ListView.SelectedIndices ListView.SelectedIndices ListView.SelectedIndices ListView.SelectedIndices Property

Définition

Obtient les index des éléments sélectionnés dans le contrôle.Gets the indexes of the selected items in the control.

public:
 property System::Windows::Forms::ListView::SelectedIndexCollection ^ SelectedIndices { System::Windows::Forms::ListView::SelectedIndexCollection ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.ListView.SelectedIndexCollection SelectedIndices { get; }
member this.SelectedIndices : System.Windows.Forms.ListView.SelectedIndexCollection
Public ReadOnly Property SelectedIndices As ListView.SelectedIndexCollection

Valeur de propriété

ListView.SelectedIndexCollection qui contient les index des éléments sélectionnés.A ListView.SelectedIndexCollection that contains the indexes of the selected items. Si aucun élément n'est sélectionné, un ListView.SelectedIndexCollection vide est retourné.If no items are currently selected, an empty ListView.SelectedIndexCollection is returned.

Exemples

L’exemple de code suivant illustre l' SelectedIndicesutilisation SelectedIndexChangeddes HeaderStyle membres, et et ListView.SelectedIndexCollection de la classe.The following code example demonstrates using the SelectedIndices, SelectedIndexChanged, and HeaderStyle members and the ListView.SelectedIndexCollection class. Pour exécuter cet exemple, collez le code suivant dans un formulaire qui contient ListView un objet ListView1 nommé et TextBox un TextBox1nommé.To run this example, paste the following code into a form that contains a ListView object named ListView1 and a TextBox named TextBox1. Appelez la InitializeListView méthode à partir du constructeur ou Load de la méthode du formulaire.Call the InitializeListView method from the form's constructor or Load method. Cet exemple requiert que le gestionnaire d’événements soit correctement associé SelectedIndexChanged à l’événement.This example requires 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

Remarques

La SelectedIndices propriété ne contient pas d’index si la propriété est accessible avant la création ListView du handle, ce qui se produit généralement lorsque ListView le est initialement chargé pour l’affichage dans le formulaire.The SelectedIndices property will not contain any indexes if the property is accessed before the ListView handle is created, which typically occurs when the ListView is initially loaded for display in the form. Vous pouvez vérifier si le handle est créé avec la IsHandleCreated propriété.You can check to see if the handle is created with the IsHandleCreated property. Lorsque la MultiSelect propriété a la truevaleur, cette propriété retourne une collection contenant les index de tous les éléments sélectionnés dans le ListView.When the MultiSelect property is set to true, this property returns a collection containing the indexes of all items that are selected in the ListView. Pour une sélection ListViewunique, cette propriété retourne une collection contenant un élément unique contenant l’index du seul élément sélectionné ListViewdans.For a single-selection ListView, this property returns a collection containing a single element containing the index of the only selected item in the ListView. Pour plus d’informations sur les tâches qui peuvent être effectuées avec les éléments de la collection, ListView.SelectedIndexCollectionconsultez.For more information on the tasks that can be performed with the items in the collection, see ListView.SelectedIndexCollection.

Si vous souhaitez obtenir une collection des éléments sélectionnés dans le ListView contrôle, à la place de la position d’index des éléments sélectionnés, utilisez la SelectedItems propriété.If you want to obtain a collection of the items that are selected in the ListView control, instead of the index positions of the items that are selected, use the SelectedItems property.

S’applique à

Voir aussi