Document Merge

Merge two or more PDF documents using the MergeDocument class. Also use the MergeDocument class to append a document to an existing MergeDocument instance. When merging, the MergeDocument class can use a file path, stream, or byte array to import the existing PDF.

MergeDocument Class

The MergeDocument class merges a pre-existing PDF with another PDF to create a new merged PDF.

Merging Two Documents

The following code illustrates merging two PDF documents.

MergeDocument document = MergeDocument.Merge( pdfFilePath, pdfFilePath );
document.Draw(pdfFilePath);        

Dim MyDocument As MergeDocument = MergeDocument.Merge( pdfFilePath, pdfFilePath )
MyDocument.Draw(pdfFilePath)   

Appending Documents

The following code loads a PDF document, appends a range of pages from one document to it, and then appends another document to the PDF.

MergeDocument document = new MergeDocument(pdfFilePath);
document.Append(pdfFilePath, 1, 2 );
document.Append(pdfFilePath);
document.Draw(pdfFilePath);        

Dim MyDocument As MergeDocument = New MergeDocument( pdfFilePath )
MyDocument.Append(pdfFilePath, 1, 2 )
MyDocument.Append(pdfFilePath)
MyDocument.Draw(pdfFilePath)   

Importing From Streams

The following code shows the previous example reworked to use stream objects rather than files.

// StreamX variable are stream object.
MergeDocument document = new MergeDocument( new PdfDocument( streamA ) );
document.Append( new PdfDocument( streamB ), 1, 2 );
document.Append( new PdfDocument( streamC ) );
document.Draw(pdfFilePath);        

' MyStreamX variable are stream object.
Dim MyDocument As MergeDocument = New MergeDocument( New PdfDocument( MyStreamA ) )
MyDocument.Append( New PdfDocument( MyStreamB ), 1, 2 )
MyDocument.Append( New PdfDocument( MyStreamC ) )
MyDocument.Draw(pdfFilePath)   

Importing From a Byte Array

The following code shows how to perform the previous example using byte arrays instead of files.

// DataX variable are byte arrays.
MergeDocument document = new MergeDocument( new PdfDocument( dataA ) );
document.Append( new PdfDocument( dataB ), 1, 2 );
document.Append( new PdfDocument( dataC ) );
document.Draw(pdfFilePath);        

' MyDataX variable are byte arrays.
Dim MyDocument As MergeDocument = New MergeDocument( New PdfDocument( MyDataA ) )
MyDocument.Append( New PdfDocument( MyDataB ), 1, 2 )
MyDocument.Append( New PdfDocument( MyDataC ) )
MyDocument.Draw(pdfFilePath)