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PDF Viewer print is thrrowing null reference exception

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PDFViewer

This is a migrated thread and some comments may be shown as answers.

Parthasarathy asked on 10 Jul 2013, 09:36 AM

We are using PDF Viewer print functionality to print the document. It was working but some times later, it is throwing "Null Reference Exception"

Version Details: 2012.3.1129.40

Exception Stack trace:

Object Reference not set to an object

at Microsoft.Internal.GDIExporter.CopyTo(UInt16& buffer, Int32 len, String s)

at Microsoft.Internal.GDIExporter.CGDIRenderTarget.CreateFontW(GlyphRun pGlyphRun, Double fontSize, Double scaleY)

at Microsoft.Internal.GDIExporter.CGDIRenderTarget.RenderTextThroughGDI(GlyphRun pGlyphRun, Brush pBrush)

at Microsoft.Internal.GDIExporter.CGDIRenderTarget.DrawGlyphRun(Brush pBrush, GlyphRun glyphRun)

at Microsoft.Internal.AlphaFlattener.BrushProxyDecomposer.Microsoft.Internal.AlphaFlattener.IProxyDrawingContext.DrawGlyphs(GlyphRun glyphrun, Geometry clip, Matrix trans, BrushProxy foreground)

at Microsoft.Internal.AlphaFlattener.PrimitiveRenderer.DrawGlyphs(GlyphRun glyphrun, Rect bounds, Matrix trans, String desp)

at Microsoft.Internal.AlphaFlattener.Flattener.AlphaRender(Primitive primitive, List`1 overlapping, Int32 overlapHasTransparency, Boolean disjoint, String desp)

at Microsoft.Internal.AlphaFlattener.Flattener.AlphaFlatten(IProxyDrawingContext dc, Boolean disjoint)

at Microsoft.Internal.AlphaFlattener.Flattener.Convert(Primitive tree, ILegacyDevice dc, Double width, Double height, Double dpix, Double dpiy, Nullable`1 quality)

at Microsoft.Internal.AlphaFlattener.MetroDevice0.FlushPage(ILegacyDevice sink, Double width, Double height, Nullable`1 outputQuality)

at Microsoft.Internal.AlphaFlattener.MetroToGdiConverter.FlushPage()

at System.Windows.Xps.Serialization.NgcSerializationManager.EndPage()

at System.Windows.Xps.Serialization.NgcDocumentPageSerializer.SerializeObject(Object serializedObject)

at System.Windows.Xps.Serialization.NgcDocumentPaginatorSerializer.SerializeObject(Object serializedObject)

at System.Windows.Xps.Serialization.NgcSerializationManager.SaveAsXaml(Object serializedObject)

at System.Windows.Xps.XpsDocumentWriter.SaveAsXaml(Object serializedObject, Boolean isSync)

at System.Windows.Xps.XpsDocumentWriter.Write(DocumentPaginator documentPaginator)

at System.Windows.Controls.PrintDialog.PrintDocument(DocumentPaginator documentPaginator, String description)

at Telerik.Windows.Documents.Fixed.Print.PrintManager.Print(PrintSettings settings)

at Telerik.Windows.Controls.FixedDocumentViewerBase.Print(PrintSettings settings)

at Telerik.Windows.Controls.FixedDocumentViewerBase.Print()

Let me know how to resolve this issue. and also the pdf document is of 70 Kb but while printing through PDF Viewer it sends 700 kb file to printer.

10 Answers, 1 is accepted

answered on 19 Jul 2013, 01:45 PM

PdfPrintTest.zip

Hi Rouven,

You can read this article which describes how to use RadPdfViewer in non-WPF applications.

Additionally, the loading of the document is asynchronous when you set the DocumentSource of RadPdfViewer. In order to load it synchronously, you need to directly set the Document property using PdfFormatProvider as you did in your project.
I'm attaching a sample project which shows how to print a document in a console application.

I hope this is helpful. Please, do not hesitate to contact us if you have any other questions.

Regards,
Alexander
Telerik

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answered on 31 Jul 2013, 11:53 AM

Hello Kedar,

We have tested our application against the described setup and it has printed the document successfully.

Could you please elaborate a little bit more on the error (exception type, inner exception type, stack trace) you are receiving as well as what version of RadControls for WPF you are using? It would be great if you could record a short video demonstrating the problem and send it back to us along with a sample project if you did some modifications to ours.

Looking forward to your response.

Regards,
Vasil
Telerik

answered on 12 Aug 2013, 10:29 AM

Hi ,

could you share your test application.

Following is the exception we are getting.

Exception Stack trace:

Object Reference not set to an object