RichEditControl: Null Reference Exception when trying to insert an SVG image.

Daniel K.

created 2 days ago

System.Windows.Media.Imaging.BitmapDecoder.SetupDecoderFromUriOrStream throws a Null Reference Exception trying to close a null BitmapStream when called from XpfPainter.CreatePlatformImageSourceCore.

C#
static ImageSource CreatePlatformImageSourceCore(OfficeImage img) {
    BitmapImage imageSource = new BitmapImage();
    imageSource.BeginInit();
    byte[] bytes = img.GetImageBytesSafe(img.RawFormat);
    imageSource.StreamSource = new System.IO.MemoryStream(bytes);
    if (img.SizeInPixels.Width > maxImageSize || img.SizeInPixels.Height > maxImageSize) {
        double aspectRatio = img.SizeInPixels.Width / img.SizeInPixels.Height;
        int width, height;
        if (img.SizeInPixels.Width > maxImageSize) {
            width = maxImageSize;
            height = (int)Math.Round(width / aspectRatio);
        }
        else {
            height = maxImageSize;
            width = (int)Math.Round(height * aspectRatio);
        }
        imageSource.DecodePixelWidth = width;
        imageSource.DecodePixelHeight = height;
    }
    //Null Reference Exception Here
    imageSource.EndInit();
    imageSource.Freeze();
    return imageSource;
}

NRE Call Stack.txt

Answers approved by DevExpress Support

Sasha (DevExpress Support)

created 2 days ago

Hello Daniel,

We have the following report related to a similar issue: RichEditControl - System.ArgumentException occurs on scrolling a document. Our developers are investigating the issue. Please watch for our updates there.

In the meantime, would you please describe steps to reproduce the issue or share a small sample project where the issue is reproducible? This way, we can ensure that the RichEditControl - System.ArgumentException occurs on scrolling a document issue reported earlier is the same.

Comments (2)

Daniel K. a day ago

Simply inserting any SVG file by going to Insert - Picture seems to cause the issue.
I have shared a sample project which demonstrates the issue.

RichEditSvgTest.zip

Sasha (DevExpress Support) 20 hours ago

Hello Daniel,

Thank you for the clarification and the sample project. It appears that this issue is different. As such, I created a separate report and forwarded it to our developers: RichEditControl - NullReferenceException occurs when an SVG image is inserted. We will update it as soon as we have any results.

As a workaround, you can render an SVG image as a bitmap and add it to RichEditControl as follows:

C#
Document document = richEditControl1.Document;
SvgImage svgImage = SvgImage.FromFile("folder.svg");     
SvgBitmap svgBitmap = SvgBitmap.Create(svgImage);
var bitmap = svgBitmap.Render(null, 1.0);
DocumentImage picture = document.Images.Insert(document.Range.Start, DocumentImageSource.FromGdiImage(bitmap));

RichEditSvgTest.zip

RichEditControl: Null Reference Exception when trying to insert an SVG image.

Answers approved by DevExpress Support

Recently viewed tickets