XmlStreamStore.DeleteAnnotation(Guid) Method

Definition

Namespace:

System.Windows.Annotations.Storage

Assembly:

PresentationFramework.dll

Deletes the annotation with the specified Id from the store.

C#

public override System.Windows.Annotations.Annotation DeleteAnnotation(Guid annotationId);

Parameters

annotationId

Guid

The globally unique identifier (GUID) Id property of the annotation to be deleted.

Returns

Annotation

The annotation that was deleted; otherwise, null if an annotation with the specified annotationId was not found in the store.

Exceptions

ObjectDisposedException

Dispose has been called on the store.

InvalidOperationException

An I/O Stream has not been set for the store.

Examples

The following example shows use of the DeleteAnnotation and Flush methods.

C#

// ------------------------- DeleteMark_Click -------------------------
void DeleteMark_Click(object sender, RoutedEventArgs e)
{
    Annotation ann = ((MenuItem)sender).Tag as Annotation;
    _annStore.DeleteAnnotation(ann.Id);
    _annStore.Flush();

    MenuItem thisMenu = sender as MenuItem;
    ContextMenu parentMenu = thisMenu.Parent as ContextMenu;
    FrameworkElement dObj =
        parentMenu.PlacementTarget as FrameworkElement;
    while (!(dObj is StackPanel))
    {
        dObj = dObj.Parent as FrameworkElement;
    }

    ListBox collection = dObj.Parent as ListBox;
    collection.Items.Remove(dObj);
    Util.FlushDispatcher();
}

Applies to

See also

• AddAnnotation(Annotation)
• GetAnnotation(Guid)
• GetAnnotations