AnnotationService.IsEnabled Property

Definition

Namespace:

System.Windows.Annotations

Assembly:

PresentationFramework.dll

Gets a value that indicates whether the AnnotationService is enabled.

C#

public bool IsEnabled { get; }

Property Value

Boolean

true if the AnnotationService is enabled; otherwise, false.

Examples

The following example shows how to use the IsEnabled property when you create and start an AnnotationService. Also if the user chooses to open a new document in the viewer control, the AnnotationService must be disabled for the old document and then enabled for the new document.

C#

// ------------------------ 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)
        _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()

Applies to

See also

• Enable(AnnotationStore)
• Disable()