IsDigit(c)).Reverse().ToArray();
var resultString = new string(charArray);

• create char array
• reverse it
• get all chars till first NOT digit
• reverse back
• pass to char array
• create a new string from that array

Answer 7

Try below code

var str = "ab48/2012";
            var strArr = string.Join("", str.Skip(2)).Split('/');
            Console.WriteLine(strArr[0]);
            Console.WriteLine(strArr[1]);

Answer 8

How about some Regex fu?

int value1, value2;
var match = Regex.Match(value, @"^[^\d]*(?<value1>[\d]+)/(?<value2>[\d]+)");
if (match.Success)
{
    value1 = int.Parse(match.Groups["value1"].Value);
    value2 = int.Parse(match.Groups["value2"].Value);
}