如何在WPF中将整个ScrollViewer打印成PDF文件

PrintDialog printDialog = new PrintDialog();
if (printDialog.ShowDialog() == true)
{
    // 设置打印机和打印参数
    printDialog.PrintQueue = new PrintQueue(new PrintServer(), printDialog.PrintQueue.Name);
    printDialog.PrintTicket = printDialog.PrintQueue.DefaultPrintTicket;

    // 获取ScrollViewer的实际大小
    Size scrollViewerSize = new Size(scrollViewer.ActualWidth, scrollViewer.ActualHeight);

    // 创建一个FixedDocument，并将ScrollViewer的内容添加到其中
    FixedDocument fixedDocument = new FixedDocument();
    fixedDocument.DocumentPaginator.PageSize = scrollViewerSize;
    fixedDocument.Pages.Add(CreatePage(scrollViewer, scrollViewerSize));

    // 打印FixedDocument到PDF文件
    string pdfFileName = "output.pdf";
    using (FileStream fileStream = new FileStream(pdfFileName, FileMode.Create))
    {
        PdfWriter pdfWriter = PdfWriter.GetInstance(fixedDocument, fileStream);
        pdfWriter.Open();
        pdfWriter.Close();
    }

    // 打印PDF文件
    printDialog.PrintQueue.AddJob("Print to PDF", pdfFileName, false);
}

private FixedPage CreatePage(ScrollViewer scrollViewer, Size size)
{
    // 创建一个FixedPage，并设置大小
    FixedPage fixedPage = new FixedPage();
    fixedPage.Width = size.Width;
    fixedPage.Height = size.Height;

    // 将ScrollViewer的内容渲染到RenderTargetBitmap中
    RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap((int)size.Width, (int)size.Height, 96, 96, PixelFormats.Pbgra32);
    renderTargetBitmap.Render(scrollViewer);

    // 创建一个Image，并将RenderTargetBitmap作为其Source
    Image image = new Image();
    image.Source = renderTargetBitmap;

    // 将Image添加到FixedPage中
    fixedPage.Children.Add(image);

    return fixedPage;
}