PDF Export - WatermarkText problem

[Wolfgang]

Hi everybody,

when i export a document to pdf without a watermark, the there are no problems.

But when i add a watermark text and then try to export it, then the program crashes.

Here i create a draft document.

private void CreateDraft()
{
    WatermarkTextSettings watermark = new WatermarkTextSettings();
    watermark.ForegroundColor = Colors.Gray;
    watermark.Opacity = 1.0d;
    watermark.RotateAngle = 315.0d;
    watermark.Text = "Vorabexemplar";

    this.rtbResult.SetWatermarkText(watermark);

    this.UpdatePdfViewer();
}

 

After adding the watermark the pdf viewer needs to be updated to set the results:

private void UpdatePdfViewer()
{
    RadDocument doc = this.rtbResult.Document;

    var pdfProvider = new PdfFormatProvider();
    var outputStream = new MemoryStream();

    pdfProvider.Export(doc, outputStream);

    this.rtbResult.UpdateEditorLayout();

    this.pdfViewer.DocumentSource = new PdfDocumentSource(outputStream);
    this.pdfViewer.DocumentSource.Loaded += (s, e) => { outputStream.Close(); };
}

 

Everthing works fine without watermark. With watermark the programm crashs on line pdfProvider.Export(doc, outputStream);

I've also tryed the solution in the following thread without success Mail Merge - PDF Export - Watermark problem

 

Full error message

bei Telerik.Windows.Documents.UI.UIProviders.WatermarkUIProvider.Arrange(UILayerUpdateContext uILayerUpdateContext)
bei Telerik.Windows.Documents.UI.Layers.ProviderUILayerBase.ArrangeChildren()
bei Telerik.Windows.Documents.UI.DocumentPagePresenter.ArrangeUILayers()
bei Telerik.Windows.Documents.UI.DocumentPagePresenter.MeasureOverride(Size availableSize)
bei System.Windows.FrameworkElement.MeasureCore(Size availableSize)
bei System.Windows.UIElement.Measure(Size availableSize)
bei System.Windows.Controls.Canvas.MeasureOverride(Size constraint)
bei System.Windows.FrameworkElement.MeasureCore(Size availableSize)
bei System.Windows.UIElement.Measure(Size availableSize)
bei MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
bei System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
bei System.Windows.FrameworkElement.MeasureCore(Size availableSize)
bei System.Windows.UIElement.Measure(Size availableSize)
bei System.Windows.Controls.Grid.MeasureOverride(Size constraint)
bei System.Windows.FrameworkElement.MeasureCore(Size availableSize)
bei System.Windows.UIElement.Measure(Size availableSize)
bei System.Windows.Controls.Border.MeasureOverride(Size constraint)
bei System.Windows.FrameworkElement.MeasureCore(Size availableSize)
bei System.Windows.UIElement.Measure(Size availableSize)
bei System.Windows.Controls.Control.MeasureOverride(Size constraint)
bei Telerik.Windows.Documents.UI.DocumentPrintLayoutPresenter.MeasureOverride(Size availableSize)
bei System.Windows.FrameworkElement.MeasureCore(Size availableSize)
bei System.Windows.UIElement.Measure(Size availableSize)
bei MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
bei System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
bei System.Windows.FrameworkElement.MeasureCore(Size availableSize)
bei System.Windows.UIElement.Measure(Size availableSize)
bei System.Windows.ContextLayoutManager.UpdateLayout()
bei System.Windows.UIElement.UpdateLayout()
bei Telerik.Windows.Documents.UI.DocumentPresenterBase.Telerik.Windows.Controls.IDocumentEditorPresenter.UpdateLayout()
bei Telerik.Windows.Controls.RadRichTextBox.<>c__DisplayClass20.<UpdateEditorLayout>b__1f()
bei Telerik.Windows.Controls.RadRichTextBox.UpdateEditorLayout(Boolean focusCarret, Boolean updateCaretSize, Boolean async)
bei Telerik.Windows.Controls.RadRichTextBox.UpdateEditorLayout(Boolean async)
bei Telerik.Windows.Controls.RadRichTextBox.UpdateEditorLayout()
bei Telerik.Windows.Controls.RadRichTextBox.Document_LayoutModeChanged(Object sender, EventArgs e)
bei Telerik.Windows.Documents.Model.RadDocument.OnLayoutModeChanged()
bei Telerik.Windows.Documents.Model.RadDocument.set_LayoutMode(DocumentLayoutMode value)
bei Telerik.Windows.Documents.FormatProviders.Pdf.RadDocumentPreparer..ctor(RadDocument document)
bei Telerik.Windows.Documents.FormatProviders.Pdf.PdfFormatProvider.Export(RadDocument document, Stream output)
bei LvsDocumentEngine.Gui.Dialogs.CreateDocumentDialog.UpdatePdfViewer() in d:\Projekte\Kunden\METAX GmbH\Metax-ERP\LvsDocumentEngine\Gui\Dialogs\CreateDocumentDialog.xaml.cs:Zeile 121.
bei LvsDocumentEngine.Gui.Dialogs.CreateDocumentDialog.btnCreateDraft_Click(Object sender, RoutedEventArgs e) in d:\Projekte\Kunden\METAX GmbH\Metax-ERP\LvsDocumentEngine\Gui\Dialogs\CreateDocumentDialog.xaml.cs:Zeile 303.
bei System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
bei System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
bei System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
bei System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
bei System.Windows.Controls.Primitives.ButtonBase.OnClick()
bei System.Windows.Controls.Button.OnClick()
bei Telerik.Windows.Controls.RadButton.OnClick()
bei System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
bei System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
bei System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
bei System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
bei System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
bei System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
bei System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
bei System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
bei System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
bei System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
bei System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
bei System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
bei System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
bei System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
bei System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
bei System.Windows.Input.InputManager.ProcessStagingArea()
bei System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
bei System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
bei System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
bei System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
bei System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
bei MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
bei MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
bei System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
bei System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
bei System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
bei MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
bei MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
bei System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
bei System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
bei System.Windows.Window.ShowHelper(Object booleanBox)
bei System.Windows.Window.Show()
bei System.Windows.Window.ShowDialog()

[Martin Ivanov]

Hello Wolfgang,

I tested the provided code but I wasn't able to reproduce the error. Can you take a look at the attached project and let me know if I am missing something? Also, can you tell me what is the exact exception that is thrown?

Regards,
Martin
Telerik by Progress

[Wolfgang]

Hello Martin,

Exact exception: System.NullReferenceException: Object reference not set to an instance of an object.

I'll try to create a sample project to reproduce this error.

Regards,
Wolfgang

 

[Martin Ivanov]

Hi Wolfgang,

Thank you for the exception info. If you succeed to reproduce the error in a new project don't hesitate to post the information here.

Regards,
Martin
Telerik by Progress