VB.NET - String ToCharArray Function

ToCharArray. This converts a VB.NET String to a Char array. It returns a Char array with a number of elements equal to the Length of the String.

String Length

With this Char array, we can change the String data efficiently, without copying it. It is possible to convert the char array back into a String as well.

String Constructor

First, this program declares and assigns a string that points to the literal "abcd". Then the ToCharArray function is called on the String variable.

Finally The For-Each loop enumerates all the characters in the array. We print each element to the console.

For

Note You can see that the character array contains the same characters as the original string.

Module Module1 Sub Main() ' String input value. Dim value As String = "abcd" ' Call ToCharArray function. Dim array() As Char = value.ToCharArray ' Loop over Char array. For Each element As Char In array Console.WriteLine(element) Next End Sub End Module

a b c d

A discussion. Char arrays are mutable and String instances are not. This means we can modify individual characters without changing the rest of the string. This can improve performance.

Note You can change the individual characters in a Char array without copying the entire set of characters again.

A summary. ToCharArray converts strings to their equivalent Char arrays. You cannot cast the String to a Char array. You must convert it—the best way is usually with ToCharArray.

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This page was last updated on Mar 25, 2022 (image).

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