ListView.SelectedIndexCollection ListView.SelectedIndexCollection ListView.SelectedIndexCollection ListView.SelectedIndexCollection Class

Definição

Representa a coleção que contém os índices para os itens selecionados em um controle ListView.Represents the collection that contains the indexes to the selected items in a ListView control.

public: ref class ListView::SelectedIndexCollection : System::Collections::IList
[System.ComponentModel.ListBindable(false)]
public class ListView.SelectedIndexCollection : System.Collections.IList
type ListView.SelectedIndexCollection = class
    interface IList
    interface ICollection
    interface IEnumerable
Public Class ListView.SelectedIndexCollection
Implements IList
Herança
ListView.SelectedIndexCollectionListView.SelectedIndexCollectionListView.SelectedIndexCollectionListView.SelectedIndexCollection
Atributos
Implementações

Exemplos

O exemplo de código a seguir demonstra como usar SelectedIndicesos SelectedIndexChangedMembros, HeaderStyle , e e ListView.SelectedIndexCollection a classe.The following code example demonstrates how to use the SelectedIndices, SelectedIndexChanged, and HeaderStyle members and the ListView.SelectedIndexCollection class. Para executar este exemplo, Cole o código a seguir em um formulário que contém ListView um objeto ListView1 chamado e TextBox um TextBox1denominado.To run this example, paste the following code into a form that contains a ListView object named ListView1 and a TextBox named TextBox1. Chame o InitializeListView método do construtor do formulário ou Load do manipulador de eventos.Call the InitializeListView method from the form's constructor or Load event handler. Este exemplo requer que o manipulador de eventos esteja corretamente associado SelectedIndexChanged ao evento.This example requires that the event handler is correctly associated with the SelectedIndexChanged event.

// This method adds two columns to the ListView, setting the Text 
// and TextAlign, and Width properties of each ColumnHeader.  The 
// HeaderStyle property is set to NonClickable since the ColumnClick 
// event is not handled.  Finally the method adds ListViewItems and 
// SubItems to each column.
void InitializeListView()
{
   this->ListView1 = gcnew System::Windows::Forms::ListView;
   this->ListView1->BackColor = System::Drawing::SystemColors::Control;
   this->ListView1->Dock = System::Windows::Forms::DockStyle::Top;
   this->ListView1->Location = System::Drawing::Point( 0, 0 );
   this->ListView1->Name = "ListView1";
   this->ListView1->Size = System::Drawing::Size( 292, 130 );
   this->ListView1->TabIndex = 0;
   this->ListView1->View = System::Windows::Forms::View::Details;
   this->ListView1->MultiSelect = true;
   this->ListView1->HideSelection = false;
   this->ListView1->HeaderStyle = ColumnHeaderStyle::Nonclickable;
   ColumnHeader^ columnHeader1 = gcnew ColumnHeader;
   columnHeader1->Text = "Breakfast Item";
   columnHeader1->TextAlign = HorizontalAlignment::Left;
   columnHeader1->Width = 146;
   ColumnHeader^ columnHeader2 = gcnew ColumnHeader;
   columnHeader2->Text = "Price Each";
   columnHeader2->TextAlign = HorizontalAlignment::Center;
   columnHeader2->Width = 142;
   this->ListView1->Columns->Add( columnHeader1 );
   this->ListView1->Columns->Add( columnHeader2 );
   array<String^>^foodList = {"Juice","Coffee","Cereal & Milk","Fruit Plate","Toast & Jelly","Bagel & Cream Cheese"};
   array<String^>^foodPrice = {"1.09","1.09","2.19","2.49","1.49","1.49"};
   for ( int count = 0; count < foodList->Length; count++ )
   {
      ListViewItem^ listItem = gcnew ListViewItem( foodList[ count ] );
      listItem->SubItems->Add( foodPrice[ count ] );
      ListView1->Items->Add( listItem );

   }
   this->Controls->Add( ListView1 );
}
  // This method adds two columns to the ListView, setting the Text 
  // and TextAlign, and Width properties of each ColumnHeader.  The 
  // HeaderStyle property is set to NonClickable since the ColumnClick 
  // event is not handled.  Finally the method adds ListViewItems and 
  // SubItems to each column.
  private void InitializeListView()
  {
      this.ListView1 = new System.Windows.Forms.ListView();
      this.ListView1.BackColor = System.Drawing.SystemColors.Control;
      this.ListView1.Dock = System.Windows.Forms.DockStyle.Top;
      this.ListView1.Location = new System.Drawing.Point(0, 0);
      this.ListView1.Name = "ListView1";
      this.ListView1.Size = new System.Drawing.Size(292, 130);
      this.ListView1.TabIndex = 0;
      this.ListView1.View = System.Windows.Forms.View.Details;
      this.ListView1.MultiSelect = true;
      this.ListView1.HideSelection = false;
      this.ListView1.HeaderStyle = ColumnHeaderStyle.Nonclickable;
      
