Export (0) Print
Expand All

ArrayList.CopyTo Method (Array)

Copies the entire ArrayList to a compatible one-dimensional Array, starting at the beginning of the target array.

Namespace:  System.Collections
Assembly:  mscorlib (in mscorlib.dll)

public virtual void CopyTo(
	Array array
)

Parameters

array
Type: System.Array
The one-dimensional Array that is the destination of the elements copied from ArrayList. The Array must have zero-based indexing.

ExceptionCondition
ArgumentNullException

array is null.

ArgumentException

array is multidimensional.

-or-

The number of elements in the source ArrayList is greater than the number of elements that the destination array can contain.

InvalidCastException

The type of the source ArrayList cannot be cast automatically to the type of the destination array.

The specified array must be of a compatible type.

This method uses Array.Copy to copy the elements.

The elements are copied to the Array in the same order in which the enumerator iterates through the ArrayList.

This method is an O(n) operation, where n is Count.

The following code example shows how to copy an ArrayList into a one-dimensional System.Array.


 using System;
 using System.Collections;
 public class SamplesArrayList  {

    public static void Main()  {

       // Creates and initializes the source ArrayList.
       ArrayList mySourceList = new ArrayList();
       mySourceList.Add( "three" );
       mySourceList.Add( "napping" );
       mySourceList.Add( "cats" );
       mySourceList.Add( "in" );
       mySourceList.Add( "the" );
       mySourceList.Add( "barn" );

       // Creates and initializes the one-dimensional target Array.
       String[] myTargetArray = new String[15];
       myTargetArray[0] = "The";
       myTargetArray[1] = "quick";
       myTargetArray[2] = "brown";
       myTargetArray[3] = "fox";
       myTargetArray[4] = "jumped";
       myTargetArray[5] = "over";
       myTargetArray[6] = "the";
       myTargetArray[7] = "lazy";
       myTargetArray[8] = "dog";

       // Displays the values of the target Array.
       Console.WriteLine( "The target Array contains the following (before and after copying):" );
       PrintValues( myTargetArray, ' ' );

       // Copies the second element from the source ArrayList to the target Array starting at index 7.
       mySourceList.CopyTo( 1, myTargetArray, 7, 1 );

       // Displays the values of the target Array.
       PrintValues( myTargetArray, ' ' );

       // Copies the entire source ArrayList to the target Array starting at index 6.
       mySourceList.CopyTo( myTargetArray, 6 );

       // Displays the values of the target Array.
       PrintValues( myTargetArray, ' ' );

       // Copies the entire source ArrayList to the target Array starting at index 0.
       mySourceList.CopyTo( myTargetArray );

       // Displays the values of the target Array.
       PrintValues( myTargetArray, ' ' );
    }

    public static void PrintValues( String[] myArr, char mySeparator )  {
       for ( int i = 0; i < myArr.Length; i++ )
          Console.Write( "{0}{1}", mySeparator, myArr[i] );
       Console.WriteLine();
    }

 }


 /* 
 This code produces the following output.

 The target Array contains the following (before and after copying):
  The quick brown fox jumped over the lazy dog
  The quick brown fox jumped over the napping dog
  The quick brown fox jumped over three napping cats in the barn
  three napping cats in the barn three napping cats in the barn
 */ 



.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Community Additions

ADD
Show:
© 2014 Microsoft