Loading a multipage Tiff file in a RadPdfViewer

Environment

Product Version	2019.2.618
Product	RadPDFViewer for WPF

Description

How to show a multipage Tiff file in the RadPdfViewer.

Solution

This functionality can be achieved by splitting the multipage TIFF file into single page ones. Then to insert them into a RadFixedDocument as a RadFixedPages content.

Example 1: Loading the TIFF file

C#

    private void LoadTiff(object sender, RoutedEventArgs e)
    {
        RadFixedDocument radFixedDocument = new RadFixedDocument();

        Stream[] tiffStreams = this.SplitTiff("SampleData/test.tiff");
        foreach (Stream tiffStream in tiffStreams)
        {
            RadFixedPage documentPage = new RadFixedPage();
            ImageSource imageSource = new ImageSource(tiffStream);
            documentPage.Content.AddImage(imageSource);
            radFixedDocument.Pages.Add(documentPage);
        }

        using (Stream documentStream = new MemoryStream())
        {
            PdfFormatProvider pdfFormatProvider = new PdfFormatProvider();
            pdfFormatProvider.Export(radFixedDocument, documentStream);

            RadFixedDocument document = new PdfFormatProvider(documentStream).Import();
            this.pdfViewer.Document = document;
        }
    }

Example 2: Splitting the TIFF file

C#

    private Stream[] SplitTiff(string inputFilePath)
    {
        //Get the frame dimension list from the image of the file and
        System.Drawing.Image tiffImage = System.Drawing.Image.FromFile(inputFilePath);
        //get the globally unique identifier (GUID)
        Guid objGuid = tiffImage.FrameDimensionsList[0];
        //create the frame dimension
        FrameDimension dimension = new FrameDimension(objGuid);
        //Gets the total number of frames in the .tiff file
        int noOfPages = tiffImage.GetFrameCount(dimension);

        ImageCodecInfo encodeInfo = null;
        ImageCodecInfo[] imageEncoders = ImageCodecInfo.GetImageEncoders();
        for (int j = 0; j < imageEncoders.Length; j++)
        {
            if (imageEncoders[j].MimeType == "image/tiff")
            {
                encodeInfo = imageEncoders[j];
                break;
            }
        }

        Stream[] tiffStreams = new Stream[noOfPages];

        foreach (Guid guid in tiffImage.FrameDimensionsList)
        {
            for (int index = 0; index < noOfPages; index++)
            {
                FrameDimension currentFrame = new FrameDimension(guid);
                tiffImage.SelectActiveFrame(currentFrame, index);

                Stream tiffStream = new MemoryStream();
                tiffImage.Save(tiffStream, ImageFormat.Tiff);
                tiffStreams[index] = tiffStream;
            }
        }

        return tiffStreams;
    }

Notes

There is a request to create a new TIFF Viewer Control. Make sure to cast your vote for it as this directly affects its priority: New Control: TIFF Viewer.