List<T>.RemoveRange(Int32, Int32) Método

Definición

Quita todos los elementos de List<T>.Removes a range of elements from the List<T>.

public:
 void RemoveRange(int index, int count);
public void RemoveRange (int index, int count);
member this.RemoveRange : int * int -> unit
Public Sub RemoveRange (index As Integer, count As Integer)

Parámetros

index
Int32

Índice inicial de base cero del intervalo de elementos que se va a quitar.The zero-based starting index of the range of elements to remove.

count
Int32

Número de elementos que se va a quitar.The number of elements to remove.

Excepciones

index es menor que 0.index is less than 0.

o bien-or- count es menor que 0.count is less than 0.

index y count no denotan un intervalo válido de elementos en la List<T>.index and count do not denote a valid range of elements in the List<T>.

Ejemplos

En el ejemplo siguiente se muestra el método RemoveRange y otros métodos de la clase List<T> que actúan en intervalos.The following example demonstrates the RemoveRange method and various other methods of the List<T> class that act on ranges. Una vez creada y modificada la lista, se usa el método RemoveRange para quitar dos elementos de la lista, comenzando en la ubicación de índice 2.After the list has been created and modified, the RemoveRange method is used to remove two elements from the list, beginning at index location 2.

using namespace System;
using namespace System::Collections::Generic;

void main()
{
    array<String^>^ input = { "Brachiosaurus", 
                              "Amargasaurus", 
                              "Mamenchisaurus" };

    List<String^>^ dinosaurs = 
        gcnew List<String^>((IEnumerable<String^>^) input);

    Console::WriteLine("\nCapacity: {0}", dinosaurs->Capacity);

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    Console::WriteLine("\nAddRange(dinosaurs)");
    dinosaurs->AddRange(dinosaurs);

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    Console::WriteLine("\nRemoveRange(2, 2)");
    dinosaurs->RemoveRange(2, 2);

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    input = gcnew array<String^> { "Tyrannosaurus", 
                                   "Deinonychus", 
                                   "Velociraptor"};

    Console::WriteLine("\nInsertRange(3, (IEnumerable<String^>^) input)");
    dinosaurs->InsertRange(3, (IEnumerable<String^>^) input);

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    Console::WriteLine("\noutput = dinosaurs->GetRange(2, 3)->ToArray()");
    array<String^>^ output = dinosaurs->GetRange(2, 3)->ToArray();
        
    Console::WriteLine();
    for each(String^ dinosaur in output )
    {
        Console::WriteLine(dinosaur);
    }
}

/* This code example produces the following output:

Capacity: 3

Brachiosaurus
Amargasaurus
Mamenchisaurus

AddRange(dinosaurs)

Brachiosaurus
Amargasaurus
Mamenchisaurus
Brachiosaurus
Amargasaurus
Mamenchisaurus

RemoveRange(2, 2)

Brachiosaurus
Amargasaurus
Amargasaurus
Mamenchisaurus

InsertRange(3, (IEnumerable<String^>^) input)

Brachiosaurus
Amargasaurus
Amargasaurus
Tyrannosaurus
Deinonychus
Velociraptor
Mamenchisaurus

output = dinosaurs->GetRange(2, 3)->ToArray()

Amargasaurus
Tyrannosaurus
Deinonychus
 */
using System;
using System.Collections.Generic;

public class Example
{
    public static void Main()
    {
        string[] input = { "Brachiosaurus", 
                           "Amargasaurus", 
                           "Mamenchisaurus" };

        List<string> dinosaurs = new List<string>(input);

        Console.WriteLine("\nCapacity: {0}", dinosaurs.Capacity);

        Console.WriteLine();
        foreach( string dinosaur in dinosaurs )
        {
            Console.WriteLine(dinosaur);
        }

        Console.WriteLine("\nAddRange(dinosaurs)");
        dinosaurs.AddRange(dinosaurs);

        Console.WriteLine();
        foreach( string dinosaur in dinosaurs )
        {
            Console.WriteLine(dinosaur);
        }

