Anzeigen eines Druckdialogfelds (WPF .NET)

Möchten Sie von Ihrer Anwendung aus drucken? Sie können die PrintDialog-Klasse verwenden, um ein standardmäßiges Microsoft Windows-Druckdialogfeld zu öffnen. Gehen Sie folgendermaßen vor:

Die PrintDialog-Klasse bietet ein einzelnes Steuerelement für die Druckkonfiguration und Druckauftragsübermittlung. Das Steuerelement ist einfach zu verwenden und kann mithilfe von XAML-Markup oder Code instanziiert werden. In den folgenden Beispielen wird eine PrintDialog-Instanz mithilfe von Code erstellt und angezeigt.

Sie können das Druckdialogfeld verwenden, um Druckoptionen zu konfigurieren, z. B.:

• Nur einen bestimmten Seitenbereich drucken.
• Einen auf Ihrem Computer installierten Drucker auswählen. Sie können die Option Microsoft XPS Document Writer verwenden, um diese Dokumenttypen zu erstellen:
  • XML Paper Specification (XPS)
  • Open XML Paper Specification (OpenXPS)

Drucken des gesamten Dokuments

In diesem Beispiel werden alle Seiten eines XPS-Dokuments gedruckt. Standardmäßig bewirkt der Code Folgendes:

1. Ein Druckdialogfenster wird geöffnet, in dem der Benutzer aufgefordert wird, einen Drucker auszuwählen und einen Druckauftrag zu starten.
2. Es wird ein XpsDocument-Objekt mit dem Inhalt des XPS-Dokuments instanziiert.
3. Aus dem XpsDocument-Objekt wird ein DocumentPaginator-Objekt generiert, das alle Seiten des XPS-Dokuments enthält.
4. Die PrintDocument-Methode wird aufgerufen und übergibt das DocumentPaginator-Objekt, um alle Seiten an den angegebenen Drucker zu senden.

/// <summary>
/// Print all pages of an XPS document.
/// Optionally, hide the print dialog window.
/// </summary>
/// <param name="xpsFilePath">Path to source XPS file</param>
/// <param name="hidePrintDialog">Whether to hide the print dialog window (shown by default)</param>
/// <returns>Whether the document printed</returns>
public static bool PrintWholeDocument(string xpsFilePath, bool hidePrintDialog = false)
{
    // Create the print dialog object and set options.
    PrintDialog printDialog = new();

    if (!hidePrintDialog)
    {
        // Display the dialog. This returns true if the user presses the Print button.
        bool? isPrinted = printDialog.ShowDialog();
        if (isPrinted != true)
            return false;
    }

    // Print the whole document.
    try
    {
        // Open the selected document.
        XpsDocument xpsDocument = new(xpsFilePath, FileAccess.Read);

        // Get a fixed document sequence for the selected document.
        FixedDocumentSequence fixedDocSeq = xpsDocument.GetFixedDocumentSequence();

        // Create a paginator for all pages in the selected document.
        DocumentPaginator docPaginator = fixedDocSeq.DocumentPaginator;

        // Print to a new file.
        printDialog.PrintDocument(docPaginator, $"Printing {Path.GetFileName(xpsFilePath)}");

        return true;
    }
    catch (Exception e)
    {
        MessageBox.Show(e.Message);

        return false;
    }
}

''' <summary>
''' Print all pages of an XPS document.
''' Optionally, print all pages without showing a print dialog window.
''' </summary>
''' <param name="xpsFilePath">Path to source XPS file</param>
''' <param name="hidePrintDialog">Whether to hide the print dialog window (shown by default)</param>
''' <returns>Whether the document printed</returns>
Public Shared Function PrintWholeDocument(xpsFilePath As String, Optional hidePrintDialog As Boolean = False) As Boolean

    ' Create the print dialog object and set options.
    Dim printDialog As New PrintDialog

    If Not hidePrintDialog Then

        ' Display the dialog. This returns true if the user presses the Print button.
        Dim isPrinted As Boolean? = printDialog.ShowDialog()
        If isPrinted <> True Then Return False

