Imprimir PDF em aplicativo WPF

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

Impressão direta

A biblioteca Aspose.PDF tem a capacidade de converter arquivos PDF para XPS. Podemos usar essa função para organizar a impressão de documentos. Vamos considerar o exemplo para impressão direta:

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void DirectPrintWpf()
{
    // Select a PDF document to print
    var openFileDialog = new OpenFileDialog
    {
        Filter = "PDF Documents|*.pdf"
    };

    if (openFileDialog.ShowDialog() == true)
    {
        // Open PDF document
        using (var document = new Aspose.Pdf.Document(openFileDialog.FileName))
        {
            using (var memoryStream = new MemoryStream())
            {
                // Convert the document to the XPS format
                document.Save(memoryStream, SaveFormat.Xps);
        
                // Create XPS package
                using (var package = Package.Open(memoryStream))
                {
                    //Create URI for the XPS package
                    //Any Uri will actually be fine here. It acts as a placeholder for the
                    //Uri of the package inside the PackageStore
                    var inMemoryPackageName = $"memorystream://{Guid.NewGuid()}.xps";
                    var packageUri = new Uri(inMemoryPackageName);
        
                    //Add the package to PackageStore
                    PackageStore.AddPackage(packageUri, package);
        
                    // Open the XPS document from the package
                    using (var xpsDoc = new XpsDocument(package, CompressionOption.Maximum, inMemoryPackageName))
                    {
                        // Get the root document sequence
                        var fixedDocumentSequence = xpsDoc.GetFixedDocumentSequence();
        
                        // Open a print dialog to set printing options
                        var printDialog = new PrintDialog();
                        if (printDialog.ShowDialog() == true)
                        {
                            if (fixedDocumentSequence != null)
                            {
                                // Print converted document
                                printDialog.PrintDocument(fixedDocumentSequence.DocumentPaginator,
                                    "A fixed document");
                            }
                        }
        
                        // Remove the package from the store and close the document after the print
                        PackageStore.RemovePackage(packageUri);
                    }
                }
            }
        }
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void DirectPrintWpf()
{
    // Select a PDF document to print
    var openFileDialog = new OpenFileDialog
    {
        Filter = "PDF Documents|*.pdf"
    };

    if (openFileDialog.ShowDialog())
    {
        // Open PDF document
        using var document = new Aspose.Pdf.Document(openFileDialog.FileName);
        
        // Convert the document to the XPS format
        using var memoryStream = new MemoryStream();
        document.Save(memoryStream, SaveFormat.Xps);
        
        // Create XPS package
        using var package = Package.Open(memoryStream);
        
        //Create URI for the XPS package
        //Any Uri will actually be fine here. It acts as a placeholder for the
        //Uri of the package inside the PackageStore
        var inMemoryPackageName = $"memorystream://{Guid.NewGuid()}.xps";
        var packageUri = new Uri(inMemoryPackageName);
        
        //Add the package to PackageStore
        PackageStore.AddPackage(packageUri, package);
        
        // Open the XPS document from the package
        using var xpsDoc = new XpsDocument(package, CompressionOption.Maximum, inMemoryPackageName);
        
        // Get the root document sequence
        var fixedDocumentSequence = xpsDoc.GetFixedDocumentSequence();
        
        // Open a print dialog to set printing options
        var printDialog = new PrintDialog();
        if (printDialog.ShowDialog() == true)
        {
            if (fixedDocumentSequence != null)
            {
                // Print converted document
                printDialog.PrintDocument(fixedDocumentSequence.DocumentPaginator,
                    "A fixed document");
            }
        }
        
        // Remove the package from the store and close the document after the print
        PackageStore.RemovePackage(packageUri);
    }
}

Neste caso, seguiremos estas etapas:

1. Abra o arquivo PDF usando OpenFileDialog.
2. Converta PDF para XPS e armazene-o no objeto MemoryStream.
3. Associe o objeto MemoryStream ao pacote Xps.
4. Adicione o pacote ao Armazenamento de Pacotes.
5. Crie um XpsDocument com base no pacote.
6. Obtenha uma instância do FixedDocumentSequence.
7. Envie essa sequência para a impressora usando PrintDialog.

Visualizar e imprimir documento

Em muitos casos, os usuários querem ver o documento antes de imprimir. Para implementar uma visualização, podemos usar um controle DocumentViewer. A maioria das etapas para implementar essa abordagem é semelhante ao exemplo anterior.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void PreviewDocumentWithDocumentViewer(DocumentViewer docViewer)
{
    // Select a PDF document to print
    var openFileDialog = new OpenFileDialog
    {
        Filter = "PDF Documents|*.pdf"
    };

    if (openFileDialog.ShowDialog() == true)
    {
        // Open PDF document
        using (var document = new Aspose.Pdf.Document(openFileDialog.FileName))
        {
            using (var memoryStream = new MemoryStream())
            {
                // Convert the document to the XPS format
                document.Save(memoryStream, SaveFormat.Xps);

                // Create XPS package
                using (var package = Package.Open(memoryStream))
                {
                    //Create URI for the XPS package
                    var inMemoryPackageName = $"memorystream://{Guid.NewGuid()}.xps";
                    var packageUri = new Uri(inMemoryPackageName);

                    //Add package to PackageStore
                    PackageStore.AddPackage(packageUri, package);

                    // Open the XPS document from the package
                    using (var xpsDoc = new XpsDocument(package, CompressionOption.Maximum, inMemoryPackageName))
                    {
                        // Display the document in the DocumentViewer
                        docViewer.Document = xpsDoc.GetFixedDocumentSequence();
                    }
                }
            }
        }
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void PreviewDocumentWithDocumentViewer(DocumentViewer docViewer)
{
    // Select a PDF document to print
    var openFileDialog = new OpenFileDialog
    {
        Filter = "PDF Documents|*.pdf"
    };

    if (openFileDialog.ShowDialog() == true)
    {
        // Open PDF document
        using var document = new Aspose.Pdf.Document(openFileDialog.FileName);

        // Convert the document to the XPS format
        using var memoryStream = new MemoryStream();
        document.Save(memoryStream, SaveFormat.Xps);

        // Create XPS package
        using var package = Package.Open(memoryStream);

        //Create URI for the XPS package
        var inMemoryPackageName = $"memorystream://{Guid.NewGuid()}.xps";
        var packageUri = new Uri(inMemoryPackageName);

        //Add package to PackageStore
        PackageStore.AddPackage(packageUri, package);

        // Open the XPS document from the package
        using var xpsDoc = new XpsDocument(package, CompressionOption.Maximum, inMemoryPackageName);

        // Display the document in the DocumentViewer
        docViewer.Document = xpsDoc.GetFixedDocumentSequence();
    }
}