Conversão de PDF para PostScript

O seguinte trecho de código também funciona com a biblioteca Aspose.PDF.Drawing.

PDF Para Postscript em C#

A classe PdfViewer fornece a capacidade de imprimir documentos PDF e, com a ajuda dessa classe, também podemos converter arquivos PDF para o formato PostScript. Para converter um arquivo PDF em PostScript, primeiro instale qualquer impressora PS e apenas imprima para arquivo com a ajuda do PdfViewer. Para instalar uma impressora PS, consulte as instruções fornecidas pelo fornecedor da sua impressora. O seguinte trecho de código mostra como imprimir e converter um PDF para o 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);
}

Verificando o Status do Trabalho de Impressão

Um arquivo PDF pode ser impresso em uma impressora física, bem como no Microsoft XPS Document Writer, sem mostrar uma caixa de diálogo de impressão, usando a classe PdfViewer. Ao imprimir arquivos PDF grandes, o processo pode demorar um pouco, então o usuário pode não ter certeza se o processo de impressão foi concluído ou encontrou um problema. Para determinar o status de um trabalho de impressão, use a propriedade PrintStatus. O seguinte trecho de código mostra como imprimir o arquivo PDF em um arquivo XPS e obter o status da impressão.

.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.");
    }
}

Obter/Definir Nome do Proprietário do Trabalho de Impressão

Às vezes, há a necessidade de obter ou definir o nome do proprietário do trabalho de impressão (ou seja, o usuário real que pressionou o botão de impressão em uma página da web). Essa informação é necessária ao imprimir o arquivo PDF. Para atender a essa necessidade, a propriedade PrinterJobName é utilizada.

.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 Impersonação

Outra abordagem para obter o nome do proprietário do trabalho de impressão é usar impersonação (executar rotinas de impressão em outro contexto de usuário) ou o usuário pode alterar o nome do proprietário diretamente usando a rotina SetJob.

Por favor, note que não há possibilidade de definir o valor do proprietário usando a API de impressão Aspose.PDF por considerações de segurança. A propriedade PrinterJobName pode ser usada para definir o valor da coluna do nome do documento na aplicação de impressão spooler. O trecho de código compartilhado acima apenas mostra como o usuário pode juntar o nome do usuário na coluna do nome do documento (por exemplo, usando a sintaxe UserName\documentName). Mas a configuração das colunas do Proprietário pode ser implementada das seguintes maneiras diretamente pelo usuário:

1. Impersonação. Como o valor da coluna do proprietário contém o valor do usuário que executa o código de impressão, há uma maneira de invocar a API de impressão Aspose.PDF dentro de outro contexto de usuário. Por exemplo, veja a solução descrita aqui. Usando esta classe Impersonator, o usuário pode alcançar o 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 a API Spooler e a rotina SetJob

O seguinte trecho de código mostra como imprimir algumas páginas de um arquivo PDF em modo Simples e algumas páginas em modo Duplex.

.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);
}