PDF: Working with pages of PDF document

In This Topic

PdfPageCollection class represents a page collection of PDF document. The page collection allows to add and insert new pages, reorder and delete existing pages.

Page collection of some specific PDF document can be obtained using PdfDocument.Pages property.
Here is C#/VB.NET code that demonstrates how to get a page count of PDF document:

/// <summary>
/// Returns the number of pages in PDF document.
/// </summary>
/// <param name="pdfFileName">The filename of PDF document.</param>
public static int GetPagesCount(string pdfFileName)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document = 
        new Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName))
    {
        // get the number of pages
        int pagesCount = document.Pages.Count;
        
        // return number of pages
        return pagesCount;
    }
}

VB.NET

''' <summary>
''' Returns the number of pages in PDF document.
''' </summary>
''' <param name="pdfFileName">The filename of PDF document.</param>
Public Shared Function GetPagesCount(pdfFileName As String) As Integer
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName)
        ' get the number of pages
        Dim pagesCount As Integer = document.Pages.Count

        ' return number of pages
        Return pagesCount
    End Using
End Function

Add/insert PDF pages

New page or existing page of source/another document can be added/inserted into a PDF document.
While coping a page from one PDF document to another will be also copied all objects used by that page.

To add a page to PDF document it is necessary to do the following:

Create or open a PDF document
Obtain a page collection of PDF document
Add a PDF page into the page collection of PDF document
Save changes

Here is C#/VB.NET code that demonstrates how to new blank page to a PDF document:

/// <summary>
/// Adds a new empty page into PDF document.
/// </summary>
/// <param name="pdfFileName">The filename of PDF document.</param>
/// <param name="pageSize">The size of page.</param>
public static void AddEmptyPageToPdfDocument(string pdfFileName, System.Drawing.SizeF pageSize)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document = 
        new Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName))
    {
        // get the collection of pages of PDF document
        Vintasoft.Imaging.Pdf.Tree.PdfPageCollection pages = document.Pages;

        // add an empty page into collection of pages
        pages.Add(pageSize);

        // save changes to a file
        document.SaveChanges();
    }
}

VB.NET

''' <summary>
''' Adds a new empty page into PDF document.
''' </summary>
''' <param name="pdfFileName">The filename of PDF document.</param>
''' <param name="pageSize">The size of page.</param>
Public Shared Sub AddEmptyPageToPdfDocument(pdfFileName As String, pageSize As System.Drawing.SizeF)
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName)
        ' get the collection of pages of PDF document
        Dim pages As Vintasoft.Imaging.Pdf.Tree.PdfPageCollection = document.Pages

        ' add an empty page into collection of pages
        pages.Add(pageSize)

        ' save changes to a file
        document.SaveChanges()
    End Using
End Sub

Here is C#/VB.NET code that demonstrates how to add a new image-only page to PDF document:

/// <summary>
/// Adds new image-only PDF page into a PDF document.
/// </summary>
/// <param name="pdfFileName">The filename of PDF document.</param>
/// <param name="image">The image of the page.</param>
public static void AddImageOnlyPdfPageToPdfDocument(
    string pdfFileName, 
    Vintasoft.Imaging.VintasoftImage image)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document = 
        new Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName))
    {
        // get the collection of pages of PDF document
        Vintasoft.Imaging.Pdf.Tree.PdfPageCollection pages = document.Pages;

        // add page with specified image into collection of pages
        pages.Add(image);

        // save changes to a file
        document.SaveChanges();
    }
}

VB.NET

''' <summary>
''' Adds new image-only PDF page into a PDF document.
''' </summary>
''' <param name="pdfFileName">The filename of PDF document.</param>
''' <param name="image">The image of the page.</param>
Public Shared Sub AddImageOnlyPdfPageToPdfDocument(pdfFileName As String, image As Vintasoft.Imaging.VintasoftImage)
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName)
        ' get the collection of pages of PDF document
        Dim pages As Vintasoft.Imaging.Pdf.Tree.PdfPageCollection = document.Pages

        ' add page with specified image into collection of pages
        pages.Add(image)

        ' save changes to a file
        document.SaveChanges()
    End Using
End Sub

Here is C#/VB.NET code that demonstrates how to copy the first page of PDF document to the end of the same PDF document:

/// <summary>
/// Copies the first page of PDF document to the end of PDF document.
/// </summary>
/// <param name="pdfFileName">The filename of PDF document.</param>
public static void CopyFirstPdfPageToEndOfPdfDocument(string pdfFileName)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document = 
        new Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName))
    {
        // get the collection of pages of PDF document
        Vintasoft.Imaging.Pdf.Tree.PdfPageCollection pages = document.Pages;

