IAnchorInfo Interface

IAnchorInfo Interface


Provides the capabilities for matching annotations with the corresponding annotated objects.

Namespace:   System.Windows.Annotations
Assembly:  PresentationFramework (in PresentationFramework.dll)

public interface IAnchorInfo


Gets the anchor of the annotation.


Gets the annotation object.


Gets the object that represents the location on the tree where the Anchor is resolved.

IAnchorInfo is introduced in the Microsoft .NET Framework version 3.5. For more information, see .NET Framework Versions and Dependencies.

Consider a simple document reader application that has a comments pane. The comments pane might be a list box that displays the text from a list of annotations that are anchored to a document. If the user selects an item in the list box, then the application brings into view the paragraph in the document that the corresponding annotation object is anchored to.

The following example demonstrates how to implement the event handler of such a list box that serves as the comments pane:

void annotationsListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)

    Annotation comment = (sender as ListBox).SelectedItem as Annotation;
    if (comment != null)
        // IAnchorInfo info;
        // service is an AnnotationService object
        // comment is an Annotation object
        info = AnnotationHelper.GetAnchorInfo(this.service, comment);
        TextAnchor resolvedAnchor = info.ResolvedAnchor as TextAnchor;
        TextPointer textPointer = (TextPointer)resolvedAnchor.BoundingStart;

.NET Framework
Available since 3.0
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