Conversión de PDF a PostScript

El siguiente fragmento de código también funciona con la biblioteca Aspose.PDF.Drawing.

PDF a Postscript en C#

La clase PdfViewer proporciona la capacidad de imprimir documentos PDF y con la ayuda de esta clase, también podemos convertir archivos PDF a formato PostScript. Para convertir un archivo PDF en PostScript, primero instale cualquier impresora PS y simplemente imprima en archivo con la ayuda de PdfViewer. Para instalar una impresora PS, consulte las instrucciones proporcionadas por su proveedor de impresoras. El siguiente fragmento de código le muestra cómo imprimir y convertir un PDF a formato PostScript.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void PrintToPostscriptFile()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    // Create PdfViewer object
    using (var viewer = new Aspose.Pdf.Facades.PdfViewer())
    {
        // Bind PDF document
        viewer.BindPdf(dataDir + "PrintDocument.pdf");

        // Set PrinterSettings and PageSettings
        var printerSettings = new Aspose.Pdf.Printing.PrinterSettings();
        printerSettings.Copies = 1;

        // Set PS printer, one can find this driver in the list of preinstalled printer drivers in Windows
        printerSettings.PrinterName = "HP LaserJet 2300 Series PS";

        // Set output file name and PrintToFile attribute
        printerSettings.PrintFileName = dataDir + "PdfToPostScript_out.ps";
        printerSettings.PrintToFile = true;
        
        // Disable print page dialog
        viewer.PrintPageDialog = false;
        
        // Pass printer settings object to the method
        viewer.PrintDocumentWithSettings(printerSettings);
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void PrintToPostscriptFile()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    // Create PdfViewer object
    using var viewer = new Aspose.Pdf.Facades.PdfViewer();

    // Bind PDF document
    viewer.BindPdf(dataDir + "PrintDocument.pdf");

    // Set PrinterSettings and PageSettings
    var printerSettings = new Aspose.Pdf.Printing.PrinterSettings();
    printerSettings.Copies = 1;

    // Set PS printer, one can find this driver in the list of preinstalled printer drivers in Windows
    printerSettings.PrinterName = "HP LaserJet 2300 Series PS";

    // Set output file name and PrintToFile attribute
    printerSettings.PrintFileName = dataDir + "PdfToPostScript_out.ps";
    printerSettings.PrintToFile = true;
        
    // Disable print page dialog
    viewer.PrintPageDialog = false;
        
    // Pass printer settings object to the method
    viewer.PrintDocumentWithSettings(printerSettings);
}

Comprobando el estado del trabajo de impresión

Un archivo PDF se puede imprimir en una impresora física así como en el Microsoft XPS Document Writer, sin mostrar un cuadro de diálogo de impresión, utilizando la clase PdfViewer. Al imprimir archivos PDF grandes, el proceso puede tardar mucho tiempo, por lo que el usuario puede no estar seguro de si el proceso de impresión se completó o encontró un problema. Para determinar el estado de un trabajo de impresión, utilice la propiedad PrintStatus. El siguiente fragmento de código le muestra cómo imprimir el archivo PDF en un archivo XPS y obtener el estado de impresión.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void CheckingPrintJobStatus()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    // Instantiate PdfViewer object
    using (var viewer = new Aspose.Pdf.Facades.PdfViewer())
    {
        // Bind PDF document
        viewer.BindPdf(dataDir + "PrintDocument.pdf");

        // Print the file with adjusted size
        viewer.AutoResize = true;

        // Hide printing dialog
        viewer.PrintPageDialog = false;

        // Create Printer Settings object
        var ps = new Aspose.Pdf.Printing.PrinterSettings();
        var pgs = new Aspose.Pdf.Printing.PageSettings();

        // Specify the printer name
        ps.PrinterName = "Microsoft XPS Document Writer";

        // Resultant Printout name
        ps.PrintFileName = dataDir + "CheckingPrintJobStatus_out.xps";

        // Print the output to file
        ps.PrintToFile = true;

        // Set a range of pages to print
        ps.FromPage = 1;
        ps.ToPage = 2;
        ps.PrintRange = Aspose.Pdf.Printing.PrintRange.SomePages;

        // Specify the page size of printout
        pgs.PaperSize = Aspose.Pdf.Printing.PaperSizes.A4;
        ps.DefaultPageSettings.PaperSize = pgs.PaperSize;

        // Specify page margins
        pgs.Margins = new Aspose.Pdf.Devices.Margins(0, 0, 0, 0);

        // Print the document with settings specified above
        viewer.PrintDocumentWithSettings(pgs, ps);