        // add first page to the end of PDF document
        pages.Add(pages[0]);

        // save changes to a file
        document.SaveChanges();
    }
}

VB.NET

''' <summary>
''' Copies the first page of PDF document to the end of PDF document.
''' </summary>
''' <param name="pdfFileName">The filename of PDF document.</param>
Public Shared Sub CopyFirstPdfPageToEndOfPdfDocument(pdfFileName As String)
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName)
        ' get the collection of pages of PDF document
        Dim pages As Vintasoft.Imaging.Pdf.Tree.PdfPageCollection = document.Pages

        ' add first page to the end of PDF document
        pages.Add(pages(0))

        ' save changes to a file
        document.SaveChanges()
    End Using
End Sub

Here is C#/VB.NET code that demonstrates how to copy all pages of PDF document to the end of another PDF document:

/// <summary>
/// Copies all pages of source PDF document to the end of destination PDF document.
/// </summary>
/// <param name="srcPdfFileName">The filename of source PDF document.</param>
/// <param name="destPdfFileName">The filename of destination PDF document.</param>
public static void CopyPagesFromOnePdfDocumentToAnother(string srcPdfFileName, string destPdfFileName)
{
    // open source PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument srcDocument = 
        new Vintasoft.Imaging.Pdf.PdfDocument(srcPdfFileName))
    {
        // open destination PDF document
        using (Vintasoft.Imaging.Pdf.PdfDocument destDocument = 
            new Vintasoft.Imaging.Pdf.PdfDocument(destPdfFileName))
        {
            // get pages of source PDF document as array
            Vintasoft.Imaging.Pdf.Tree.PdfPage[] srcDocumentPages = srcDocument.Pages.ToArray();

            // append the array of PDF pages to the destination PDF document
            destDocument.Pages.AddRange(srcDocumentPages);

            // save changes to a file
            destDocument.SaveChanges();
        }
    }
}

VB.NET

''' <summary>
''' Copies all pages of source PDF document to the end of destination PDF document.
''' </summary>
''' <param name="srcPdfFileName">The filename of source PDF document.</param>
''' <param name="destPdfFileName">The filename of destination PDF document.</param>
Public Shared Sub CopyPagesFromOnePdfDocumentToAnother(srcPdfFileName As String, destPdfFileName As String)
    ' open source PDF document
    Using srcDocument As New Vintasoft.Imaging.Pdf.PdfDocument(srcPdfFileName)
        ' open destination PDF document
        Using destDocument As New Vintasoft.Imaging.Pdf.PdfDocument(destPdfFileName)
            ' get pages of source PDF document as array
            Dim srcDocumentPages As Vintasoft.Imaging.Pdf.Tree.PdfPage() = srcDocument.Pages.ToArray()

            ' append the array of PDF pages to the destination PDF document
            destDocument.Pages.AddRange(srcDocumentPages)

            ' save changes to a file
            destDocument.SaveChanges()
        End Using
    End Using
End Sub

Add/insert image-only PDF pages

A new image-only PDF page, page based on image, can be added/inserted into a PDF document.

Here is C#/VB.NET code that demonstrates how to add images to a PDF document using PdfDocument class:

public static void AddImagesToPdf(string pdfFilename, 
    Vintasoft.Imaging.ImageCollection images)
{
    using (Vintasoft.Imaging.Pdf.PdfDocument document = 
        new Vintasoft.Imaging.Pdf.PdfDocument(pdfFilename))
    {
        // add images to PDF document using LZW compression
        for (int i = 0; i < images.Count; i++)
            document.Pages.Add(images[i], Vintasoft.Imaging.Pdf.PdfCompression.Lzw);
        // save document changes
        document.SaveChanges();
    }
}

VB.NET

Public Shared Sub AddImagesToPdf(pdfFilename As String, images As Vintasoft.Imaging.ImageCollection)
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(pdfFilename)
        ' add images to PDF document using LZW compression
        For i As Integer = 0 To images.Count - 1
            document.Pages.Add(images(i), Vintasoft.Imaging.Pdf.PdfCompression.Lzw)
        Next
        ' save document changes
        document.SaveChanges()
    End Using
End Sub