        Console.WriteLine("\nRemoveRange(2, 2)");
        dinosaurs.RemoveRange(2, 2);

        Console.WriteLine();
        foreach( string dinosaur in dinosaurs )
        {
            Console.WriteLine(dinosaur);
        }

        input = new string[] { "Tyrannosaurus", 
                               "Deinonychus", 
                               "Velociraptor"};

        Console.WriteLine("\nInsertRange(3, input)");
        dinosaurs.InsertRange(3, input);

        Console.WriteLine();
        foreach( string dinosaur in dinosaurs )
        {
            Console.WriteLine(dinosaur);
        }

        Console.WriteLine("\noutput = dinosaurs.GetRange(2, 3).ToArray()");
        string[] output = dinosaurs.GetRange(2, 3).ToArray();
        
        Console.WriteLine();
        foreach( string dinosaur in output )
        {
            Console.WriteLine(dinosaur);
        }
    }
}

/* This code example produces the following output:

Capacity: 3

Brachiosaurus
Amargasaurus
Mamenchisaurus

AddRange(dinosaurs)

Brachiosaurus
Amargasaurus
Mamenchisaurus
Brachiosaurus
Amargasaurus
Mamenchisaurus

RemoveRange(2, 2)

Brachiosaurus
Amargasaurus
Amargasaurus
Mamenchisaurus

InsertRange(3, input)

Brachiosaurus
Amargasaurus
Amargasaurus
Tyrannosaurus
Deinonychus
Velociraptor
Mamenchisaurus

output = dinosaurs.GetRange(2, 3).ToArray()

Amargasaurus
Tyrannosaurus
Deinonychus
 */
Imports System.Collections.Generic

Public Class Example

    Public Shared Sub Main()

        Dim input() As String = { "Brachiosaurus", _
                                  "Amargasaurus", _
                                  "Mamenchisaurus" }

        Dim dinosaurs As New List(Of String)(input)

        Console.WriteLine(vbLf & "Capacity: {0}", dinosaurs.Capacity)

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        Console.WriteLine(vbLf & "AddRange(dinosaurs)")
        dinosaurs.AddRange(dinosaurs)

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        Console.WriteLine(vbLf & "RemoveRange(2, 2)")
        dinosaurs.RemoveRange(2, 2)

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        input = New String() { "Tyrannosaurus", _
                               "Deinonychus", _
                               "Velociraptor" }

        Console.WriteLine(vbLf & "InsertRange(3, input)")
        dinosaurs.InsertRange(3, input)

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        Console.WriteLine(vbLf & "output = dinosaurs.GetRange(2, 3).ToArray")
        Dim output() As String = dinosaurs.GetRange(2, 3).ToArray()
        
        Console.WriteLine()
        For Each dinosaur As String In output
            Console.WriteLine(dinosaur)
        Next

    End Sub
End Class

' This code example produces the following output:
'
'Capacity: 3
'
'Brachiosaurus
'Amargasaurus
'Mamenchisaurus
'
'AddRange(dinosaurs)
'
'Brachiosaurus
'Amargasaurus
'Mamenchisaurus
'Brachiosaurus
'Amargasaurus
'Mamenchisaurus
'
'RemoveRange(2, 2)
'
'Brachiosaurus
'Amargasaurus
'Amargasaurus
'Mamenchisaurus
'
'InsertRange(3, input)
'
'Brachiosaurus
'Amargasaurus
'Amargasaurus
'Tyrannosaurus
'Deinonychus
'Velociraptor
'Mamenchisaurus
'
'output = dinosaurs.GetRange(2, 3).ToArray
'
'Amargasaurus
'Tyrannosaurus
'Deinonychus

Comentarios

Los elementos se quitan y todos los elementos que los siguen en el List<T> tienen los índices reducidos por count.The items are removed and all the elements following them in the List<T> have their indexes reduced by count.

Este método es una operación O (n), donde n es Count.This method is an O(n) operation, where n is Count.

Se aplica a

Consulte también: