ListViewItem.Selected Propiedad
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Obtiene o establece un valor que indica si el elemento está seleccionado.
public:
property bool Selected { bool get(); void set(bool value); };[System.ComponentModel.Browsable(false)]
public bool Selected { get; set; }[<System.ComponentModel.Browsable(false)>]
member this.Selected : bool with get, setPublic Property Selected As BooleanValor de propiedad
true si el elemento está seleccionado; en caso contrario, false.
- Atributos
Ejemplos
En el ejemplo de código siguiente se muestra cómo usar los ListView.Clear miembros y Selected . Para ejecutar el ejemplo, coloque el código siguiente en un formulario que contenga un ListView denominado y un Button, ubicado hacia la parte inferior del formulario, denominado Button1ListView1 . Llame al método desde el InitializeListView constructor Load o el método de control de eventos del formulario.
private:
void InitializeListView()
{
// Set up the inital values for the ListView and populate it.
this->ListView1 = gcnew ListView;
this->ListView1->Dock = DockStyle::Top;
this->ListView1->Location = System::Drawing::Point( 0, 0 );
this->ListView1->Size = System::Drawing::Size( 292, 130 );
this->ListView1->View = View::Details;
this->ListView1->FullRowSelect = true;
array<String^>^breakfast = {"Continental Breakfast","Pancakes and Sausage","Denver Omelet","Eggs & Bacon","Bagel & Cream Cheese"};
array<String^>^breakfastPrices = {"3.09","4.09","4.19","4.79","2.09"};
PopulateMenu( "Breakfast", breakfast, breakfastPrices );
}
void PopulateMenu( String^ meal, array<String^>^menuItems, array<String^>^menuPrices )
{
ColumnHeader^ columnHeader1 = gcnew ColumnHeader;
columnHeader1->Text = String::Concat( meal, " Choices" );
columnHeader1->TextAlign = HorizontalAlignment::Left;
columnHeader1->Width = 146;
ColumnHeader^ columnHeader2 = gcnew ColumnHeader;
columnHeader2->Text = "Price";
columnHeader2->TextAlign = HorizontalAlignment::Center;
columnHeader2->Width = 142;
this->ListView1->Columns->Add( columnHeader1 );
this->ListView1->Columns->Add( columnHeader2 );
for ( int count = 0; count < menuItems->Length; count++ )
{
ListViewItem^ listItem = gcnew ListViewItem( menuItems[ count ] );
listItem->SubItems->Add( menuPrices[ count ] );
ListView1->Items->Add( listItem );
}
// Use the Selected property to select the first item on
// the list.
ListView1->Focus();
ListView1->Items[ 0 ]->Selected = true;
}
void Button1_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
// Create new values for the ListView, clear the list,
// and repopulate it.
array<String^>^lunch = {"Hamburger","Grilled Cheese","Soup & Salad","Club Sandwich","Hotdog"};
array<String^>^lunchPrices = {"4.09","5.09","5.19","4.79","2.09"};
ListView1->Clear();
PopulateMenu( "Lunch", lunch, lunchPrices );
Button1->Enabled = false;
}
private void InitializeListView()
{
// Set up the inital values for the ListView and populate it.
this.ListView1 = new ListView();
this.ListView1.Dock = DockStyle.Top;
this.ListView1.Location = new System.Drawing.Point(0, 0);
this.ListView1.Size = new System.Drawing.Size(292, 130);
this.ListView1.View = View.Details;
this.ListView1.FullRowSelect = true;
string[] breakfast = new string[]{"Continental Breakfast",
"Pancakes and Sausage", "Denver Omelet", "Eggs & Bacon",
"Bagel & Cream Cheese"};
string[] breakfastPrices = new string[]{"3.09", "4.09",
"4.19", "4.79", "2.09"};
PopulateMenu("Breakfast", breakfast, breakfastPrices);
}
private void PopulateMenu(string meal,
string[] menuItems, string[] menuPrices)
{
ColumnHeader columnHeader1 = new ColumnHeader();
columnHeader1.Text = meal + " Choices";
columnHeader1.TextAlign = HorizontalAlignment.Left;
columnHeader1.Width = 146;
ColumnHeader columnHeader2 = new ColumnHeader();
columnHeader2.Text = "Price";
columnHeader2.TextAlign = HorizontalAlignment.Center;
columnHeader2.Width = 142;
this.ListView1.Columns.Add(columnHeader1);
this.ListView1.Columns.Add(columnHeader2);
for(int count=0; count < menuItems.Length; count++)
{
ListViewItem listItem =
new ListViewItem(menuItems[count]);
listItem.SubItems.Add(menuPrices[count]);
ListView1.Items.Add(listItem);
}
// Use the Selected property to select the first item on
// the list.
ListView1.Focus();
ListView1.Items[0].Selected = true;
}
private void Button1_Click(System.Object sender, System.EventArgs e)
{
// Create new values for the ListView, clear the list,
// and repopulate it.
string[] lunch = new string[]{"Hamburger", "Grilled Cheese",
"Soup & Salad", "Club Sandwich", "Hotdog"};
string[] lunchPrices = new string[]{"4.09", "5.09", "5.19",
"4.79", "2.09"};
ListView1.Clear();
PopulateMenu("Lunch", lunch, lunchPrices);
Button1.Enabled = false;
}
Private Sub InitializeListView()
' Set up the inital values for the ListView and populate it.
Me.ListView1 = New ListView
Me.ListView1.Dock = DockStyle.Top
Me.ListView1.Location = New System.Drawing.Point(0, 0)
Me.ListView1.Size = New System.Drawing.Size(292, 130)
Me.ListView1.View = View.Details
Me.ListView1.FullRowSelect = True
Dim breakfast() As String = New String() {"Continental Breakfast", "Pancakes and Sausage", _
"Denver Omelet", "Eggs & Bacon", "Bagel & Cream Cheese"}
Dim breakfastPrices() As String = New String() {"3.09", "4.09", "4.19", _
"4.79", "2.09"}
PopulateMenu("Breakfast", breakfast, breakfastPrices)
End Sub
Private Sub PopulateMenu(ByVal meal As String, _
ByVal menuItems() As String, ByVal menuPrices() As String)
Dim columnHeader1 As New ColumnHeader
With columnHeader1
.Text = meal & " Choices"
.TextAlign = HorizontalAlignment.Left
.Width = 146
End With
Dim columnHeader2 As New ColumnHeader
With columnHeader2
.Text = "Price"
.TextAlign = HorizontalAlignment.Center
.Width = 142
End With
Me.ListView1.Columns.Add(columnHeader1)
Me.ListView1.Columns.Add(columnHeader2)
Dim count As Integer
For count = 0 To menuItems.Length - 1
Dim listItem As New ListViewItem(menuItems(count))
listItem.SubItems.Add(menuPrices(count))
ListView1.Items.Add(listItem)
Next
' Use the Selected property to select the first item on
' the list.
ListView1.Focus()
ListView1.Items(0).Selected = True
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
' Create new values for the ListView, clear the list,
' and repopulate it.
Dim lunch() As String = New String() {"Hamburger", _
"Grilled Cheese", "Soup & Salad", "Club Sandwich", "Hotdog"}
Dim lunchPrices() As String = New String() {"4.09", "5.09", _
"5.19", "4.79", "2.09"}
ListView1.Clear()
PopulateMenu("Lunch", lunch, lunchPrices)
Button1.Enabled = False
End Sub
Comentarios
Si la MultiSelect propiedad del control en el ListView que se encuentra el elemento se establece trueen , al establecer el valor de esta propiedad se agrega o se quita el elemento del conjunto de elementos seleccionados. Si la MultiSelect propiedad está establecida falseen , al establecer el valor de esta propiedad para seleccionar un elemento se cancela automáticamente la selección de cualquier otro elemento del ListView control. Puede usar esta propiedad para determinar si un elemento está seleccionado o para seleccionar un elemento en tiempo de ejecución. Puede tener acceso a todos los elementos seleccionados en un ListView control mediante la ListView.SelectedItems propiedad .
Nota:
Los elementos aparecen seleccionados solo cuando el ListView control tiene el foco. Para seleccionar elementos en respuesta a una acción de usuario, como un clic de botón, asegúrese de llamar al Focus método además de establecer esta propiedad.
