How can I split a string like "12-15" into two numbers?

Question

My front-end application sends strings that look like this:

"12-15"

to a back-end C# application.

Can someone give me some pointers as to how I could extract the two numbers into two variables. Note the format is always the same with two numbers and a hyphen between them.

score 3 · Answer 1 · answered Sep 24 '16 at 05:36

3

 string stringToSplit = "12-15";
 string[] splitStringArray;
 splitStringArray = stringToSplit.Split('-');

splitStringArray[0] will be 12

splitStringArray[1] will be 15

answered Sep 24 '16 at 05:36

JohnG

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I need to get the numbers 12 and 15 to be int. Can I just cast these to int or should I use something else? – Alan2 Sep 24 '16 at 05:40
int.TryParse(string, out intVariable) – JohnG Sep 24 '16 at 05:42

score 2 · Answer 2 · edited Sep 24 '16 at 05:50

2

int[] numbers = "12-15".Split('-')
        .Select(x => {
            int n;
            int.TryParse(x, out n);
            return n;
        })
        .ToArray();

edited Sep 24 '16 at 05:50

Raktim Biswas

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answered Sep 24 '16 at 05:38

Dan

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score 2 · Accepted Answer · answered Sep 24 '16 at 05:47

2

Split the string into parts:

string s = "12-15";
string[] num = s.Split('-');
int part1 = Convert.ToInt32(num[0]);
int part2 = Convert.ToInt32(num[1]);

answered Sep 24 '16 at 05:47

Raktim Biswas

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MMM · Answer 4 · 2016-09-24T05:43:31.267

1

We call Split on a string instance. This program splits on a single character

string s ="12-15";
string[] words = s.Split('-');
foreach (string word in words)
{
    int convertedvalue = Convert.ToInt32(word ); 
    Console.WriteLine(word);
}

string[] ss= s.Split('-');
int x = Convert.ToInt32(ss[0]);
int y = Convert.ToInt32(ss[1]);

more info

edited Sep 24 '16 at 05:43

answered Sep 24 '16 at 05:35

MMM

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How can I make the strings as ints? – Alan2 Sep 24 '16 at 05:40
once you split you will get those values inside loop then you can convert to int using dot net conversion helpers – MMM Sep 24 '16 at 05:42

Nick Holmquist · Answer 5 · 2016-09-30T03:29:17.930

1

Here is the correct version without the wrong code

string textReceived = "12-15";

string[] numbers = textReceived.Split('-');
List<int> numberCollection = new List<int>();
foreach (var item in numbers)
{
    numberCollection.Add(Convert.ToInt32(item));
}

edited Sep 30 '16 at 03:29

answered Sep 24 '16 at 05:41

Nick Holmquist

26
3

won't the split return strings? – Alan2 Sep 24 '16 at 05:42
Look at the revised code this will give a nice int list to work with. – Nick Holmquist Sep 24 '16 at 05:57
The code you wrote in the first three examples does not even compile... The return type of String.Split is string[], not int[]. – jeroenh Sep 29 '16 at 08:03
@jeroenh you are correct I just wasnt sure if you are supposed to leave your code before your revisions or not i will take them off now – Nick Holmquist Sep 30 '16 at 03:28
@Nick the goal is for future readers to have a clear answer. You can always consult the history of changes if needed. – jeroenh Sep 30 '16 at 05:35
@jeroenh thank you for the information I will follow those guidelines from now on – Nick Holmquist Oct 01 '16 at 07:17

score 1 · Answer 6 · edited Sep 29 '16 at 07:59

1

You can use the below code to split and it will return string for each value, then you can typecast it to any type you wish to ...

string myString = "12-15-18-20-25-60";
string[] splittedStrings = myString.Split('-');
foreach (var splittedString in splittedStrings)
{
    Console.WriteLine(splittedString + "\n");
}
Console.ReadLine();

edited Sep 29 '16 at 07:59

Raktim Biswas

4,011
5
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answered Sep 24 '16 at 05:43

ankitmvp

33
4

score 0 · Answer 7 · edited May 23 '17 at 12:02

0

String numberString = "12-15" ;
string[] arr = numberString.Split("-");

Now you will get a string array , you can use parsing to get the numbers alone

int firstNumber = Convert.ToInt32(arr[0]);

Helpful answer related to parsing :

https://stackoverflow.com/a/199484/5395773

edited May 23 '17 at 12:02

Community

1
1

answered Sep 24 '16 at 06:01

Venkat

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score 0 · Answer 8 · edited Sep 29 '16 at 07:59

0

string str = null;
string[] strArr = null;
int count = 0;
str = "12-15";
char[] splitchar = { '-' };

strArr = str.Split(splitchar);
for (count = 0; count <= strArr.Length - 1; count++)
{
    MessageBox.Show(strArr[count]);
}

edited Sep 29 '16 at 07:59

Raktim Biswas

4,011
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27
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answered Sep 24 '16 at 06:02

Asifuzzaman Redoy

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score 0 · Answer 9 · edited May 23 '17 at 10:29

You could convert that string explicitly to an integer array using Array.ConvertAll method and access the numbers using their index, you can run the below example here.

using System;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var number = "12-15";
            var numbers = Array.ConvertAll(number.Split('-'), int.Parse);
            Console.WriteLine(numbers[0]);
            Console.WriteLine(numbers[1]);
        }
    }
}

Or you can explicitly convert the numeric string using int.Parse method, the int keyword is an alias name for System.Int32 and it is preffered over the complete system type name System.Int32, you can run the below example here.

using System;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var number = "12-15";
            var numbers = number.Split('-');
            var one = int.Parse(numbers[0]);
            var two = int.Parse(numbers[1]);
            Console.WriteLine(one);
            Console.WriteLine(two);
        }
    }
}

Additional read: Please check int.Parse vs. Convert.Int32 vs. int.TryParse for more insight on parsing the input to integer

How can I split a string like "12-15" into two numbers?

9 Answers9