ArrayList.ToArray Yöntem

Tanım

Ad Alanı:

System.Collections

Bütünleştirilmiş Kod:

System.Runtime.dll

öğelerini ArrayList yeni bir diziye kopyalar.

Aşırı Yüklemeler

ToArray()	öğelerini ArrayList yeni Object bir diziye kopyalar.
ToArray(Type)	öğesinin ArrayList öğelerini belirtilen öğe türünde yeni bir diziye kopyalar.

ToArray()

Kaynak:

ArrayList.cs

öğelerini ArrayList yeni Object bir diziye kopyalar.

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

public virtual object?[] ToArray ();

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

Public Overridable Function ToArray () As Object()

Döndürülenler

Object[]

Object öğelerinin ArrayListkopyalarını içeren bir dizi.

Açıklamalar

Öğeler kullanılarak kopyalanır Array.Copy. Bu bir O(n) işlemdir ve burada n da şeklindedir Count.

ToArray(Type)

Kaynak:

ArrayList.cs

öğesinin ArrayList öğelerini belirtilen öğe türünde yeni bir diziye kopyalar.

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

Parametreler

type

Type

Öğeleri oluşturulup kopyalanacak hedef dizinin öğesi Type .

Döndürülenler

Array

öğesinin öğelerinin kopyalarını içeren belirtilen öğe türünde bir ArrayListdizi.

Özel durumlar

ArgumentNullException

type, null değeridir.

InvalidCastException

Kaynağın ArrayList türü otomatik olarak belirtilen türe atılamaz.

Örnekler

Aşağıdaki kopyalama örneği, öğesinin ArrayList öğelerinin bir dize dizisine nasıl kopyalanmasını gösterir.

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

Açıklamalar

Nesnedeki ArrayList tüm nesneler parametresinde type belirtilene Type yayınlanır.

Öğeler kullanılarak kopyalanır Array.Copy. Bu bir O(n) işlemdir ve burada n da şeklindedir Count.

Ayrıca bkz.

• Type