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POWPF printing/xps issue
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copied!<p>I have written the following chunk of code that prints my ListBox perfectly when being sent to a physical printer, however when trying to send it to the XPS printer driver or using the XpsDocumentWriter class (I assume they use the same code under the hood) I receive the following exception:</p> <p>System.ArgumentException was unhandled by user code Message=Width and Height must be non-negative. Source=ReachFramework StackTrace: at System.Windows.Xps.Serialization.VisualSerializer.WriteTileBrush(String element, TileBrush brush, Rect bounds)</p> <p>The exception obviously points to an item not having a correct width/height however I have debugged the code when sending it to the different printers (physical and XPS driver) and I haven't been able to find any differences.</p> <p>Below is how I create the visual to send to the printer:</p> <pre><code>private ScrollViewer GeneratePrintableView() { ScrollViewer scrollView = new ScrollViewer(); Grid grid = new Grid { Background = Brushes.White, Width = this.myListBox.ActualWidth, Height = this.myListBox.ActualHeight }; grid.RowDefinitions.Add(new RowDefinition()); grid.RowDefinitions[0].Height = new GridLength(0, GridUnitType.Auto); grid.RowDefinitions.Add(new RowDefinition()); grid.RowDefinitions[1].Height = new GridLength(0, GridUnitType.Auto); // Add the title and icon to the top VisualBrush titleClone = new VisualBrush(this.TitleBar); var titleRectangle = new Rectangle { Fill = titleClone, Width = this.TitleBar.ActualWidth, Height = this.TitleBar.ActualHeight }; grid.Children.Add(titleRectangle); Grid.SetRow(titleRectangle, 0); this.myListBox.Width = this.myListBox.ActualWidth; this.myListBox.Height = this.myListBox.ActualHeight; VisualBrush clone = new VisualBrush(this.myListBox) { Stretch = Stretch.None, AutoLayoutContent = true }; var rectangle = new Rectangle { Fill = clone, Width = this.myListBox.ActualWidth, Height = this.myListBox.ActualHeight }; Border border = new Border { Background = Brushes.White, Width = this.myListBox.ActualWidth, Height = this.myListBox.ActualHeight }; border.Child = rectangle; grid.Children.Add(border); Grid.SetRow(border, 1); scrollView.Width = this.myListBox.ActualWidth; scrollView.Height = this.myListBox.ActualHeight; scrollView.Content = grid; scrollView.VerticalScrollBarVisibility = ScrollBarVisibility.Hidden; return scrollView; } </code></pre> <p>Here is the GetPage override in my DocumentPaginator implementation:</p> <pre><code>public override DocumentPage GetPage(int pageNumber) { Page page = new Page(); double z = 0.0; this.grid = new Grid(); this.grid.RowDefinitions.Add(new RowDefinition()); this.grid.RowDefinitions[0].Height = new GridLength(0, GridUnitType.Auto); this.grid.Children.Add(this.printViewer); Grid.SetRow(this.printViewer, 0); //Adjusting the vertical scroll offset depending on the page number if (pageNumber + 1 == 1) //if First Page { this.printViewer.ScrollToVerticalOffset(0); this.printViewer.UpdateLayout(); } else if (pageNumber + 1 == _verticalPageCount) //if Last Page { if (this.printViewer.ScrollableHeight == 0) //If printing only single page and the contents fits only on one page { this.printViewer.ScrollToVerticalOffset(0); this.printViewer.UpdateLayout(); } else if (this.printViewer.ScrollableHeight <= this.printViewer.Height) //If scrollconentheight is less or equal than scrollheight { this.printViewer.Height = this.printViewer.ScrollableHeight; this.printViewer.ScrollToEnd(); this.printViewer.UpdateLayout(); } else //if the scrollcontentheight is greater than scrollheight then set the scrollviewer height to be the remainder between scrollcontentheight and scrollheight { this.printViewer.Height = (this.printViewer.ScrollableHeight % this.printViewer.Height) + 5; this.printViewer.ScrollToEnd(); this.printViewer.UpdateLayout(); } } else //Other Pages { z = z + this.printViewer.Height; this.printViewer.ScrollToVerticalOffset(z); this.printViewer.UpdateLayout(); } page.Content = this.grid; //put the grid into the page page.Arrange(new Rect(this.originalMargin.Left, this.originalMargin.Top, this.ContentSize.Width, this.ContentSize.Height)); page.UpdateLayout(); return new DocumentPage(page); } </code></pre> <p>Interestingly if I change the Fill of rectangle to a Brush instead of clone then I do not receive the exception and the outputted file is the correct size.</p> <p>I have spent over a day trying to debug why this isn't working and I am hoping that someone out there has either seen a similar issue or is able to point out any mistakes I am making.</p> <p>Thanks for any responses.</p>

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