        // Check the print status
        if (viewer.PrintStatus != null)
        {
            // An exception was thrown
            if (viewer.PrintStatus is Exception ex)
            {
                // Get exception message
                Console.WriteLine(ex.Message);
            }
        }
        else
        {
            // No errors were found. Printing job has completed successfully
            Console.WriteLine("Printing completed without any issue.");
        }
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void CheckingPrintJobStatus()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    // Instantiate PdfViewer object
    using var viewer = new Aspose.Pdf.Facades.PdfViewer();

    // Bind PDF document
    viewer.BindPdf(dataDir + "PrintDocument.pdf");

    // Print the file with adjusted size
    viewer.AutoResize = true;

    // Hide printing dialog
    viewer.PrintPageDialog = false;

    // Create Printer Settings object
    var ps = new Aspose.Pdf.Printing.PrinterSettings();
    var pgs = new Aspose.Pdf.Printing.PageSettings();

    // Specify the printer name
    ps.PrinterName = "Microsoft XPS Document Writer";

    // Resultant Printout name
    ps.PrintFileName = dataDir + "CheckingPrintJobStatus_out.xps";

    // Print the output to file
    ps.PrintToFile = true;

    // Set a range of pages to print
    ps.FromPage = 1;
    ps.ToPage = 2;
    ps.PrintRange = Aspose.Pdf.Printing.PrintRange.SomePages;

    // Specify the page size of printout
    pgs.PaperSize = Aspose.Pdf.Printing.PaperSizes.A4;
    ps.DefaultPageSettings.PaperSize = pgs.PaperSize;

    // Specify page margins
    pgs.Margins = new Aspose.Pdf.Devices.Margins(0, 0, 0, 0);

    // Print the document with settings specified above
    viewer.PrintDocumentWithSettings(pgs, ps);

    // Check the print status
    if (viewer.PrintStatus != null)
    {
        // An exception was thrown
        if (viewer.PrintStatus is Exception ex)
        {
            // Get exception message
            Console.WriteLine(ex.Message);
        }
    }
    else
    {
        // No errors were found. Printing job has completed successfully
        Console.WriteLine("Printing completed without any issue.");
    }
}

Obtener/Establecer el nombre del propietario del trabajo de impresión

A veces surge la necesidad de obtener o establecer el nombre del propietario del trabajo de impresión (es decir, el usuario real que presionó un botón de impresión en una página web). Esta información es necesaria al imprimir el archivo PDF. Para cumplir con este requisito, se utiliza la propiedad PrinterJobName.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void SetPrinterJobName()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    // Create PdfViewer object
    using (var viewer = new Aspose.Pdf.Facades.PdfViewer())
    {
        // Bind PDF document
        viewer.BindPdf(dataDir + "PrintDocument.pdf");

        // Specify the name of Print job
        viewer.PrinterJobName = GetCurrentUserCredentials();

        // Fill the necessary settings and print the documents, as shown in examples in this section
    }
}

private static string GetCurrentUserCredentials()
{
    // The implementation depends on type of running application (ASP.NET, Windows forms, etc.)
    var userCredentials = string.Empty;
    return userCredentials;
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void SetPrinterJobName()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    // Create PdfViewer object
    using var viewer = new Aspose.Pdf.Facades.PdfViewer();

    // Bind PDF document
    viewer.BindPdf(dataDir + "PrintDocument.pdf");

    // Specify the name of Print job
    viewer.PrinterJobName = GetCurrentUserCredentials();

    // Fill the necessary settings and print the documents, as shown in examples in this section
}

private static string GetCurrentUserCredentials()
{
    // The implementation depends on type of running application (ASP.NET, Windows forms, etc.)
    var userCredentials = string.Empty;
    return userCredentials;
}

Usando suplantación

Otro enfoque para obtener el nombre del propietario del trabajo de impresión es usar suplantación (ejecutar rutinas de impresión en el contexto de otro usuario) o el usuario puede cambiar el nombre del propietario directamente utilizando la rutina SetJob.

Tenga en cuenta que no hay posibilidad de establecer el valor del propietario utilizando la API de impresión de Aspose.PDF por consideraciones de seguridad. La propiedad PrinterJobName puede ser utilizada para establecer el valor de la columna del nombre del documento en la aplicación de impresión del spooler. El fragmento de código compartido anteriormente solo muestra cómo el usuario puede unir el nombre de usuario en la columna del nombre del documento (por ejemplo, utilizando la sintaxis UserName\documentName). Pero el establecimiento de las columnas de propietario puede ser implementado de las siguientes maneras directamente por el usuario:

1. Suplantación. Dado que el valor de la columna del propietario contiene el valor del usuario que ejecuta el código de impresión, hay una forma de invocar la API de impresión de Aspose.PDF dentro del contexto de otro usuario. Por ejemplo, eche un vistazo a la solución descrita aquí. Usando esta clase Impersonator el usuario puede alcanzar su objetivo:

