C# how to extract part of string

Question

how can I extract a part from string with "-" separated between the characters? for example, I want to extract "123" from "123-4567-9012" or extract "4567" from "123-4567-9012" or even 9012 from the same string

you van use Substring, or you can Split and get them with array.. — techBeginner
– techBeginner, Commented Dec 12, 2012 at 10:06

Habib · Accepted Answer · 2012-12-12 10:06:25Z

10

Just split on the - character and later you can access them. Use string.Split(char[])

string str  = "123-4567-9012";
string[] arr = str.Split('-');

it will result in:

arr[0] = "123";
arr[1] = "4567";
arr[2] = "9012"

answered Dec 12, 2012 at 10:06

Habib

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Vitaliy · Accepted Answer · 2012-12-12 10:09:39Z

3

Probably more effective if you need only first occurrence:

var str = "123-4567-9012";
var substr = str.Substring(0, str.IndexOf('-'));

answered Dec 12, 2012 at 10:09

Vitaliy

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Dave Kerr · Accepted Answer · 2012-12-12 10:12:42Z

3

If you String.Split, you can break a string into separate parts, based on a delimter. For example, using:

var input = "123-4567-9012";
var parts = input.Split('-');
foreach(var part in parts)
  Console.WriteLine(part);

Will output:

123
4567
9012

You can do the opposite with String.Join- for example.

var result = String.Join("-", parts);
Console.WriteLine(result);

Will output:

123-4567-9012

answered Dec 12, 2012 at 10:12

Dave Kerr

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