Queue.CopyTo(Array, Int32) Méthode

Définition

Espace de noms:

System.Collections

Assembly:

System.Collections.NonGeneric.dll

Source:

Queue.cs

Copie les éléments Queue dans un Array unidimensionnel existant, en commençant au niveau de l'index de tableau spécifié.

public:
 virtual void CopyTo(Array ^ array, int index);

public virtual void CopyTo (Array array, int index);

abstract member CopyTo : Array * int -> unit
override this.CopyTo : Array * int -> unit

Public Overridable Sub CopyTo (array As Array, index As Integer)

Paramètres

array

Array

Array unidimensionnel qui constitue la destination des éléments copiés à partir de Queue. Array doit avoir une indexation de base zéro.

index

Int32

Index de base zéro dans l'array à partir duquel la copie commence.

Implémente

CopyTo(Array, Int32)

Exceptions

ArgumentNullException

array a la valeur null.

ArgumentOutOfRangeException

index est inférieur à zéro.

ArgumentException

array est multidimensionnel.

- ou -

Le nombre d’éléments dans le Queue source est supérieur à la quantité d’espace disponible entre index et la fin du array de destination.

ArrayTypeMismatchException

Le type du Queue source ne peut pas être converti automatiquement en type du array de destination.

Exemples

L’exemple suivant montre comment copier un Queue dans un tableau unidimensionnel.

using namespace System;
using namespace System::Collections;
void PrintValues( Array^ myArr, char mySeparator );
int main()
{
   // Creates and initializes the source Queue.
   Queue^ mySourceQ = gcnew Queue;
   mySourceQ->Enqueue( "three" );
   mySourceQ->Enqueue( "napping" );
   mySourceQ->Enqueue( "cats" );
   mySourceQ->Enqueue( "in" );
   mySourceQ->Enqueue( "the" );
   mySourceQ->Enqueue( "barn" );

   // Creates and initializes the one-dimensional target Array.
   Array^ myTargetArray = Array::CreateInstance( String::typeid, 15 );
   myTargetArray->SetValue( "The", 0 );
   myTargetArray->SetValue( "quick", 1 );
   myTargetArray->SetValue( "brown", 2 );
   myTargetArray->SetValue( "fox", 3 );
   myTargetArray->SetValue( "jumps", 4 );
   myTargetArray->SetValue( "over", 5 );
   myTargetArray->SetValue( "the", 6 );
   myTargetArray->SetValue( "lazy", 7 );
   myTargetArray->SetValue( "dog", 8 );

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

   // Copies the entire source Queue to the target Array, starting at index 6.
   mySourceQ->CopyTo( myTargetArray, 6 );

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

   // Copies the entire source Queue to a new standard array.
   array<Object^>^myStandardArray = mySourceQ->ToArray();

   // Displays the values of the new standard array.
   Console::WriteLine( "The new standard array contains the following:" );
   PrintValues( myStandardArray, ' ' );
}

void PrintValues( Array^ myArr, char mySeparator )
{
   IEnumerator^ myEnum = myArr->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ myObj = safe_cast<Object^>(myEnum->Current);
      Console::Write( "{0}{1}", mySeparator, myObj );
   }

   Console::WriteLine();
}

/* 
 This code produces the following output.
 
 The target Array contains the following (before and after copying):
  The quick brown fox jumps over the lazy dog
  The quick brown fox jumps over three napping cats in the barn
 The new standard array contains the following:
  three napping cats in the barn

 */

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

   public static void Main()  {

      // Creates and initializes the source Queue.
      Queue mySourceQ = new Queue();
      mySourceQ.Enqueue( "three" );
      mySourceQ.Enqueue( "napping" );
      mySourceQ.Enqueue( "cats" );
      mySourceQ.Enqueue( "in" );
      mySourceQ.Enqueue( "the" );
      mySourceQ.Enqueue( "barn" );

      // Creates and initializes the one-dimensional target Array.
      Array myTargetArray=Array.CreateInstance( typeof(string), 15 );
      myTargetArray.SetValue( "The", 0 );
      myTargetArray.SetValue( "quick", 1 );
      myTargetArray.SetValue( "brown", 2 );
      myTargetArray.SetValue( "fox", 3 );
      myTargetArray.SetValue( "jumps", 4 );
      myTargetArray.SetValue( "over", 5 );
      myTargetArray.SetValue( "the", 6 );
      myTargetArray.SetValue( "lazy", 7 );
      myTargetArray.SetValue( "dog", 8 );

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

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

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

      // Copies the entire source Queue to a new standard array.
      Object[] myStandardArray = mySourceQ.ToArray();

      // Displays the values of the new standard array.
      Console.WriteLine( "The new standard array contains the following:" );
      PrintValues( myStandardArray, ' ' );
   }

   public static void PrintValues( Array myArr, char mySeparator )  {
      foreach ( Object myObj in myArr )  {
         Console.Write( "{0}{1}", mySeparator, myObj );
      }
      Console.WriteLine();
   }
}
/*
This code produces the following output.

The target Array contains the following (before and after copying):
 The quick brown fox jumps over the lazy dog
 The quick brown fox jumps over three napping cats in the barn
The new standard array contains the following:
 three napping cats in the barn

*/

Imports System.Collections

Public Class SamplesQueue    

    Public Shared Sub Main()

        ' Creates and initializes the source Queue.
        Dim mySourceQ As New Queue()
        mySourceQ.Enqueue("three")
        mySourceQ.Enqueue("napping")
        mySourceQ.Enqueue("cats")
        mySourceQ.Enqueue("in")
        mySourceQ.Enqueue("the")
        mySourceQ.Enqueue("barn")

        ' Creates and initializes the one-dimensional target Array.
        Dim myTargetArray As Array = Array.CreateInstance(GetType(String), 15)
        myTargetArray.SetValue("The", 0)
        myTargetArray.SetValue("quick", 1)
        myTargetArray.SetValue("brown", 2)
        myTargetArray.SetValue("fox", 3)
        myTargetArray.SetValue("jumps", 4)
        myTargetArray.SetValue("over", 5)
        myTargetArray.SetValue("the", 6)
        myTargetArray.SetValue("lazy", 7)
        myTargetArray.SetValue("dog", 8)

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

        ' Copies the entire source Queue to the target Array, starting
        ' at index 6.
        mySourceQ.CopyTo(myTargetArray, 6)

        ' Displays the values of the target Array.
        PrintValues(myTargetArray, " "c)

        ' Copies the entire source Queue to a new standard array.
        Dim myStandardArray As Object() = mySourceQ.ToArray()

        ' Displays the values of the new standard array.
        Console.WriteLine("The new standard array contains the following:")
        PrintValues(myStandardArray, " "c)

    End Sub

    Public Shared Sub PrintValues(myArr As Array, mySeparator As Char)
        Dim myObj As [Object]
        For Each myObj In  myArr
            Console.Write("{0}{1}", mySeparator, myObj)
        Next myObj
        Console.WriteLine()
    End Sub

End Class


' This code produces the following output.
' 
' The target Array contains the following (before and after copying):
'  The quick brown fox jumps over the lazy dog
'  The quick brown fox jumps over three napping cats in the barn
' The new standard array contains the following:
'  three napping cats in the barn

Remarques

Les éléments sont copiés dans le Array dans le même ordre dans lequel l’énumérateur effectue une itération dans le Queue.

Cette méthode est une O(n) opération, où n est Count.