TextAnchor Class

Represents a selection of content that an annotation is anchored to.

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

public sealed class TextAnchor
You cannot directly create an instance of this class in XAML.

TextAnchor is the object type of the returned ResolvedAnchor if you are using sticky notes and highlights in flow or fixed documents.

TextAnchor is introduced in the Microsoft .NET Framework version 3.5. For more information, see .NET Framework 3.5 Architecture.

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;
        textPointer.Paragraph.BringIntoView();
    }
}

For the complete example, see Annotated Document Viewer with Comments Pane Sample.

System.Object
  System.Windows.Annotations.TextAnchor

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5 SP1, 3.0 SP1
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