SelectionChangedEventArgs SelectionChangedEventArgs SelectionChangedEventArgs SelectionChangedEventArgs Class

Definición

Proporciona datos para el evento SelectionChanged.Provides data for the SelectionChanged event.

public ref class SelectionChangedEventArgs : System::Windows::RoutedEventArgs
public class SelectionChangedEventArgs : System.Windows.RoutedEventArgs
type SelectionChangedEventArgs = class
    inherit RoutedEventArgs
Public Class SelectionChangedEventArgs
Inherits RoutedEventArgs
Herencia
SelectionChangedEventArgsSelectionChangedEventArgsSelectionChangedEventArgsSelectionChangedEventArgs

Ejemplos

En el ejemplo siguiente se crea un ListBox y se suscribe a la SelectionChanged eventos.The following example creates a ListBox and subscribes to the SelectionChanged event. Usa el SelectionChangedEventArgs para encontrar el elemento seleccionado en el ListBox.It uses the SelectionChangedEventArgs to find the selected item in the ListBox.

<WrapPanel Width="500" Orientation="Horizontal" Name="rectanglesPanel">
  <WrapPanel.Resources>
    <Style TargetType="Rectangle">
      <Setter Property="Height" Value="20"/>
      <Setter Property="Width" Value="20"/>
      <Setter Property="Margin" Value="5"/>
    </Style>
  </WrapPanel.Resources>
</WrapPanel>

<ListBox Name="myListBox" HorizontalAlignment="Left" SelectionMode="Extended" 
      Width="265" Height="55" Background="HoneyDew" SelectionChanged="myListBox_SelectionChanged"
      ItemsSource="{Binding Source={StaticResource Colors}}" IsSynchronizedWithCurrentItem="true">
</ListBox>

void myListBox_SelectionChanged(object sender, SelectionChangedEventArgs args)
{

    BrushConverter converter = new BrushConverter();

    // Show Rectangles that are the selected colors.
    foreach (string color in args.AddedItems)
    {
        if (GetRectangle(color) == null)
        {
            Rectangle aRect = new Rectangle();
            aRect.Fill = (Brush) converter.ConvertFrom(color);
            aRect.Tag = color;
            rectanglesPanel.Children.Add(aRect);
        }

    }

    // Remove the Rectangles that are the unselected colors.
    foreach (string color in args.RemovedItems)
    {
        FrameworkElement removedItem = GetRectangle(color);
        if (removedItem != null)
        {
            rectanglesPanel.Children.Remove(removedItem);
        }
    }
}

FrameworkElement GetRectangle(string color)
{
    foreach (FrameworkElement rect in rectanglesPanel.Children)
    {
        if (rect.Tag.ToString() == color)
            return rect;
    }

    return null;
}
Private Sub myListBox_SelectionChanged(ByVal sender As Object, ByVal args As SelectionChangedEventArgs)

    Dim converter As BrushConverter = New BrushConverter()
    Dim color As String

    ' Show Rectangles that are the selected colors.
    For Each color In args.AddedItems

        If GetRectangle(color) Is Nothing Then
            Dim aRect As Rectangle = New Rectangle()
            aRect.Fill = CType(converter.ConvertFrom(color), Brush)
            aRect.Tag = color
            rectanglesPanel.Children.Add(aRect)
        End If

    Next

    ' Remove the Rectangles that are the unselected colors.
    For Each color In args.RemovedItems

        Dim removedItem As FrameworkElement = GetRectangle(color)
        If Not removedItem Is Nothing Then
            rectanglesPanel.Children.Remove(removedItem)
        End If

    Next

End Sub

Private Function GetRectangle(ByVal color As String) As FrameworkElement
    Dim rect As FrameworkElement
    For Each rect In rectanglesPanel.Children
        If rect.Tag.ToString() = color Then
            Return rect
        End If
    Next

    Return Nothing
End Function

Constructores

SelectionChangedEventArgs(RoutedEvent, IList, IList) SelectionChangedEventArgs(RoutedEvent, IList, IList) SelectionChangedEventArgs(RoutedEvent, IList, IList) SelectionChangedEventArgs(RoutedEvent, IList, IList)

Inicializa una nueva instancia de la clase SelectionChangedEventArgs.Initializes a new instance of the SelectionChangedEventArgs class.

Propiedades

AddedItems AddedItems AddedItems AddedItems

Obtiene una lista que contiene los elementos que se seleccionaron.Gets a list that contains the items that were selected.

Handled Handled Handled Handled

Obtiene o establece un valor que indica el estado actual del control de eventos para un evento enrutado cuando recorre la ruta.Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route.

(Inherited from RoutedEventArgs)
OriginalSource OriginalSource OriginalSource OriginalSource

Obtiene el origen inicial de los informes determinado por pruebas de acceso puro, antes de que una clase primaria realice posibles ajustes de Source.Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class.

(Inherited from RoutedEventArgs)
RemovedItems RemovedItems RemovedItems RemovedItems

Obtiene una lista que contiene los elementos cuya selección se anuló.Gets a list that contains the items that were unselected.

RoutedEvent RoutedEvent RoutedEvent RoutedEvent

Obtiene o establece el RoutedEvent asociado a esta instancia RoutedEventArgs.Gets or sets the RoutedEvent associated with this RoutedEventArgs instance.

(Inherited from RoutedEventArgs)
Source Source Source Source

Obtiene o establece una referencia al objeto que generó el evento.Gets or sets a reference to the object that raised the event.

(Inherited from RoutedEventArgs)

Métodos

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

Determina si el objeto especificado es igual al objeto actual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Sirve como la función hash predeterminada.Serves as the default hash function.

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

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Inherited from Object)
InvokeEventHandler(Delegate, Object) InvokeEventHandler(Delegate, Object) InvokeEventHandler(Delegate, Object) InvokeEventHandler(Delegate, Object)

Realiza la conversión de tipos adecuada para llamar al delegado SelectionChangedEventHandler con seguridad de tipos para el evento SelectionChanged.Performs the proper type casting to call the type-safe SelectionChangedEventHandler delegate for the SelectionChanged event.

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

Crea una copia superficial del Object actual.Creates a shallow copy of the current Object.

(Inherited from Object)
OnSetSource(Object) OnSetSource(Object) OnSetSource(Object) OnSetSource(Object)

Cuando se invalida en una clase derivada, proporciona una entrada de devolución de llamada de notificación cada vez que seleccione el valor de la Source propiedad de los cambios de la instancia.When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes.

(Inherited from RoutedEventArgs)
ToString() ToString() ToString() ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Inherited from Object)

Se aplica a

Consulte también: