WPF注释加载到XPS

Question

在调查将AnnotationService类与XML Paper Specification（XPS）结合使用的过程中，我尝试保存和加载创建的注释。使用Save批注-一切都很简单（它是described on microsoft），但是有了负载-没有任何信息（缺少任何方法“ Read” /“ Write”）。对于AnnotationResource类，存在一些“读取” /“写入”方法，但是我不明白如何将其用于加载注释，以便与Annotation Service Class一起使用。如果您知道，这将是谁的工作，很有趣，值得一看？

Answer 1

EnableAnnotations（）-简单的启用注释（临时存储在MemoryStream中；]]

SaveAnnotations（）-将注释保存到FileStream;
• LoadAnnotations（）-从FileStream加载注释并启用注释；
• _storeMemory.Position = 0;上没有注释的注释无法正确保存或加载

    public class MyAnnotationStore 
    {
     XmlStreamStore _storeXML;
     MemoryStream _storeMemory;
     AnnotationService _anoService;

    public MyAnnotationStore(FlowDocumentReader myDocumentReader)
    {
        // Create the AnnotationService object that works
        // with our FlowDocumentReader.
        _anoService = new AnnotationService(myDocumentReader);

        // Create a MemoryStream which will hold the annotations.
        _storeMemory = new MemoryStream();
    }

    public void EnableAnnotations()
    {
        // Now, create a XML-based store based on the MemoryStream.
        // You could use this object to programmatically add, delete
        // or find annotations.
        _storeXML = new XmlStreamStore(_storeMemory);

        // Enable the annotation services.
        _anoService.Enable(_storeXML);
    }


    public void SaveAnnotations()
    {
        _storeXML.Flush();
        _storeMemory.Flush();
        using (FileStream fileStream = new FileStream("StickNotes.xml", FileMode.Create))
        {
            _storeMemory.Position = 0;
            _storeMemory.CopyTo(fileStream);
        }
    }

    public void LoadAnnotations()
    {
        FileStream fileStream = null;
        try
        {
            fileStream = new FileStream("StickNotes.xml", FileMode.Open, FileAccess.Read);
            fileStream.CopyTo(_storeMemory);
            _storeMemory.Position = 0;
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "Error File Read", MessageBoxButton.OK, MessageBoxImage.Error);
        }
        finally
        {
            if (fileStream != null) fileStream.Close();
        }

        // Enable the annotation services after loading annotations from fileStream
        EnableAnnotations();
     }

    }

用于测试目的的后台代码

    public partial class MainWindow : Window
    {
        MyAnnotationStore anoStore;

        public MainWindow()
        {
            InitializeComponent();
            // Create object for manipulate with annotations in myDocumentReader (load and create)
            anoStore = new MyAnnotationStore(myDocumentReader);
        }
}
和XAML

<FlowDocumentReader x:Name="myDocumentReader" Height="238.9">
                        <FlowDocument>
                            <Section>
                                <Paragraph>
                                    Here are some fun facts about the WPF Document API!
                                </Paragraph>
                            </Section>
                        </FlowDocument>
                    </FlowDocumentReader>