ArrayList.ToArray Methode

public:
 virtual cli::array <System::Object ^> ^ ToArray();

public virtual object[] ToArray ();

public virtual object?[] ToArray ();

abstract member ToArray : unit -> obj[]
override this.ToArray : unit -> obj[]

Public Overridable Function ToArray () As Object()

Gibt zurück

Object[]

Ein Object-Array, das Kopien der Elemente aus der ArrayList enthält.An Object array containing copies of the elements of the ArrayList.

Hinweise

Die-Elemente werden mithilfe von kopiert. dabei handelt es sich um Array.Copy einen- O(n) Vorgang, wobei n ist Count .The elements are copied using Array.Copy, which is an O(n) operation, where n is Count.

public:
 virtual Array ^ ToArray(Type ^ type);

public virtual Array ToArray (Type type);

abstract member ToArray : Type -> Array
override this.ToArray : Type -> Array

Public Overridable Function ToArray (type As Type) As Array

Parameter

Gibt zurück

Array

Ein Array vom angegebenen Elementtyp, das Kopien der Elemente aus ArrayList enthält.An array of the specified element type containing copies of the elements of the ArrayList.

Ausnahmen

Beispiele

Im folgenden Kopier Beispiel wird gezeigt, wie die Elemente eines ArrayList in ein Zeichen folgen Array kopiert werden.The following copy example shows how to copy the elements of an ArrayList to a string array.

using namespace System;
using namespace System::Collections;
void PrintIndexAndValues( ArrayList^ myList );
void PrintIndexAndValues( array<String^>^myArr );
int main()
{
   // Creates and initializes a new ArrayList.
   ArrayList^ myAL = gcnew ArrayList;
   myAL->Add( "The" );
   myAL->Add( "quick" );
   myAL->Add( "brown" );
   myAL->Add( "fox" );
   myAL->Add( "jumps" );
   myAL->Add( "over" );
   myAL->Add( "the" );
   myAL->Add( "lazy" );
   myAL->Add( "dog" );

   // Displays the values of the ArrayList.
   Console::WriteLine( "The ArrayList contains the following values:" );
   PrintIndexAndValues( myAL );

   // Copies the elements of the ArrayList to a string array.
   array<String^>^myArr = reinterpret_cast<array<String^>^>(myAL->ToArray( String::typeid ));

   // Displays the contents of the string array.
   Console::WriteLine( "The string array contains the following values:" );
   PrintIndexAndValues( myArr );
}

void PrintIndexAndValues( ArrayList^ myList )
{
   int i = 0;
   IEnumerator^ myEnum = myList->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ o = safe_cast<Object^>(myEnum->Current);
      Console::WriteLine( "\t[{0}]:\t{1}", i++, o );
   }

   Console::WriteLine();
}

void PrintIndexAndValues( array<String^>^myArr )
{
   for ( int i = 0; i < myArr->Length; i++ )
      Console::WriteLine( "\t[{0}]:\t{1}", i, myArr[ i ] );
   Console::WriteLine();
}

/* 
This code produces the following output.

The ArrayList contains the following values:
        [0]:    The
        [1]:    quick
        [2]:    brown
        [3]:    fox
        [4]:    jumps
        [5]:    over
        [6]:    the
        [7]:    lazy
        [8]:    dog

The string array contains the following values:
        [0]:    The
        [1]:    quick
        [2]:    brown
        [3]:    fox
        [4]:    jumps
        [5]:    over
        [6]:    the
        [7]:    lazy
        [8]:    dog

*/

using System;
using System.Collections;

public class SamplesArrayList  {

   public static void Main()  {

      // Creates and initializes a new ArrayList.
      ArrayList myAL = new ArrayList();
      myAL.Add( "The" );
      myAL.Add( "quick" );
      myAL.Add( "brown" );
      myAL.Add( "fox" );
      myAL.Add( "jumps" );
      myAL.Add( "over" );
      myAL.Add( "the" );
      myAL.Add( "lazy" );
      myAL.Add( "dog" );