      ColumnHeader columnHeader1 = new ColumnHeader();
      columnHeader1.Text = "Breakfast Item";
      columnHeader1.TextAlign = HorizontalAlignment.Left;
      columnHeader1.Width = 146;

      ColumnHeader columnHeader2 = new ColumnHeader();
      columnHeader2.Text = "Price Each";
      columnHeader2.TextAlign = HorizontalAlignment.Center;
      columnHeader2.Width = 142;

      this.ListView1.Columns.Add(columnHeader1);
      this.ListView1.Columns.Add(columnHeader2);

      string[] foodList = new string[]{"Juice", "Coffee", 
          "Cereal & Milk", "Fruit Plate", "Toast & Jelly", 
          "Bagel & Cream Cheese"};
      string[] foodPrice = new string[]{"1.09", "1.09", "2.19", 
          "2.49", "1.49", "1.49"};
      
      for(int count=0; count < foodList.Length; count++)
      {
          ListViewItem listItem = new ListViewItem(foodList[count]);
          listItem.SubItems.Add(foodPrice[count]);
          ListView1.Items.Add(listItem);
      }
      this.Controls.Add(ListView1);
  }
  
' This method adds two columns to the ListView, setting the Text 
' and TextAlign, and Width properties of each ColumnHeader.  The 
' HeaderStyle property is set to NonClickable since the ColumnClick 
' event is not handled.  Finally the method adds ListViewItems and 
' SubItems to each column.
Private Sub InitializeListView()
    Me.ListView1 = New System.Windows.Forms.ListView
    Me.ListView1.BackColor = System.Drawing.SystemColors.Control
    Me.ListView1.Dock = System.Windows.Forms.DockStyle.Top
    Me.ListView1.Location = New System.Drawing.Point(0, 0)
    Me.ListView1.Name = "ListView1"
    Me.ListView1.Size = New System.Drawing.Size(292, 130)
    Me.ListView1.TabIndex = 0
    Me.ListView1.View = System.Windows.Forms.View.Details
    Me.ListView1.MultiSelect = True
    Me.ListView1.HideSelection = False
    ListView1.HeaderStyle = ColumnHeaderStyle.Nonclickable
    Dim columnHeader1 As New ColumnHeader
    With columnHeader1
        .Text = "Breakfast Item"
        .TextAlign = HorizontalAlignment.Left
        .Width = 146
    End With
    Dim columnHeader2 As New ColumnHeader
    With columnHeader2
        .Text = "Price Each"
        .TextAlign = HorizontalAlignment.Center
        .Width = 142
    End With

    Me.ListView1.Columns.Add(columnHeader1)
    Me.ListView1.Columns.Add(columnHeader2)
    Dim foodList() As String = New String() {"Juice", "Coffee", _
        "Cereal & Milk", "Fruit Plate", "Toast & Jelly", _
        "Bagel & Cream Cheese"}
    Dim foodPrice() As String = New String() {"1.09", "1.09", _
        "2.19", "2.49", "1.49", "1.49"}
    Dim count As Integer
    For count = 0 To foodList.Length - 1
        Dim listItem As New ListViewItem(foodList(count))
        listItem.SubItems.Add(foodPrice(count))
        ListView1.Items.Add(listItem)
    Next
    Me.Controls.Add(Me.ListView1)
End Sub
// Uses the SelectedIndices property to retrieve and tally the  
// price of the selected menu items.
void ListView1_SelectedIndexChanged_UsingIndices( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   ListView::SelectedIndexCollection^ indexes = this->ListView1->SelectedIndices;
   double price = 0.0;
   System::Collections::IEnumerator^ myEnum1 = indexes->GetEnumerator();
   while ( myEnum1->MoveNext() )
   {
      int index = safe_cast<int>(myEnum1->Current);
      price += Double::Parse( this->ListView1->Items[ index ]->SubItems[ 1 ]->Text );
   }

