[Solved] PDFViewer slow when loading from memory

[Michele]

Hello,

I'm loading a pdf generared on wcf side with those lines of code

if (e.Error == null)
        {
            guidPDF = e.Result.Guid;

            MemoryStream ms = new MemoryStream(e.Result.Bytes);

            pdfViewer.ReportMemoryStream = ms;

            DateTime dtStart = DateTime.Now;

         //  PdfFormatProvider provider = new PdfFormatProvider(ms, Telerik.Windows.Documents.Fixed.FormatProviders.FormatProviderSettings.ReadAllAtOnce);
        //    this.pdfViewer.Document = provider.Import();

            pdfViewer.DocumentSource = new Telerik.Windows.Documents.Fixed.PdfDocumentSource(ms);
            TimeSpan ts = dtStart - DateTime.Now;
        }

using the provider.Import tooks around 31Seconds for a file of around 1Mb....using the PDFSource loads fast the first page but the other pages are blank.....any suggestion?
Thanks

[Kammen]

Hello Paolo,

With your code you are trying to load the whole document before displaying it. There is another setting that will allow you to load your document asynchronously. This will take much less time in the beginning, as a certain page will be parsed only when requested. You just need to use FormatProviderSettings.ReadOnDemand settings instead of FormatProviderSettings.ReadAllAtOnce. 

Hope this answers your question.

Regards,
Kammen
the Telerik team