AnnotationService.Store 属性

定义

命名空间:

System.Windows.Annotations

程序集:

PresentationFramework.dll

获取由此 AnnotationStore 使用的 AnnotationService。

public:
 property System::Windows::Annotations::Storage::AnnotationStore ^ Store { System::Windows::Annotations::Storage::AnnotationStore ^ get(); };

public System.Windows.Annotations.Storage.AnnotationStore Store { get; }

member this.Store : System.Windows.Annotations.Storage.AnnotationStore

Public ReadOnly Property Store As AnnotationStore

属性值

AnnotationStore

此 AnnotationStore 使用的 AnnotationService。

示例

下面的示例演示如何在启动和停止属性AnnotationService时使用Store属性。

// ------------------------ StartAnnotations --------------------------
/// <summary>
///   Enables annotations and displays all that are viewable.</summary>
private void StartAnnotations()
{
    // If there is no AnnotationService yet, create one.
    if (_annotService == null)
        // docViewer is a document viewing control named in Window1.xaml.
        _annotService = new AnnotationService(docViewer);

    // If the AnnotationService is currently enabled, disable it.
    if (_annotService.IsEnabled == true)
        _annotService.Disable();

    // Open a stream to the file for storing annotations.
    _annotStream = new FileStream(
        _annotStorePath, FileMode.OpenOrCreate, FileAccess.ReadWrite);

    // Create an AnnotationStore using the file stream.
    _annotStore = new XmlStreamStore(_annotStream);

    // Enable the AnnotationService using the new store.
    _annotService.Enable(_annotStore);
}// end:StartAnnotations()

// ------------------------ StopAnnotations ---------------------------
/// <summary>
///   Disables annotation processing and hides all annotations.</summary>
private void StopAnnotations()
{
    // If the AnnotationStore is active, flush and close it.
    if (_annotStore != null)
    {
        _annotStore.Flush();
        _annotStream.Flush();
        _annotStream.Close();
        _annotStore = null;
    }

    // If the AnnotationService is active, shut it down.
    if (_annotService != null)
    {
        if (_annotService.IsEnabled)
        {
            _annotService.Disable();  // Disable the AnnotationService.
            _annotService = null;
        }
    }
}// end:StopAnnotations()

' ------------------------ StartAnnotations --------------------------
''' <summary>
'''   Enables annotations and displays all that are viewable.</summary>
Private Sub StartAnnotations()
    ' If there is no AnnotationService yet, create one.
    If _annotService Is Nothing Then
        ' docViewer is a document viewing control named in Window1.xaml.
        _annotService = New AnnotationService(docViewer)
    End If

    ' If the AnnotationService is currently enabled, disable it.
    If _annotService.IsEnabled = True Then
        _annotService.Disable()
    End If

    ' Open a stream to the file for storing annotations.
    _annotStream = New FileStream(_annotStorePath, FileMode.OpenOrCreate, FileAccess.ReadWrite)

    ' Create an AnnotationStore using the file stream.
    _annotStore = New XmlStreamStore(_annotStream)

    ' Enable the AnnotationService using the new store.
    _annotService.Enable(_annotStore)
End Sub


' ------------------------ StopAnnotations ---------------------------
''' <summary>
'''   Disables annotation processing and hides all annotations.</summary>
Private Sub StopAnnotations()
    ' If the AnnotationStore is active, flush and close it.
    If _annotStore IsNot Nothing Then
        _annotStore.Flush()
        _annotStream.Flush()
        _annotStream.Close()
        _annotStore = Nothing
    End If

    ' If the AnnotationService is active, shut it down.
    If _annotService IsNot Nothing Then
        If _annotService.IsEnabled Then
            _annotService.Disable() ' Disable the AnnotationService.
            _annotService = Nothing
        End If
    End If
End Sub

注解

AnnotationStore由该服务使用AnnotationService的参数指定为服务方法中的Enable参数。