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void PrintWithImpersonation()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    // Create PdfViewer object
    using (var viewer = new Aspose.Pdf.Facades.PdfViewer())
    {
        // Bind PDF document
        viewer.BindPdf(dataDir + "PrintDocument.pdf");

        // Do not produce the page number dialog when printing
        viewer.PrintPageDialog = false;

        // Impersonate another user
        using (new Impersonator("OwnerUserName", "SomeDomain", "OwnerUserPassword"))
        {
            // Set PrinterSettings
            var ps = new Aspose.Pdf.Printing.PrinterSettings();

            // Set the name of the printer
            ps.PrinterName = "Microsoft XPS Document Writer";

            // Pass printer settings object to the method
            viewer.PrintDocumentWithSettings(ps); // OwnerUserName is a value of Owner column in spooler app
        }
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void PrintWithImpersonation()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    // Create PdfViewer object
    using var viewer = new Aspose.Pdf.Facades.PdfViewer();

    // Bind PDF document
    viewer.BindPdf(dataDir + "PrintDocument.pdf");

    // Do not produce the page number dialog when printing
    viewer.PrintPageDialog = false;

    // Impersonate another user
    using var impersonator = new Impersonator("OwnerUserName", "SomeDomain", "OwnerUserPassword");

    // Set PrinterSettings
    var ps = new Aspose.Pdf.Printing.PrinterSettings();

    // Set the name of the printer
    ps.PrinterName = "Microsoft XPS Document Writer";

    // Pass printer settings object to the method
    viewer.PrintDocumentWithSettings(ps); // OwnerUserName is a value of Owner column in spooler app
}

2. Usando la API del spooler y la rutina SetJob

El siguiente fragmento de código muestra cómo imprimir algunas páginas de un archivo PDF en modo Simplex y algunas páginas en modo Dúplex.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
struct PrintingJobSettings
{
    public int ToPage { get; set; }
    public int FromPage { get; set; }
    public string OutputFile { get; set; }
    public Aspose.Pdf.Printing.Duplex Mode { get; set; }
}

private static void PrintUsingSpoolerApi()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    int printingJobIndex = 0;
    string outputDir = dataDir;
    var printingJobs = new List<PrintingJobSettings>();

    // Create multiple printing jobs to print different page ranges with different duplex settings
    var printingJob1 = new PrintingJobSettings();
    printingJob1.FromPage = 1;
    printingJob1.ToPage = 3;
    printingJob1.OutputFile = outputDir + "PrintUsingSpoolerApi_p1-3_out.xps";
    printingJob1.Mode = Aspose.Pdf.Printing.Duplex.Default;

    printingJobs.Add(printingJob1);

    PrintingJobSettings printingJob2 = new PrintingJobSettings();
    printingJob2.FromPage = 4;
    printingJob2.ToPage = 6;
    printingJob2.OutputFile = outputDir + "PrintUsingSpoolerApi_p4-6_out.xps";
    printingJob2.Mode = Aspose.Pdf.Printing.Duplex.Simplex;

    printingJobs.Add(printingJob2);

    PrintingJobSettings printingJob3 = new PrintingJobSettings();
    printingJob3.FromPage = 7;
    printingJob3.ToPage = 7;
    printingJob3.OutputFile = outputDir + "PrintUsingSpoolerApi_p7_out.xps";
    printingJob3.Mode = Aspose.Pdf.Printing.Duplex.Default;

    printingJobs.Add(printingJob3);

    // Create PdfViewer object
    using (var viewer = new Aspose.Pdf.Facades.PdfViewer())
    {
        // Bind PDF document
        viewer.BindPdf(dataDir + "Print-PageRange.pdf");

        // Set attributes for printing
        // Print the file with adjusted size
        viewer.AutoResize = true;
        // Print the file with adjusted rotation
        viewer.AutoRotate = true;
        // Do not produce the page number dialog when printing
        viewer.PrintPageDialog = false;

        // Create objects for printer and page settings
        var ps = new Aspose.Pdf.Printing.PrinterSettings();
        var pgs = new Aspose.Pdf.Printing.PageSettings();

        // Set printer name
        ps.PrinterName = "Microsoft XPS Document Writer";

        // Set output file name and PrintToFile attribute
        ps.PrintFileName = Path.GetFullPath(printingJobs[printingJobIndex].OutputFile);
        ps.PrintToFile = true;

        // Set parameters for the first print job
        ps.FromPage = printingJobs[printingJobIndex].FromPage;
        ps.ToPage = printingJobs[printingJobIndex].ToPage;
        ps.Duplex = printingJobs[printingJobIndex].Mode;
        ps.PrintRange = Aspose.Pdf.Printing.PrintRange.SomePages;

