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TextAnchor Class

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

System.Object
  System.Windows.Annotations.TextAnchor

Namespace:  System.Windows.Annotations
Assembly:  PresentationFramework (in PresentationFramework.dll)
public sealed class TextAnchor

The TextAnchor type exposes the following members.

  NameDescription
Public propertyBoundingEndGets the end position of the text anchor.
Public propertyBoundingStartGets the beginning position of the text anchor.
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  NameDescription
Public methodEqualsReturns a value that indicates whether the text anchor is equal to the specified object. (Overrides Object.Equals(Object).)
Public methodGetHashCodeReturns the hash code of the text anchor instance. (Overrides Object.GetHashCode().)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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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 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;
        textPointer.Paragraph.BringIntoView();
    }
}

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5 SP1, 3.0 SP1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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