    End If

    ' Print the whole document.
    Try

        ' Open the selected document.
        Dim xpsDocument As New XpsDocument(xpsFilePath, FileAccess.Read)

        ' Get a fixed document sequence for the selected document.
        Dim fixedDocSeq As FixedDocumentSequence = xpsDocument.GetFixedDocumentSequence()

        ' Create a paginator for all pages in the selected document.
        Dim docPaginator As DocumentPaginator = fixedDocSeq.DocumentPaginator

        ' Print to a new file.
        printDialog.PrintDocument(docPaginator, $"Printing {Path.GetFileName(xpsFilePath)}")

        Return True

    Catch e As Exception

        MessageBox.Show(e.Message)

        Return False

    End Try

End Function

Drucken eines Seitenbereichs

Manchmal möchten Sie nur einen bestimmten Seitenbereich in einem XPS-Dokument drucken. Dazu erweitern wir die abstrakte Klasse DocumentPaginator, um Unterstützung für Seitenbereiche hinzuzufügen. Standardmäßig bewirkt der Code Folgendes:

1. Ein Druckdialogfenster wird geöffnet, in dem der Benutzer aufgefordert wird, einen Drucker sowie einen Seitenbereich auszuwählen und einen Druckauftrag zu starten.
2. Es wird ein XpsDocument-Objekt mit dem Inhalt des XPS-Dokuments instanziiert.
3. Aus dem XpsDocument-Objekt wird ein standardmäßiges DocumentPaginator-Objekt generiert, das alle Seiten des XPS-Dokuments enthält.
4. Eine Instanz einer erweiterten DocumentPaginator-Klasse wird erstellt, die Seitenbereiche unterstützt, das Standardobjekt DocumentPaginator und die vom PrintDialog zurückgegebene PageRange-Struktur übergibt.
5. Die PrintDocument-Methode wird aufgerufen und übergibt die Instanz der erweiterten DocumentPaginator-Klassen, um den angegebenen Seitenbereich an den angegebenen Drucker zu senden.

/// <summary>
/// Print a specific range of pages within an XPS document.
/// </summary>
/// <param name="xpsFilePath">Path to source XPS file</param>
/// <returns>Whether the document printed</returns>
public static bool PrintDocumentPageRange(string xpsFilePath)
{
    // Create the print dialog object and set options.
    PrintDialog printDialog = new()
    {
        UserPageRangeEnabled = true
    };

    // Display the dialog. This returns true if the user presses the Print button.
    bool? isPrinted = printDialog.ShowDialog();
    if (isPrinted != true)
        return false;

    // Print a specific page range within the document.
    try
    {
        // Open the selected document.
        XpsDocument xpsDocument = new(xpsFilePath, FileAccess.Read);

        // Get a fixed document sequence for the selected document.
        FixedDocumentSequence fixedDocSeq = xpsDocument.GetFixedDocumentSequence();

        // Create a paginator for all pages in the selected document.
        DocumentPaginator docPaginator = fixedDocSeq.DocumentPaginator;

        // Check whether a page range was specified in the print dialog.
        if (printDialog.PageRangeSelection == PageRangeSelection.UserPages)
        {
            // Create a document paginator for the specified range of pages.
            docPaginator = new DocPaginator(fixedDocSeq.DocumentPaginator, printDialog.PageRange);
        }

