IAnchorInfo 接口

定义

命名空间:

System.Windows.Annotations

程序集:

PresentationFramework.dll

提供将批注与相应的批注对象相匹配的功能。

public interface class IAnchorInfo

public interface IAnchorInfo

type IAnchorInfo = interface

Public Interface IAnchorInfo

示例

请考虑具有批注窗格的简单文档阅读器应用程序。 注释窗格可能是一个列表框，用于显示锚定到文档的批注列表的文本。 如果用户在列表框中选择一项，应用程序将显示相应的批注对象所锚定到的文档段落。

以下示例演示如何实现用作批注窗格的此类列表框的事件处理程序：

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();
    }
}

Private Sub annotationsListBox_SelectionChanged(ByVal sender As Object, ByVal e As SelectionChangedEventArgs)

    Dim comment As Annotation = TryCast((TryCast(sender, ListBox)).SelectedItem, Annotation)
    If comment IsNot Nothing Then
        ' service is an AnnotationService object
        ' comment is an Annotation object
        info = AnnotationHelper.GetAnchorInfo(Me.service, comment)
        Dim resolvedAnchor As TextAnchor = TryCast(info.ResolvedAnchor, TextAnchor)
        Dim textPointer As TextPointer = CType(resolvedAnchor.BoundingStart, TextPointer)
        textPointer.Paragraph.BringIntoView()
    End If
End Sub

属性

Anchor	获取批注的定位点。
Annotation	获取批注对象。
ResolvedAnchor	获取表示树中解析 Anchor 的位置的对象。

另请参阅

• GetAnchorInfo(AnnotationService, Annotation)