   
   // Output the price to TextBox1.
   TextBox1->Text = price.ToString();
}
// Uses the SelectedIndices property to retrieve and tally the  
// price of the selected menu items.
private void ListView1_SelectedIndexChanged_UsingIndices(
    object sender, System.EventArgs e)
{

    ListView.SelectedIndexCollection indexes = 
        this.ListView1.SelectedIndices;
    
    double price = 0.0;
    foreach ( int index in indexes )
    {
        price += Double.Parse(
            this.ListView1.Items[index].SubItems[1].Text);
    }

    // Output the price to TextBox1.
    TextBox1.Text =  price.ToString();
}
' Uses the SelectedIndices property to retrieve and tally the price of  
' the selected menu items.
Private Sub ListView1_SelectedIndexChanged_UsingIndices _
    (ByVal sender As Object, ByVal e As System.EventArgs) _
    Handles ListView1.SelectedIndexChanged

    Dim indexes As ListView.SelectedIndexCollection = _
        Me.ListView1.SelectedIndices
    Dim index As Integer
    Dim price As Double = 0.0
    For Each index In indexes
        price += Double.Parse(Me.ListView1.Items(index).SubItems(1).Text)
    Next

    ' Output the price to TextBox1.
    TextBox1.Text = CType(price, String)
End Sub

Comentários

Um ListView.SelectedIndexCollection armazena os índices para os itens selecionados em um ListView controle.A ListView.SelectedIndexCollection stores the indexes to the selected items in a ListView control. Os índices armazenados no ListView.SelectedIndexCollection são posições de índice dentro do. ListView.ListViewItemCollectionThe indexes stored in the ListView.SelectedIndexCollection are index positions within the ListView.ListViewItemCollection. O ListView.ListViewItemCollection armazena todos os itens exibidos ListView no controle.The ListView.ListViewItemCollection stores all items displayed in the ListView control.

A tabela a seguir mostra um exemplo de como ListView.ListViewItemCollection o armazena os itens ListView do e mostra seus Estados de seleção em um ListViewexemplo.The following table shows an example of how the ListView.ListViewItemCollection stores the items of the ListView and shows their selection states in an example ListView.

ÍndiceIndex ItemItem Estado de seleção na ListViewSelection state in the ListView
00 Item1Item1 Não selecionadoUnselected
11 Item2Item2 SelecionadoSelected
22 Item3Item3 Não selecionadoUnselected
33 Item4Item4 SelecionadoSelected
44 Item5Item5 SelecionadoSelected

Com base no ListView.ListViewItemCollection exemplo na tabela anterior, a tabela a seguir demonstra como o ListView.SelectedIndexCollection seria exibido.Based on the ListView.ListViewItemCollection example in the previous table, the following table demonstrates how the ListView.SelectedIndexCollection would appear.

ÍndiceIndex Índice do item selecionado no ListViewItemCollectionIndex of selected item in the ListViewItemCollection
00 11
11 33
22 44

Você pode usar as propriedades e os métodos dessa classe para executar uma variedade de tarefas com a coleção.You can use the properties and methods of this class to perform a variety of tasks with the collection. O Contains método permite que você determine se uma posição de índice ListView.ListViewItemCollection do é um dos índices armazenados no ListView.SelectedIndexCollection.The Contains method enables you to determine whether an index position from the ListView.ListViewItemCollection is one of the indexes stored in the ListView.SelectedIndexCollection. Depois de saber que o item está na coleção, você pode usar o IndexOf método para determinar a posição do índice ListView.SelectedIndexCollectionno.Once you know that the item is in the collection, you can use the IndexOf method to determine the position of the index in the ListView.SelectedIndexCollection.

Construtores

ListView.SelectedIndexCollection(ListView) ListView.SelectedIndexCollection(ListView) ListView.SelectedIndexCollection(ListView) ListView.SelectedIndexCollection(ListView)

Inicializa uma nova instância da classe ListView.SelectedIndexCollection.Initializes a new instance of the ListView.SelectedIndexCollection class.

Propriedades

Count Count Count Count

Obtém o número de itens na coleção.Gets the number of items in the collection.

IsReadOnly IsReadOnly IsReadOnly IsReadOnly

Obtém um valor que indica se a coleção é somente leitura.Gets a value indicating whether the collection is read-only.

Item[Int32] Item[Int32] Item[Int32] Item[Int32]

Obtém o valor do índice especificado nesta coleção.Gets the index value at the specified index within the collection.

Métodos

Add(Int32) Add(Int32) Add(Int32) Add(Int32)

Adiciona o item no índice especificado na matriz Items à coleção.Adds the item at the specified index in the Items array to the collection.

