原文:

PrintDialog printDialog = new PrintDialog();            if (printDialog.ShowDialog() ==  true)            {                System.Printing.PrintCapabilities capabilities = printDialog.PrintQueue.GetPrintCapabilities(printDialog.PrintTicket);                // double scale = Math.Min(capabilities.PageImageableArea.ExtentWidth / myscrollvier.ActualWidth, capabilities.PageImageableArea.ExtentHeight /                //myscrollvier.ActualHeight);                var x1 = flowDocument.PageWidth;                var x2 = flowDocument.PageHeight;                flowDocument.PageHeight = capabilities.PageImageableArea.ExtentHeight;                flowDocument.PageWidth = capabilities.PageImageableArea.ExtentWidth;                printDialog.PrintDocument(((IDocumentPaginatorSource)flowDocument).DocumentPaginator, "Flow Document Print Job");                flowDocument.PageHeight = x2;                flowDocument.PageWidth = x1;            }

private void Button_Click(object sender, RoutedEventArgs e)        {            PrintDialog printDialog = new PrintDialog();            if (printDialog.ShowDialog() ==  true)            {                System.Printing.PrintCapabilities capabilities = printDialog.PrintQueue.GetPrintCapabilities(printDialog.PrintTicket);                // double scale = Math.Min(capabilities.PageImageableArea.ExtentWidth / myscrollvier.ActualWidth, capabilities.PageImageableArea.ExtentHeight /                //myscrollvier.ActualHeight);                var x1 = flowDocument.PageWidth;                var x2 = flowDocument.PageHeight;                flowDocument.PageHeight = capabilities.PageImageableArea.ExtentHeight;                flowDocument.PageWidth = capabilities.PageImageableArea.ExtentWidth;                printDialog.PrintDocument(((IDocumentPaginatorSource)flowDocument).DocumentPaginator, "Flow Document Print Job");                flowDocument.PageHeight = x2;                flowDocument.PageWidth = x1;            }        }