        // Set paper size and margins
        pgs.PaperSize = Aspose.Pdf.Printing.PaperSizes.A4;
        ps.DefaultPageSettings.PaperSize = pgs.PaperSize;
        pgs.Margins = new Aspose.Pdf.Devices.Margins(0, 0, 0, 0);

        // Chain other print jobs at the end of the finished job
        viewer.EndPrint += (sender, args) =>
        {
            if (++printingJobIndex < printingJobs.Count)
            {
                // Set the next print job parameters
                ps.PrintFileName = Path.GetFullPath(printingJobs[printingJobIndex].OutputFile);
                ps.FromPage = printingJobs[printingJobIndex].FromPage;
                ps.ToPage = printingJobs[printingJobIndex].ToPage;
                ps.Duplex = printingJobs[printingJobIndex].Mode;

                // Run the next print job
                viewer.PrintDocumentWithSettings(pgs, ps);
            }
        };

        // Run the first print job
        viewer.PrintDocumentWithSettings(pgs, ps);
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET

struct PrintingJobSettings
{
    public int ToPage { get; set; }
    public int FromPage { get; set; }
    public string OutputFile { get; set; }
    public Aspose.Pdf.Printing.Duplex Mode { get; set; }
}

private static void PrintUsingSpoolerApi()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_Printing();

    int printingJobIndex = 0;
    var printingJobs = new List<PrintingJobSettings>();

    // Create multiple printing jobs to print different page ranges with different duplex settings
    var printingJob1 = new PrintingJobSettings();
    printingJob1.FromPage = 1;
    printingJob1.ToPage = 3;
    printingJob1.OutputFile = dataDir + "PrintUsingSpoolerApi_p1-3_out.xps";
    printingJob1.Mode = Aspose.Pdf.Printing.Duplex.Default;

    printingJobs.Add(printingJob1);

    PrintingJobSettings printingJob2 = new PrintingJobSettings();
    printingJob2.FromPage = 4;
    printingJob2.ToPage = 6;
    printingJob2.OutputFile = dataDir + "PrintUsingSpoolerApi_p4-6_out.xps";
    printingJob2.Mode = Aspose.Pdf.Printing.Duplex.Simplex;

    printingJobs.Add(printingJob2);

    PrintingJobSettings printingJob3 = new PrintingJobSettings();
    printingJob3.FromPage = 7;
    printingJob3.ToPage = 7;
    printingJob3.OutputFile = dataDir + "PrintUsingSpoolerApi_p7_out.xps";
    printingJob3.Mode = Aspose.Pdf.Printing.Duplex.Default;

    printingJobs.Add(printingJob3);

    // Create PdfViewer object
    using var viewer = new Aspose.Pdf.Facades.PdfViewer();

    // Bind PDF document
    viewer.BindPdf(dataDir + "Print-PageRange.pdf");

    // Set attributes for printing
    // Print the file with adjusted size
    viewer.AutoResize = true;
    // Print the file with adjusted rotation
    viewer.AutoRotate = true;
    // Do not produce the page number dialog when printing
    viewer.PrintPageDialog = false;

    // Create objects for printer and page settings
    var ps = new Aspose.Pdf.Printing.PrinterSettings();
    var pgs = new Aspose.Pdf.Printing.PageSettings();

    // Set printer name
    ps.PrinterName = "Microsoft XPS Document Writer";

    // Set output file name and PrintToFile attribute
    ps.PrintFileName = Path.GetFullPath(printingJobs[printingJobIndex].OutputFile);
    ps.PrintToFile = true;

    // Set parameters for the first print job
    ps.FromPage = printingJobs[printingJobIndex].FromPage;
    ps.ToPage = printingJobs[printingJobIndex].ToPage;
    ps.Duplex = printingJobs[printingJobIndex].Mode;
    ps.PrintRange = Aspose.Pdf.Printing.PrintRange.SomePages;

    // Set paper size and margins
    pgs.PaperSize = Aspose.Pdf.Printing.PaperSizes.A4;
    ps.DefaultPageSettings.PaperSize = pgs.PaperSize;
    pgs.Margins = new Aspose.Pdf.Devices.Margins(0, 0, 0, 0);

    // Chain other print jobs at the end of the finished job
    viewer.EndPrint += (sender, args) =>
    {
        if (++printingJobIndex < printingJobs.Count)
        {
            // Set the next print job parameters
            ps.PrintFileName = Path.GetFullPath(printingJobs[printingJobIndex].OutputFile);
            ps.FromPage = printingJobs[printingJobIndex].FromPage;
            ps.ToPage = printingJobs[printingJobIndex].ToPage;
            ps.Duplex = printingJobs[printingJobIndex].Mode;

            // Run the next print job
            viewer.PrintDocumentWithSettings(pgs, ps);
        }
    };

    // Run the first print job
    viewer.PrintDocumentWithSettings(pgs, ps);
}