TextAnchor.BoundingStart 属性
定义
重要
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获取文本锚点的开始位置。
public:
property System::Windows::Documents::ContentPosition ^ BoundingStart { System::Windows::Documents::ContentPosition ^ get(); };public System.Windows.Documents.ContentPosition BoundingStart { get; }member this.BoundingStart : System.Windows.Documents.ContentPositionPublic ReadOnly Property BoundingStart As ContentPosition属性值
文本锚点的开始位置。
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。
下面的示例演示如何实现充当注释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