String.ToCharArray Method

Reference

Definition

Namespace:: System

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Copies the characters in this instance to a Unicode character array.

Overloads

ToCharArray(Int32, Int32)	Copies the characters in a specified substring in this instance to a Unicode character array.
ToCharArray()	Copies the characters in this instance to a Unicode character array.

ToCharArray(Int32, Int32)

Source:: String.cs

Source:: String.cs

Source:: String.cs

Copies the characters in a specified substring in this instance to a Unicode character array.

public:
 cli::array <char> ^ ToCharArray(int startIndex, int length);

public char[] ToCharArray (int startIndex, int length);

member this.ToCharArray : int * int -> char[]

Public Function ToCharArray (startIndex As Integer, length As Integer) As Char()

Parameters

startIndex: Int32

The starting position of a substring in this instance.

length: Int32

The length of the substring in this instance.

Returns

Char[]

A Unicode character array whose elements are the length number of characters in this instance starting from character position startIndex.

Exceptions

ArgumentOutOfRangeException

startIndex or length is less than zero.

-or-

startIndex plus length is greater than the length of this instance.

Examples

The following example converts a substring within a string to an array of characters, then enumerates and displays the elements of the array.

// Sample for String::ToCharArray(Int32, Int32)
using namespace System;
using namespace System::Collections;
int main()
{
   String^ str = "012wxyz789";
   array<Char>^arr;
   arr = str->ToCharArray( 3, 4 );
   Console::Write( "The letters in '{0}' are: '", str );
   Console::Write( arr );
   Console::WriteLine( "'" );
   Console::WriteLine( "Each letter in '{0}' is:", str );
   IEnumerator^ myEnum = arr->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Char c =  safe_cast<Char>(myEnum->Current);
      Console::WriteLine( c );
   }
}

/*
This example produces the following results:
The letters in '012wxyz789' are: 'wxyz'
Each letter in '012wxyz789' is:
w
x
y
z
*/

// Sample for String.ToCharArray(Int32, Int32)
using System;

class Sample {
    public static void Main() {
    string str = "012wxyz789";
    char[] arr;

    arr = str.ToCharArray(3, 4);
    Console.Write("The letters in '{0}' are: '", str);
    Console.Write(arr);
    Console.WriteLine("'");
    Console.WriteLine("Each letter in '{0}' is:", str);
    foreach (char c in arr)
        Console.WriteLine(c);
    }
}
/*
This example produces the following results:
The letters in '012wxyz789' are: 'wxyz'
Each letter in '012wxyz789' is:
w
x
y
z
*/

// Sample for String.ToCharArray(Int32, Int32)
let str = "012wxyz789"

let arr = str.ToCharArray(3, 4)
printf $"The letters in '{str}' are: '"
printf $"{arr}"
printfn "'"
printfn $"Each letter in '{str}' is:"
for c in arr do
    printfn $"{c}"
(*
This example produces the following results:
The letters in '012wxyz789' are: 'wxyz'
Each letter in '012wxyz789' is:
w
x
y
z
*)

' Sample for String.ToCharArray(Int32, Int32)
Class Sample
   
   Public Shared Sub Main()
      Dim str As String = "012wxyz789"
      Dim arr() As Char
      
      arr = str.ToCharArray(3, 4)
      Console.Write("The letters in '{0}' are: '", str)
      Console.Write(arr)
      Console.WriteLine("'")
      Console.WriteLine("Each letter in '{0}' is:", str)
      Dim c As Char
      For Each c In arr
         Console.WriteLine(c)
      Next c
   End Sub
End Class
'
'This example produces the following results:
'The letters in '012wxyz789' are: 'wxyz'
'Each letter in '012wxyz789' is:
'w
'x
'y
'z
'

Remarks

This method copies the characters in a portion of a string to a character array. To create a string from a range of characters in a character array, call the String(Char[], Int32, Int32) constructor.

The startIndex parameter is zero-based. That is, the index of the first character in the string instance is zero.

If length is zero, the returned array is empty and has a zero length. If this instance is null or an empty string (""), the returned array is empty and has a zero length.

To create a byte array that contains the encoded characters in a portion of a string, instantiate the appropriate Encoding object and call its GetBytes(String, Int32, Int32, Byte[], Int32) method. Some of the standard encodings available in .NET include:

Encoding	Object
ASCII	ASCIIEncoding
UTF-7	UTF7Encoding
UTF-8	UTF8Encoding
UTF-16	UnicodeEncoding
UTF-32	UTF32Encoding

For more information, see Character Encoding in .NET.

Applies to

ToCharArray()

Source:: String.cs

Source:: String.cs

Source:: String.cs

Copies the characters in this instance to a Unicode character array.

public:
 cli::array <char> ^ ToCharArray();

public char[] ToCharArray ();

member this.ToCharArray : unit -> char[]

Public Function ToCharArray () As Char()

Returns

Char[]

A Unicode character array whose elements are the individual characters of this instance. If this instance is an empty string, the returned array is empty and has a zero length.

Examples

The following example calls the ToCharArray method to extract the characters in a string to a character array. It then displays the original string and the elements in the array.

using System;

public class Example
{
   public static void Main()
   {
      string s = "AaBbCcDd";
      char[] chars = s.ToCharArray();
      Console.WriteLine("Original string: {0}", s);
      Console.WriteLine("Character array:");
      for (int ctr = 0; ctr < chars.Length; ctr++)
      {
         Console.WriteLine("   {0}: {1}", ctr, chars[ctr]);
      }
   }
}

// The example displays the following output:
//     Original string: AaBbCcDd
//     Character array:
//        0: A
//        1: a
//        2: B
//        3: b
//        4: C
//        5: c
//        6: D
//        7: d

let s = "AaBbCcDd"
let chars = s.ToCharArray()
printfn $"Original string: {s}"
printfn "Character array:"
for i = 0 to chars.Length - 1 do
    printfn $"   {i}: {chars[i]}"

// The example displays the following output:
//     Original string: AaBbCcDd
//     Character array:
//        0: A
//        1: a
//        2: B
//        3: b
//        4: C
//        5: c
//        6: D
//        7: d

Module Example
   Public Sub Main()
      Dim s As String = "AaBbCcDd"
      Dim chars() = s.ToCharArray()
      Console.WriteLine("Original string: {0}", s)
      Console.WriteLine("Character array:")
      For ctr = 0 to chars.Length - 1
         Console.WriteLine("   {0}: {1}", ctr, chars(ctr))
      Next
   End Sub
End Module
' The example displays the following output:
'     Original string: AaBbCcDd
'     Character array:
'        0: A
'        1: a
'        2: B
'        3: b
'        4: C
'        5: c
'        6: D
'        7: d

Remarks

This method copies each character (that is, each Char object) in a string to a character array. The first character copied is at index zero of the returned character array; the last character copied is at index Array.Length - 1.

To create a string from the characters in a character array, call the String(Char[]) constructor.

To create a byte array that contains the encoded characters in a string, instantiate the appropriate Encoding object and call its Encoding.GetBytes(String) method. Some of the standard encodings available in .NET include the following:

Encoding	Object
ASCII	ASCIIEncoding
UTF-7	UTF7Encoding
UTF-8	UTF8Encoding
UTF-16	UnicodeEncoding
UTF-32	UTF32Encoding

For more information, see Character Encoding in .NET.

Applies to

Share via

String.ToCharArray Method

Definition

Overloads

ToCharArray(Int32, Int32)

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to

ToCharArray()

Returns

Examples

Remarks

See also

Applies to

Additional resources