WPF Richtextbox 图像和调整装饰器

Question

Good morning, I have a richtextbox which allows me to insert an image via right click context menu. This functionality works, and the image is inserted into the richtextbox with no issues (adorner shows).

Working adorner

The issue I have is that when I export the.rtf to xml I loose all the adorners and clicking on the image doesn't allow me to resize it.

Not working adorner post export

The export code that appears to break the adorners is:

public static readonly DependencyProperty DocumentXamlProperty =
        DependencyProperty.RegisterAttached(
            "DocumentXaml",
            typeof(string),
            typeof(RichTextBoxHelper),
            new FrameworkPropertyMetadata
            {
                BindsTwoWayByDefault = true,
                PropertyChangedCallback = (obj, e) =>
                {
                    var richTextBox = (RichTextBox)obj;

                    // Parse the XAML to a document (or use XamlReader.Parse())
                    var xaml = GetDocumentXaml(richTextBox);
                    var doc = new FlowDocument();
                    var range = new TextRange(doc.ContentStart, doc.ContentEnd);

                    range.Load(new MemoryStream(Encoding.UTF8.GetBytes(xaml)),
                          DataFormats.Rtf);

                    // Set the document (*this breaks the adorners*)
                    richTextBox.Document = doc;

                    // When the document changes update the source
                    range.Changed += (obj2, e2) =>
                    {
                        if (richTextBox.Document == doc)
                        {
                            MemoryStream buffer = new MemoryStream();
                            range.Save(buffer, DataFormats.Xaml);
                            SetDocumentXaml(richTextBox,
                                Encoding.UTF8.GetString(buffer.ToArray()));
                        }
                    };
                }
            });

I wanted to know how I can re-set the adorners on existing images, when I click on them, or not loose the adorners during the conversion to xml when the above code is called.

Any help appreciated.

Regards, Tithras

Answer 1

Issue resolved, it was during the conversion of the text from rtf to xaml and then back again during the binding, this basically killed the adorners.