Clear() Clear() Clear() Clear()

Limpa os itens na coleção.Clears the items in the collection.

Contains(Int32) Contains(Int32) Contains(Int32) Contains(Int32)

Determina se o índice especificado está localizado na coleção.Determines whether the specified index is located in the collection.

CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32)

Copia toda a coleção em uma matriz existente de um local especificado na matriz.Copies the entire collection into an existing array at a specified location within the array.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina se o objeto especificado é igual ao objeto atual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()

Retorna um enumerador que pode ser usado para iterar pela coleção do índice selecionada.Returns an enumerator that can be used to iterate through the selected index collection.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serve como a função de hash padrão.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Obtém o Type da instância atual.Gets the Type of the current instance.

(Inherited from Object)
IndexOf(Int32) IndexOf(Int32) IndexOf(Int32) IndexOf(Int32)

Retorna o índice dentro do ListView.SelectedIndexCollection do índice especificado do ListView.ListViewItemCollection do controle ListView.Returns the index within the ListView.SelectedIndexCollection of the specified index from the ListView.ListViewItemCollection of the ListView control.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Cria uma cópia superficial do Object atual.Creates a shallow copy of the current Object.

(Inherited from Object)
Remove(Int32) Remove(Int32) Remove(Int32) Remove(Int32)

Remove o item no índice especificado na coleção Items da ListView.SelectedIndexCollection.Removes the item at the specified index in the Items collection from the ListView.SelectedIndexCollection.

ToString() ToString() ToString() ToString()

Retorna uma cadeia de caracteres que representa o objeto atual.Returns a string that represents the current object.

(Inherited from Object)

Implantações explícitas de interface

ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized

Obtém um valor que indica se o acesso à coleção é sincronizado (thread-safe).Gets a value indicating whether access to the collection is synchronized (thread safe).

ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot

Obtém um objeto que pode ser usado para sincronizar o acesso à coleção de controels.Gets an object that can be used to synchronize access to the collection of controls.

IList.Add(Object) IList.Add(Object) IList.Add(Object) IList.Add(Object)

Adiciona um item à coleção.Adds an item to the collection.

IList.Clear() IList.Clear() IList.Clear() IList.Clear()

Remove todos os itens da coleção.Removes all items from the collection.

IList.Contains(Object) IList.Contains(Object) IList.Contains(Object) IList.Contains(Object)

Determina se o item especificado está localizado na coleção.Determines whether the specified item is located in the collection.

IList.IndexOf(Object) IList.IndexOf(Object) IList.IndexOf(Object) IList.IndexOf(Object)

Retorna o índice na ListView.SelectedIndexCollection.Returns the index in the ListView.SelectedIndexCollection. O ListView.SelectedIndexCollection contém os índices dos itens selecionados no ListView.ListViewItemCollection do controle ListView.The ListView.SelectedIndexCollection contains the indexes of selected items in the ListView.ListViewItemCollection of the ListView control.

IList.Insert(Int32, Object) IList.Insert(Int32, Object) IList.Insert(Int32, Object) IList.Insert(Int32, Object)

Insere um item na coleção em um índice especificado.Inserts an item into the collection at a specified index.

IList.IsFixedSize IList.IsFixedSize IList.IsFixedSize IList.IsFixedSize

Obtém um valor que indica se o ListView.SelectedIndexCollection tem um tamanho fixo.Gets a value indicating whether the ListView.SelectedIndexCollection has a fixed size.

IList.Item[Int32] IList.Item[Int32] IList.Item[Int32] IList.Item[Int32]

Obtém ou define um objeto na coleção.Gets or sets an object in the collection.

IList.Remove(Object) IList.Remove(Object) IList.Remove(Object) IList.Remove(Object)

Remove a primeira ocorrência de um item especificado da coleção.Removes the first occurrence of a specified item from the collection.

IList.RemoveAt(Int32) IList.RemoveAt(Int32) IList.RemoveAt(Int32) IList.RemoveAt(Int32)

Remove um item da coleção em um índice especificado.Removes an item from the collection at a specified index.

Métodos de Extensão

Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable)

Converte os elementos de um IEnumerable para o tipo especificado.Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable)

Filtra os elementos de um IEnumerable com base em um tipo especificado.Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable)

Habilita a paralelização de uma consulta.Enables parallelization of a query.

AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable)

Converte um IEnumerable em um IQueryable.Converts an IEnumerable to an IQueryable.

Aplica-se a