Queue.CopyTo(Array, Int32) Méthode

Définition

Espace de noms:
System.Collections
Assemblys:
mscorlib.dll, System.Collections.NonGeneric.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll

Copie les Queue éléments dans un index de tableau unidimensionnel Arrayexistant, en commençant à 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

Unidimensionnel Array qui est la destination des éléments copiés à partir de Queue. L’indexation Array doit être basée sur zéro.

index
Int32

Index de base zéro dans array lequel 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 de la source Queue est supérieur à l’espace disponible de index la fin de la destination array.

ArrayTypeMismatchException

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

Exemples

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

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 même ordre dans lequel l’énumérateur itère dans le Queue.

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

S’applique à