How to use C# string Split

C# Split() handles splitting upon given string and character delimiters. It returns an array of String containing the substrings delimited by the given System.Char array.

If your String contains "dd-mm-yy", split on the "-" character to get an array of: "dd" "mm" "yy".

The String Split method ignores any element of separator whose value is null or the empty string ("").

Syntax :

string[] string.split(string[] separator)

Parameters:

Separator - the given delimiter

Returns:

An array of Strings delimited by one or more characters in separator.

using System; using System.Windows.Forms; namespace WindowsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { string str = null; string[] strArr = null; int count = 0; str = "CSharp split test"; char[] splitchar = { ' ' }; strArr = str.Split(splitchar); for (count = 0; count <= strArr.Length - 1; count++) { MessageBox.Show(strArr[count]); } } } }

Output:

CSharp split test

C# String Split Example

How to split strings using regular expressions

The Regular Expressions Split() methods are almost similar to the String.Split() method, except that Regex.Split() method splits the string at a delimiter determined by a Regular Expression instead of a set of characters.

When using Regular Expressions you should use the following namespace in your project.

using System.Text.RegularExpressions;

string str = "one\n \ntwo\n \nthree\n \n \nfour"; string[] result = Regex.Split(str, "\n\\s*"); for (int i = 0; i < result.Length; i++) MessageBox.Show(result[i]);

Output:

one two three four

c# String Split by multiple characters delimiter

We can split a string by multiple character delimiter using String.split() method.

string input = "one)(two)(three)(four)(five"; string[] result = input.Split(new string[] { ")(" }, StringSplitOptions.None); foreach (string s in result) MessageBox.Show(s);

Output:

one two three four five

Using Regular Expressions for multiple characters

C# String Split by multiple characters delimiter using Regular Expressions

string input = "one)(two)(three)(four)(five"; string[] result = Regex.Split(input, @"\)\("); foreach (string s in result) MessageBox.Show(s);

Output:

one two three four five

C# String split New Line

You can split a string on a new line or carriage return using the delimiter "\r\n".

C# String split Carriage Return

string test = "One\nTwo\r\nThree\nFour\n"; string[] result = test.Split(new string[] { "\n", "\r\n" }, StringSplitOptions.RemoveEmptyEntries); foreach (string s in result) MessageBox.Show(s);

Output:

one two three four

Environment.NewLine

Also you can use Environment.NewLine to remove the new line from a string

string test = "One\r\nTwo\r\nThree\r\nFour"; string[] result = test.Split(new string[] { Environment.NewLine }, StringSplitOptions.None); foreach (string s in result) MessageBox.Show(s);

Output:

one two three four

|BLBS^ |How to split() a delimited string to a List < String > |BLBE^ |

You can retrieve the result of a String splt() method to a C# List. The following program convert the String Array to a List.

C# Convert List to String

string s = "This is a sentence."; IList<string> list = new List<string>(s.Split(new string[] { " is " }, StringSplitOptions.None)); foreach (string element in list) { MessageBox.Show(element); }

C# String split White spaces

StringSplitOptions.RemoveEmptyEntries guarantees the return value does not include array elements that contain an empty string. The following C# program shows how to remove all white spaces from string using StringSplitOptions.RemoveEmptyEntries.

Full Source C#

using System.Linq; using System.Text; using System.Windows.Forms; using System.Text.RegularExpressions; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { string myStrA = "one two three four five"; string[] result = myStrA.Split(new char[0], StringSplitOptions.RemoveEmptyEntries); foreach (string s in result) MessageBox.Show(s); } } }

When you execute this C# program you will get the result removing all white spaces from the string

Next : How to use C# string Substring

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