        // Print to a new file.
        printDialog.PrintDocument(docPaginator, $"Printing {Path.GetFileName(xpsFilePath)}");

        return true;
    }
    catch (Exception e)
    {
        MessageBox.Show(e.Message);

        return false;
    }
}

/// <summary>
/// Extend the abstract DocumentPaginator class to support page range printing. This class is based on the following online resources:
///
/// https://www.thomasclaudiushuber.com/2009/11/24/wpf-printing-how-to-print-a-pagerange-with-wpfs-printdialog-that-means-the-user-can-select-specific-pages-and-only-these-pages-are-printed/
///
/// https://social.msdn.microsoft.com/Forums/vstudio/en-US/9180e260-0791-4f2d-962d-abcb22ba8d09/how-to-print-multiple-page-ranges-with-wpf-printdialog
///
/// https://social.msdn.microsoft.com/Forums/en-US/841e804b-9130-4476-8709-0d2854c11582/exception-quotfixedpage-cannot-contain-another-fixedpagequot-when-printing-to-the-xps-document?forum=wpf
/// </summary>
public class DocPaginator : DocumentPaginator
{
    private readonly DocumentPaginator _documentPaginator;
    private readonly int _startPageIndex;
    private readonly int _endPageIndex;
    private readonly int _pageCount;

    public DocPaginator(DocumentPaginator documentPaginator, PageRange pageRange)
    {
        // Set document paginator.
        _documentPaginator = documentPaginator;

        // Set page indices.
        _startPageIndex = pageRange.PageFrom - 1;
        _endPageIndex = pageRange.PageTo - 1;

        // Validate and set page count.
        if (_startPageIndex >= 0 &&
            _endPageIndex >= 0 &&
            _startPageIndex <= _documentPaginator.PageCount - 1 &&
            _endPageIndex <= _documentPaginator.PageCount - 1 &&
            _startPageIndex <= _endPageIndex)
            _pageCount = _endPageIndex - _startPageIndex + 1;
    }

    public override bool IsPageCountValid => true;

    public override int PageCount => _pageCount;

    public override IDocumentPaginatorSource Source => _documentPaginator.Source;

    public override Size PageSize { get => _documentPaginator.PageSize; set => _documentPaginator.PageSize = value; }

    public override DocumentPage GetPage(int pageNumber)
    {
        DocumentPage documentPage = _documentPaginator.GetPage(_startPageIndex + pageNumber);

        // Workaround for "FixedPageInPage" exception.
        if (documentPage.Visual is FixedPage fixedPage)
        {
            var containerVisual = new ContainerVisual();
            foreach (object child in fixedPage.Children)
            {
                var childClone = (UIElement)child.GetType().GetMethod("MemberwiseClone", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(child, null);

                FieldInfo parentField = childClone.GetType().GetField("_parent", BindingFlags.Instance | BindingFlags.NonPublic);
                if (parentField != null)
                {
                    parentField.SetValue(childClone, null);
                    containerVisual.Children.Add(childClone);
                }
            }

            return new DocumentPage(containerVisual, documentPage.Size, documentPage.BleedBox, documentPage.ContentBox);
        }

        return documentPage;
    }
}

''' <summary>
''' Print a specific range of pages within an XPS document.
''' </summary>
''' <param name="xpsFilePath">Path to source XPS file</param>
''' <returns>Whether the document printed</returns>
Public Shared Function PrintDocumentPageRange(xpsFilePath As String) As Boolean

    ' Create the print dialog object and set options.
    Dim printDialog As New PrintDialog With {
        .UserPageRangeEnabled = True
    }

    ' Display the dialog. This returns true if the user presses the Print button.
    Dim isPrinted As Boolean? = printDialog.ShowDialog()
    If isPrinted <> True Then Return False

    ' Print a specific page range within the document.
    Try

        ' Open the selected document.
        Dim xpsDocument As New XpsDocument(xpsFilePath, FileAccess.Read)

        ' Get a fixed document sequence for the selected document.
        Dim fixedDocSeq As FixedDocumentSequence = xpsDocument.GetFixedDocumentSequence()

        ' Create a paginator for all pages in the selected document.
        Dim docPaginator As DocumentPaginator = fixedDocSeq.DocumentPaginator

        ' Check whether a page range was specified in the print dialog.
        If printDialog.PageRangeSelection = PageRangeSelection.UserPages Then

            ' Create a document paginator for the specified range of pages.
            docPaginator = New DocPaginator(fixedDocSeq.DocumentPaginator, printDialog.PageRange)

