AnnotationStore.DeleteAnnotation(Guid) 方法

定義

命名空間:

System.Windows.Annotations.Storage

組件:

PresentationFramework.dll

將含有指定之 Id 的註解從存放區中刪除。

public:
 abstract System::Windows::Annotations::Annotation ^ DeleteAnnotation(Guid annotationId);

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

abstract member DeleteAnnotation : Guid -> System.Windows.Annotations.Annotation

Public MustOverride Function DeleteAnnotation (annotationId As Guid) As Annotation

參數

annotationId

Guid

所要刪除註解的 GUID Id 屬性。

傳回

Annotation

已刪除的註解；如果在存放區中找不到含有指定之 null 的註解，則為 annotationId。

例外狀況

ObjectDisposedException

已在存放區中呼叫 Dispose。

範例

下列範例示範 如何使用 DeleteAnnotation 和 Flush 方法。

// ------------------------- 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();
}

另請參閱

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