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PrimarySelectionContextMenuProvider-Konstruktor

Initialisiert eine neue Instanz der PrimarySelectionContextMenuProvider-Klasse.

Namespace:  Microsoft.Windows.Design.Interaction
Assembly:  Microsoft.Windows.Design.Interaction (in Microsoft.Windows.Design.Interaction.dll)

Syntax

'Declaration
Protected Sub New
protected PrimarySelectionContextMenuProvider()
protected:
PrimarySelectionContextMenuProvider()
new : unit -> PrimarySelectionContextMenuProvider
protected function PrimarySelectionContextMenuProvider()

Hinweise

Verwenden Sie den Konstruktor, um die Elemente MenuAction und MenuGroup zu erstellen, die im Kontextmenü angezeigt werden.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie ein benutzerdefinierter Typ initialisiert wird, der von der PrimarySelectionContextMenuProvider-Klasse abgeleitet wird. Der abgeleitete Typ implementiert ein benutzerdefiniertes Kontextmenü, das die Background-Eigenschaft eines Steuerelements zur Entwurfszeit festlegt. Weitere Informationen finden Sie unter Exemplarische Vorgehensweise: Erstellen eines Menüanbieters.

' 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);
}

.NET Framework-Sicherheit

Siehe auch

Referenz

PrimarySelectionContextMenuProvider Klasse

Microsoft.Windows.Design.Interaction-Namespace

MenuGroup

MenuAction