C# String CopyTo

Description

String CopyTo copies a specified number of characters from a specified position in this instance to a specified position in an array of Unicode characters.

Syntax

String.CopyTo has the following syntax.

public void CopyTo(
  int sourceIndex,
  char[] destination,
  int destinationIndex,
  int count//from w w w  .j  a  va 2 s. c o m
)

Parameters

String.CopyTo has the following parameters.

• sourceIndex - The index of the first character in this instance to copy.
• destination - An array of Unicode characters to which characters in this instance are copied.
• destinationIndex - The index in destination at which the copy operation begins.
• count - The number of characters in this instance to copy to destination.

Returns

String.CopyTo method returns

Example

The following example demonstrates the CopyTo method.

/*from   w ww  . ja  va  2 s  .c  om*/
using System;

public class CopyToTest {
    public static void Main() {
        string strSource = "changed";
        char [] destination = { 'T', 'h', 'e', ' ', 'i', 'n', 'i', 't', 'i', 'a', 'l', ' ',
                'a', 'r', 'r', 'a', 'y' };

        strSource.CopyTo ( 0, destination, 4, strSource.Length );
        Console.WriteLine( destination );

        strSource = "A different string";

        // Embed only a section of the source string in the destination
        strSource.CopyTo ( 2, destination, 3, 9 );

        Console.WriteLine( destination );
    }
}

The code above generates the following result.