Here is C#/VB.NET code that demonstrates how to add images to a PDF document using PdfEncoder class:

public static void AddImagesToPdf(string pdfFilename, 
    Vintasoft.Imaging.ImageCollection images)
{
    using (Vintasoft.Imaging.Codecs.Encoders.PdfEncoder encoder = 
        new Vintasoft.Imaging.Codecs.Encoders.PdfEncoder(false))
    {
        // use LZW compression
        encoder.Settings.Compression = Vintasoft.Imaging.Codecs.Encoders.PdfImageCompression.Lzw;
        // add images to PDF document
        using (System.IO.Stream stream = new System.IO.FileStream(
            pdfFilename, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite))
        {
            encoder.SaveImages(images, stream);
        }
    }
}

VB.NET

Public Shared Sub AddImagesToPdf(pdfFilename As String, images As Vintasoft.Imaging.ImageCollection)
    Using encoder As New Vintasoft.Imaging.Codecs.Encoders.PdfEncoder(False)
        ' use LZW compression
        encoder.Settings.Compression = Vintasoft.Imaging.Codecs.Encoders.PdfImageCompression.Lzw
        ' add images to PDF document
        Using stream As System.IO.Stream = New System.IO.FileStream(pdfFilename, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite)
            encoder.SaveImages(images, stream)
        End Using
    End Using
End Sub

Reorder PDF pages

PdfPageCollection class is a collection that provides the ability to reorder the elements of collection - pages of PDF document.
To reorder pages of PDF document it is necessary to do the following:

Open a PDF document
Obtain a page collection of PDF document
Reorder pages
Save changes

Here is C#/VB.NET code that demonstrates how to reorder pages of PDF document:

/// <summary>
/// Swaps the first and the last pages of PDF document.
/// </summary>
/// <param name="pdfFileName">The filename of PDF document.</param>
public static void SwapPages(string pdfFileName)
{
    // open PDF documnet
    using (Vintasoft.Imaging.Pdf.PdfDocument document =
        new Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName))
    {
        // get the collection of pages of PDF document
        Vintasoft.Imaging.Pdf.Tree.PdfPageCollection pages = document.Pages;

        // get the page count
        int pagesCount = pages.Count;
        // swap the first and the last pages
        pages.Swap(0, pagesCount - 1);

        // save changes to a file
        document.SaveChanges();
    }
}

VB.NET

''' <summary>
''' Swaps the first and the last pages of PDF document.
''' </summary>
''' <param name="pdfFileName">The filename of PDF document.</param>
Public Shared Sub SwapPages(pdfFileName As String)
    ' open PDF documnet
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(pdfFileName)
        ' get the collection of pages of PDF document
        Dim pages As Vintasoft.Imaging.Pdf.Tree.PdfPageCollection = document.Pages

        ' get the page count
        Dim pagesCount As Integer = pages.Count
        ' swap the first and the last pages
        pages.Swap(0, pagesCount - 1)

        ' save changes to a file
        document.SaveChanges()
    End Using
End Sub

Delete PDF pages

A page of PDF document can be deleted virtually or physically. By virtual deleting the page is removed from the list of pages, but its data remain untouched. By physical deleting the page is completely removed with all its data.

To perform the virtual deleting of PDF page it is necessary to do the following:

Open a PDF document
Obtain a page collection of PDF document
Remove one or more pages
Save changes

Here is C#/VB.NET code that demonstrates how to remove a PDF page virtually:

public void VirtuallyRemovePageFromPDFDocument(string filename, int pageIndex)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document = 
        new Vintasoft.Imaging.Pdf.PdfDocument(filename))
    {
        // remove page at specified index
        document.Pages.RemoveAt(pageIndex);
        // save changes
        document.SaveChanges();
    }
}

VB.NET

Public Sub VirtuallyRemovePageFromPDFDocument(filename As String, pageIndex As Integer)
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(filename)
        ' remove page at specified index
        document.Pages.RemoveAt(pageIndex)
        ' save changes
        document.SaveChanges()
    End Using
End Sub

To perform the physical deleting of PDF page it is necessary to do the following:

Open a PDF document
Obtain a page collection of PDF document
Remove one or more pages
Pack PDF document

Here is C#/VB.NET code that demonstrates how to remove a PDF page physically:

public void PhysicallyRemovePageFromPDFDocument(string filename, int pageIndex)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document = 
        new Vintasoft.Imaging.Pdf.PdfDocument(filename))
    {
        // remove page at specified index
        document.Pages.RemoveAt(pageIndex);
        // pack document
        document.Pack();
    }
}

VB.NET

Public Sub PhysicallyRemovePageFromPDFDocument(filename As String, pageIndex As Integer)
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(filename)
        ' remove page at specified index
        document.Pages.RemoveAt(pageIndex)
        ' pack document
        document.Pack()
    End Using
End Sub

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