AnnotationService.IsEnabled Eigenschaft

Definition

Namespace:

System.Windows.Annotations

Assembly:

PresentationFramework.dll

Ruft einen Wert ab, der angibt, ob AnnotationService aktiviert ist.

public:
 property bool IsEnabled { bool get(); };

public bool IsEnabled { get; }

member this.IsEnabled : bool

Public ReadOnly Property IsEnabled As Boolean

Eigenschaftswert

Boolean

Ist true, wenn die AnnotationService aktiviert ist, andernfalls false.

Beispiele

Das folgende Beispiel zeigt, wie Sie die IsEnabled -Eigenschaft verwenden, wenn Sie eine AnnotationServiceerstellen und starten. Wenn der Benutzer ein neues Dokument im Viewer-Steuerelement öffnen möchte, muss das AnnotationService für das alte Dokument deaktiviert und dann für das neue Dokument aktiviert werden.

// ------------------------ StartAnnotations --------------------------
/// <summary>
///   Enables annotations and displays all that are viewable.</summary>
private void StartAnnotations()
{
    // If there is no AnnotationService yet, create one.
    if (_annotService == null)
        // docViewer is a document viewing control named in Window1.xaml.
        _annotService = new AnnotationService(docViewer);

    // If the AnnotationService is currently enabled, disable it.
    if (_annotService.IsEnabled == true)
        _annotService.Disable();

    // Open a stream to the file for storing annotations.
    _annotStream = new FileStream(
        _annotStorePath, FileMode.OpenOrCreate, FileAccess.ReadWrite);

    // Create an AnnotationStore using the file stream.
    _annotStore = new XmlStreamStore(_annotStream);

    // Enable the AnnotationService using the new store.
    _annotService.Enable(_annotStore);
}// end:StartAnnotations()

' ------------------------ StartAnnotations --------------------------
''' <summary>
'''   Enables annotations and displays all that are viewable.</summary>
Private Sub StartAnnotations()
    ' If there is no AnnotationService yet, create one.
    If _annotService Is Nothing Then
        ' docViewer is a document viewing control named in Window1.xaml.
        _annotService = New AnnotationService(docViewer)
    End If

    ' If the AnnotationService is currently enabled, disable it.
    If _annotService.IsEnabled = True Then
        _annotService.Disable()
    End If

    ' Open a stream to the file for storing annotations.
    _annotStream = New FileStream(_annotStorePath, FileMode.OpenOrCreate, FileAccess.ReadWrite)

    ' Create an AnnotationStore using the file stream.
    _annotStore = New XmlStreamStore(_annotStream)

    ' Enable the AnnotationService using the new store.
    _annotService.Enable(_annotStore)
End Sub

Weitere Informationen

• Enable(AnnotationStore)
• Disable()