Imprimer un PDF dans une application WPF

Le code suivant fonctionne également avec la bibliothèque Aspose.PDF.Drawing.

Impression directe

La bibliothèque Aspose.PDF a la capacité de convertir des fichiers PDF en XPS. Nous pouvons utiliser cette fonction pour organiser l’impression des documents. Considérons l’exemple d’impression directe :

.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);
    }
}

Dans ce cas, nous suivrons ces étapes :

1. Ouvrir le fichier PDF en utilisant OpenFileDialog.
2. Convertir le PDF en XPS et le stocker dans un objet MemoryStream.
3. Associer l’objet MemoryStream avec le package Xps.
4. Ajouter le package au Package Store.
5. Créer un XpsDocument basé sur le package.
6. Obtenir une instance de FixedDocumentSequence.
7. Envoyer cette séquence à l’imprimante en utilisant PrintDialog.

Voir et imprimer le document

Dans de nombreux cas, les utilisateurs souhaitent voir le document avant de l’imprimer. Pour implémenter une vue, nous pouvons utiliser un contrôle DocumentViewer. La plupart des étapes pour mettre en œuvre cette approche sont similaires à l’exemple précédent.

.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();
    }
}