PrimarySelectionContextMenuProvider (Constructor)
Inicializa una nueva instancia de la clase PrimarySelectionContextMenuProvider.
Espacio de nombres: Microsoft.Windows.Design.Interaction
Ensamblado: Microsoft.Windows.Design.Interaction (en Microsoft.Windows.Design.Interaction.dll)
Sintaxis
'Declaración
Protected Sub New
protected PrimarySelectionContextMenuProvider()
protected:
PrimarySelectionContextMenuProvider()
new : unit -> PrimarySelectionContextMenuProvider
protected function PrimarySelectionContextMenuProvider()
Comentarios
Utilice el constructor para crear los elementos MenuAction y MenuGroup que se muestran en el menú contextual.
Ejemplos
En el siguiente ejemplo de código se muestra cómo inicializar un tipo personalizado, que se deriva de la clase PrimarySelectionContextMenuProvider. El tipo derivado implementa un menú contextual personalizado, que establece la propiedad Background de un control en tiempo de diseño. Para obtener más información, vea Tutorial: Crear un proveedor de menús.
' The provider's constructor sets up the MenuAction objects
' and the the MenuGroup which holds them.
Public Sub New()
' Set up the MenuAction which sets the control's
' background to Blue.
setBackgroundToBlueMenuAction = New MenuAction("Blue")
setBackgroundToBlueMenuAction.Checkable = True
AddHandler setBackgroundToBlueMenuAction.Execute, AddressOf SetBackgroundToBlue_Execute
' Set up the MenuAction which sets the control's
' background to its default value.
clearBackgroundMenuAction = New MenuAction("Cleared")
clearBackgroundMenuAction.Checkable = True
AddHandler clearBackgroundMenuAction.Execute, AddressOf ClearBackground_Execute
' Set up the MenuGroup which holds the MenuAction items.
Dim backgroundFlyoutGroup As New MenuGroup("SetBackgroundsGroup", "Set Background")
' If HasDropDown is false, the group appears inline,
' instead of as a flyout. Set to true.
backgroundFlyoutGroup.HasDropDown = True
backgroundFlyoutGroup.Items.Add(setBackgroundToBlueMenuAction)
backgroundFlyoutGroup.Items.Add(clearBackgroundMenuAction)
Me.Items.Add(backgroundFlyoutGroup)
' The UpdateItemStatus event is raised immediately before
' this provider shows its tabs, which provides the opportunity
' to set states.
AddHandler UpdateItemStatus, AddressOf CustomContextMenuProvider_UpdateItemStatus
End Sub
// The provider's constructor sets up the MenuAction objects
// and the the MenuGroup which holds them.
public CustomContextMenuProvider()
{
// Set up the MenuAction which sets the control's
// background to Blue.
setBackgroundToBlueMenuAction = new MenuAction("Blue");
setBackgroundToBlueMenuAction.Checkable = true;
setBackgroundToBlueMenuAction.Execute +=
new EventHandler<MenuActionEventArgs>(SetBackgroundToBlue_Execute);
// Set up the MenuAction which sets the control's
// background to its default value.
clearBackgroundMenuAction = new MenuAction("Cleared");
clearBackgroundMenuAction.Checkable = true;
clearBackgroundMenuAction.Execute +=
new EventHandler<MenuActionEventArgs>(ClearBackground_Execute);
// Set up the MenuGroup which holds the MenuAction items.
MenuGroup backgroundFlyoutGroup =
new MenuGroup("SetBackgroundsGroup", "Set Background");
// If HasDropDown is false, the group appears inline,
// instead of as a flyout. Set to true.
backgroundFlyoutGroup.HasDropDown = true;
backgroundFlyoutGroup.Items.Add(setBackgroundToBlueMenuAction);
backgroundFlyoutGroup.Items.Add(clearBackgroundMenuAction);
this.Items.Add(backgroundFlyoutGroup);
// The UpdateItemStatus event is raised immediately before
// this provider shows its tabs, which provides the opportunity
// to set states.
UpdateItemStatus +=
new EventHandler<MenuActionEventArgs>(
CustomContextMenuProvider_UpdateItemStatus);
}
Seguridad de .NET Framework
- Plena confianza para el llamador inmediato. Un código de confianza parcial no puede utilizar este miembro. Para obtener más información, vea Utilizar bibliotecas de código que no es de plena confianza.
Vea también
Referencia
PrimarySelectionContextMenuProvider Clase