在 Windows 8.1 下以横向模式剪切打印的 wpf 视觉对象

Posted 2023-03-10

【中文标题】在 Windows 8.1 下以横向模式剪切打印的 wpf 视觉对象

【英文标题】：Printed wpf visual is clipped in landscape mode under Windows 8.1

【发布时间】：2015-09-17 09:17:18

【问题描述】：

我有一个简单的 wpf 桌面应用程序，它以横向模式打印位图。 在 Windows 8/8.1 下，打印输出被剪裁在页面底部，而在 Windows 7 下，打印输出正确。 代码很简单：加载位图，放入Image对象，测量可打印区域，排列图像并打印。

 void printButton_Click(object sender, RoutedEventArgs e)
    
        var pd = new PrintDialog();

        if (!pd.ShowDialog().Value)
        
            return;
        

        pd.PrintTicket.PageOrientation = PageOrientation.Landscape;
        pd.PrintTicket.PageBorderless = PageBorderless.None;

        var printingCapabilities = pd.PrintQueue.GetPrintCapabilities(pd.PrintTicket);

        var bitmapImage = new BitmapImage();
        bitmapImage.BeginInit();
        bitmapImage.UriSource = new Uri("D:\\printTest.bmp");
        bitmapImage.EndInit();

        var imageuiElement = new Image  Source = bitmapImage ;

        var desiredSize = new Size(printingCapabilities.PageImageableArea.ExtentWidth, printingCapabilities.PageImageableArea.ExtentHeight);
        imageuiElement.Measure(desiredSize);
        imageuiElement.Arrange(new Rect(new Point(printingCapabilities.PageImageableArea.OriginWidth, printingCapabilities.PageImageableArea.OriginHeight), imageuiElement.DesiredSize));

        pd.PrintVisual(imageuiElement, "MyImage");
    

位图大小为 1518 x 1092 像素，96 DPI，即 40.2 x 28.9 cm。

我找到了问题Cannot print a document with landscape orientation under Windows 8 (WPF, .NET 4.0) 但对我的问题没有很好的回应（此外，我对作为横向打印本身没有问题）。 我已经用不同供应商的不同打印机对其进行了测试，所有打印输出都被剪裁了。软件 CutePDF writer 将其正确打印为 PDF。 任何帮助表示赞赏。

【参考方案1】：

Windows 8 似乎不会在其容器边界之外绘制 ui 元素。这就是打印输出被剪裁在底部的原因。 无论如何，我最终得到了这样的代码，它能够在横向页面上打印居中的位图：

printDialog.PrintTicket.PageOrientation = PageOrientation.Landscape;
            printDialog.PrintTicket.PageBorderless = PageBorderless.None;

            var printingCapabilities = printDialog.PrintQueue.GetPrintCapabilities(printDialog.PrintTicket);
            if (printingCapabilities.PageImageableArea == null)
            
                return;
            

            var document = new FixedDocument();
            document.DocumentPaginator.PageSize = new Size(printingCapabilities.PageImageableArea.ExtentWidth, printingCapabilities.PageImageableArea.ExtentHeight);

            foreach (var imageStream in imageStreams)
            
                document.Pages.Add(GeneratePageContent(imageStream, printingCapabilities, printDialog.PrintableAreaWidth, printDialog.PrintableAreaHeight));
            

            try
            
                printDialog.PrintDocument(document.DocumentPaginator, GlobalConstants.SoftwareName);
            

private PageContent GeneratePageContent(Stream imageStream, PrintCapabilities printingCapabilities, double paperWidth, double paperHeight)
    
        imageStream.Seek(0, SeekOrigin.Begin);

        var bmp = new BitmapImage();
        bmp.BeginInit();
        bmp.StreamSource = imageStream;
        bmp.EndInit();

        var margin = new Thickness();
        var pageSize = new Size();

        if (printingCapabilities.PageImageableArea != null)
        
            margin = new Thickness(
                printingCapabilities.PageImageableArea.OriginWidth,
                printingCapabilities.PageImageableArea.OriginHeight,
                printingCapabilities.PageImageableArea.OriginWidth,
                printingCapabilities.PageImageableArea.OriginHeight);

            pageSize = new Size(printingCapabilities.PageImageableArea.ExtentWidth, printingCapabilities.PageImageableArea.ExtentHeight);
        

        var imageUiElement = new Image
        
            Source = bmp,
            Margin = margin
        ;

        var canvas = new Grid  Width = paperWidth, Height = paperHeight ;
        canvas.Children.Add(imageUiElement);

        var fixedPage = new FixedPage
        
            Width = paperWidth,
            Height = paperHeight
        ;

        fixedPage.Children.Add(canvas);

        var pageContent = new PageContent();
        ((IAddChild)pageContent).AddChild(fixedPage);

        pageContent.Measure(pageSize);
        pageContent.Arrange(new Rect(new Point(), pageSize));
        pageContent.UpdateLayout();

        return pageContent;