      // Displays the values of the ArrayList.
      Console.WriteLine( "The ArrayList contains the following values:" );
      PrintIndexAndValues( myAL );

      // Copies the elements of the ArrayList to a string array.
      String[] myArr = (String[]) myAL.ToArray( typeof( string ) );

      // Displays the contents of the string array.
      Console.WriteLine( "The string array contains the following values:" );
      PrintIndexAndValues( myArr );
   }

   public static void PrintIndexAndValues( ArrayList myList )  {
      int i = 0;
      foreach ( Object o in myList )
         Console.WriteLine( "\t[{0}]:\t{1}", i++, o );
      Console.WriteLine();
   }

   public static void PrintIndexAndValues( String[] myArr )  {
      for ( int i = 0; i < myArr.Length; i++ )
         Console.WriteLine( "\t[{0}]:\t{1}", i, myArr[i] );
      Console.WriteLine();
   }
}


/*
This code produces the following output.

The ArrayList contains the following values:
        [0]:    The
        [1]:    quick
        [2]:    brown
        [3]:    fox
        [4]:    jumps
        [5]:    over
        [6]:    the
        [7]:    lazy
        [8]:    dog

The string array contains the following values:
        [0]:    The
        [1]:    quick
        [2]:    brown
        [3]:    fox
        [4]:    jumps
        [5]:    over
        [6]:    the
        [7]:    lazy
        [8]:    dog

*/

Imports System.Collections

Public Class SamplesArrayList

    Public Shared Sub Main()

        ' Creates and initializes a new ArrayList.
        Dim myAL As New ArrayList()
        myAL.Add("The")
        myAL.Add("quick")
        myAL.Add("brown")
        myAL.Add("fox")
        myAL.Add("jumps")
        myAL.Add("over")
        myAL.Add("the")
        myAL.Add("lazy")
        myAL.Add("dog")

        ' Displays the values of the ArrayList.
        Console.WriteLine("The ArrayList contains the following values:")
        PrintIndexAndValues(myAL)

        ' Copies the elements of the ArrayList to a string array.
        Dim myArr As String() = CType(myAL.ToArray(GetType(String)), String())

        ' Displays the contents of the string array.
        Console.WriteLine("The string array contains the following values:")
        PrintIndexAndValues(myArr)

    End Sub

    Overloads Public Shared Sub PrintIndexAndValues(myList As ArrayList)
        Dim i As Integer = 0
        Dim o As [Object]
        For Each o In  myList
            Console.WriteLine("        [{0}]:    {1}", i, o)
            i = i + 1
        Next o
        Console.WriteLine()
    End Sub

    Overloads Public Shared Sub PrintIndexAndValues(myArr() As String)
        Dim i As Integer
        For i = 0 To myArr.Length - 1
            Console.WriteLine("        [{0}]:    {1}", i, myArr(i))
        Next i
        Console.WriteLine()
    End Sub

End Class


'This code produces the following output.
'
'The ArrayList contains the following values:
'        [0]:    The
'        [1]:    quick
'        [2]:    brown
'        [3]:    fox
'        [4]:    jumps
'        [5]:    over
'        [6]:    the
'        [7]:    lazy
'        [8]:    dog
'
'The string array contains the following values:
'        [0]:    The
'        [1]:    quick
'        [2]:    brown
'        [3]:    fox
'        [4]:    jumps
'        [5]:    over
'        [6]:    the
'        [7]:    lazy
'        [8]:    dog

Hinweise

Alle-Objekte im-Objekt werden in ArrayList das angegebene-Objekt Type im- type Parameter umgewandelt.All of the objects in the ArrayList object will be cast to the Type specified in the type parameter.

Die-Elemente werden mithilfe von kopiert. dabei handelt es sich um Array.Copy einen- O(n) Vorgang, wobei n ist Count .The elements are copied using Array.Copy, which is an O(n) operation, where n is Count.

Siehe auch

• Type