        End If

        ' Print to a new file.
        printDialog.PrintDocument(docPaginator, $"Printing {Path.GetFileName(xpsFilePath)}")

        Return True

    Catch e As Exception

        MessageBox.Show(e.Message)

        Return False

    End Try

End Function

' Extend the abstract DocumentPaginator class to support page range printing.
' This class is based on the following online resources:
' https://www.thomasclaudiushuber.com/2009/11/24/wpf-printing-how-to-print-a-pagerange-with-wpfs-printdialog-
' that-means-the-user-can-select-specific-pages-and-only-these-pages-are-printed/
' https://social.msdn.microsoft.com/Forums/vstudio/en-US/9180e260-0791-4f2d-962d-abcb22ba8d09/how-to-print-
' multiple-page-ranges-with-wpf-printdialog
' https://social.msdn.microsoft.com/Forums/en-US/841e804b-9130-4476-8709-0d2854c11582/exception-quotfixedpage-
' cannot-contain-another-fixedpagequot-when-printing-to-the-xps-document?forum=wpf
Public Class DocPaginator
    Inherits DocumentPaginator

    Private ReadOnly _documentPaginator As DocumentPaginator
    Private ReadOnly _startPageIndex As Integer
    Private ReadOnly _endPageIndex As Integer
    Private ReadOnly _pageCount As Integer

    Public Sub New(documentPaginator As DocumentPaginator, pageRange As PageRange)

        ' Set document paginator.
        _documentPaginator = documentPaginator

        ' Set page indices.
        _startPageIndex = pageRange.PageFrom - 1
        _endPageIndex = pageRange.PageTo - 1

        ' Validate And set page count.
        If _startPageIndex >= 0 AndAlso
            _endPageIndex >= 0 AndAlso
            _startPageIndex <= _documentPaginator.PageCount - 1 AndAlso
            _endPageIndex <= _documentPaginator.PageCount - 1 AndAlso
            _startPageIndex <= _endPageIndex Then
            _pageCount = _endPageIndex - _startPageIndex + 1
        End If

    End Sub

    Public Overrides ReadOnly Property IsPageCountValid As Boolean
        Get
            Return True
        End Get
    End Property

    Public Overrides ReadOnly Property PageCount As Integer
        Get
            Return _pageCount
        End Get
    End Property

    Public Overrides ReadOnly Property Source As IDocumentPaginatorSource
        Get
            Return _documentPaginator.Source
        End Get
    End Property

    Public Overrides Property PageSize As Size
        Get
            Return _documentPaginator.PageSize
        End Get
        Set(value As Size)
            _documentPaginator.PageSize = value
        End Set
    End Property

    Public Overrides Function GetPage(pageNumber As Integer) As DocumentPage

        Dim documentPage As DocumentPage = _documentPaginator.GetPage(_startPageIndex + pageNumber)

        ' Workaround for "FixedPageInPage" exception.
        If documentPage.Visual.GetType() Is GetType(FixedPage) Then

            Dim fixedPage As FixedPage = documentPage.Visual
            Dim containerVisual = New ContainerVisual()

            For Each child As Object In fixedPage.Children
                Dim childClone = CType(child.[GetType]().GetMethod("MemberwiseClone", BindingFlags.Instance Or BindingFlags.NonPublic).Invoke(child, Nothing), UIElement)
                Dim parentField As FieldInfo = childClone.[GetType]().GetField("_parent", BindingFlags.Instance Or BindingFlags.NonPublic)

                If parentField IsNot Nothing Then
                    parentField.SetValue(childClone, Nothing)
                    containerVisual.Children.Add(childClone)
                End If
            Next

            Return New DocumentPage(containerVisual, documentPage.Size, documentPage.BleedBox, documentPage.ContentBox)

        End If

        Return documentPage

    End Function

End Class

Weitere Informationen

• PrintDialog
• Dokumente in WPF
• Drucken einer XPS-Datei
• Übersicht über das Drucken von Dokumenten
• Microsoft XPS-Dokument-Generator