AnnotationHelper.GetAnchorInfo(AnnotationService, Annotation) 方法

定義

命名空間:

System.Windows.Annotations

組件:

PresentationFramework.dll

傳回 IAnchorInfo 物件，這個物件提供有關指定之附註的錨定資訊，例如錨定位置。

public:
 static System::Windows::Annotations::IAnchorInfo ^ GetAnchorInfo(System::Windows::Annotations::AnnotationService ^ service, System::Windows::Annotations::Annotation ^ annotation);

public static System.Windows.Annotations.IAnchorInfo GetAnchorInfo (System.Windows.Annotations.AnnotationService service, System.Windows.Annotations.Annotation annotation);

static member GetAnchorInfo : System.Windows.Annotations.AnnotationService * System.Windows.Annotations.Annotation -> System.Windows.Annotations.IAnchorInfo

Public Shared Function GetAnchorInfo (service As AnnotationService, annotation As Annotation) As IAnchorInfo

參數

service

AnnotationService

用於這個作業的附註服務。

annotation

Annotation

要取得相關錨定資訊的附註。

傳回

IAnchorInfo

IAnchorInfo 物件，提供有關指定之附註的錨定資訊，如果無法解析物件，則為 null。

範例

請考慮具有批註窗格的簡單檔讀取器應用程式。 註解窗格可能是清單方塊，其中顯示來自錨定到文件之註釋清單的文字。 如果使用者在清單方塊中選取項目，則應用程式會將對應註釋物件所錨定之文件中的段落帶入檢視。

下列範例示範如何為這類作為註解窗格的清單方塊實作事件處理常式。

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

另請參閱

• TextAnchor