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Método ArrayList.Add (Object)

 

Publicado: octubre de 2016

Agrega un objeto al final de ArrayList.

Espacio de nombres:   System.Collections
Ensamblado:  mscorlib (en mscorlib.dll)

public virtual int Add(
	object value
)

Parámetros

value
Type: System.Object

Objeto Object que se va a agregar al final de la colección ArrayList. El valor puede ser null.

Valor devuelto

Type: System.Int32

Índice de ArrayList en el que se ha agregado value.

Exception Condition
NotSupportedException

ArrayList es de solo lectura.

O bien

ArrayList tiene un tamaño fijo.

ArrayList accepts null as a valid value and allows duplicate elements.

If P:System.Collections.ArrayList.Count already equals P:System.Collections.ArrayList.Capacity, the capacity of the T:System.Collections.ArrayList is increased by automatically reallocating the internal array, and the existing elements are copied to the new array before the new element is added.

If P:System.Collections.ArrayList.Count is less than P:System.Collections.ArrayList.Capacity, this method is an O(1) operation. If the capacity needs to be increased to accommodate the new element, this method becomes an O(n) operation, where n is P:System.Collections.ArrayList.Count.

The following code example shows how to add elements to the T:System.Collections.ArrayList.

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" );

      // Creates and initializes a new Queue.
      Queue myQueue = new Queue();
      myQueue.Enqueue( "jumped" );
      myQueue.Enqueue( "over" );
      myQueue.Enqueue( "the" );
      myQueue.Enqueue( "lazy" );
      myQueue.Enqueue( "dog" );

      // Displays the ArrayList and the Queue.
      Console.WriteLine( "The ArrayList initially contains the following:" );
      PrintValues( myAL, '\t' );
      Console.WriteLine( "The Queue initially contains the following:" );
      PrintValues( myQueue, '\t' );

      // Copies the Queue elements to the end of the ArrayList.
      myAL.AddRange( myQueue );

      // Displays the ArrayList.
      Console.WriteLine( "The ArrayList now contains the following:" );
      PrintValues( myAL, '\t' );
   }

   public static void PrintValues( IEnumerable myList, char mySeparator )  {
      foreach ( Object obj in myList )
         Console.Write( "{0}{1}", mySeparator, obj );
      Console.WriteLine();
   }

}


/* 
This code produces the following output.

The ArrayList initially contains the following:
    The    quick    brown    fox
The Queue initially contains the following:
    jumped    over    the    lazy    dog
The ArrayList now contains the following:
    The    quick    brown    fox    jumped    over    the    lazy    dog
*/ 

Plataforma universal de Windows
Disponible desde 10
.NET Framework
Disponible desde 1.1
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