COM
GemBox.Pdf can be used in other programming languages through COM. Due to the COM limitations, GemBox.Pdf exposes a ComHelper class that provides overrides for some API members not supported through COM.
The following example shows how you can read a PDF file, merge multiple PDF files into a single PDF and split a single PDF into multiple PDF files.
Notes
- GemBox.Pdf assembly needs to be registered in order for this example to work. You can find more information about COM registration here.
- Python code requires the pywin32 extension to be installed.
Wrapper assembly
If you need to use many GemBox.Pdf classes and methods via COM Interop, consider creating a .NET wrapper assembly that does all the work within and exposes a minimal set of classes and methods to the unmanaged code. This will enable you to avoid various COM limitations and take advantage of GemBox.Pdf's full capabilities.
# Create ComHelper object and set license.
# NOTE: If you're using a Professional version you'll need to put your serial key below.
import win32com.client as COM
comHelper = COM.Dispatch("GemBox.Pdf.ComHelper")
comHelper.ComSetLicense("FREE-LIMITED-KEY")
fileNames = ["\\%#MergeFile01.pdf%", "\\%#MergeFile02.pdf%", "\\%#MergeFile03.pdf%"]
# EXAMPLE 1: Load PDF file and read text content from each page.
import os
document1 = comHelper.Load(os.getcwd() + fileNames[0])
pages1 = document1.Pages
for i1 in range(pages1.Count):
page = pages1.Item(i1)
print(page.Content.ToString() + "\n")
document1.Dispose()
# EXAMPLE 2: Merge multiple PDF files into a single PDF file.
document2 = COM.Dispatch("GemBox.Pdf.PdfDocument")
for fileName in fileNames:
sourceDocument = comHelper.Load(os.getcwd() + fileName)
sourcePages = sourceDocument.Pages
for i2 in range(sourcePages.Count):
document2.Pages.AddClone(sourcePages.Item(i2))
sourceDocument.Dispose()
comHelper.Save(document2, os.getcwd() + "\\Merge Files.pdf")
document2.Dispose()
# EXAMPLE 3: Split a single PDF file into multiple PDF files.
document3 = comHelper.Load(os.getcwd() + "\\Merge Files.pdf")
pages3 = document3.Pages
for i3 in range(pages3.Count):
destinationDocument = COM.Dispatch("GemBox.Pdf.PdfDocument")
destinationDocument.Pages.AddClone(pages3.Item(i3))
comHelper.Save(destinationDocument, os.getcwd() + "\\Page" + str(i3) + ".pdf")
destinationDocument.Dispose()
document3.Dispose()// Create ComHelper object and set license.
// NOTE: If you're using a Professional version you'll need to put your serial key below.
$comHelper = new Com("GemBox.Pdf.ComHelper", null, CP_UTF8);
$comHelper->ComSetLicense("FREE-LIMITED-KEY");
$fileNames = array("\\%#MergeFile01.pdf%", "\\%#MergeFile02.pdf%", "\\%#MergeFile03.pdf%");
// EXAMPLE 1: Load PDF file and read text content from each page.
$document1 = $comHelper->Load(getcwd() . $fileNames[0]);
$pages1 = $document1->Pages;
for ($i1 = 0; $i1 < $pages1->Count; $i1++) {
$page = $pages1->Item($i1);
echo $page->Content->ToString() . "<br>";
}
$document1.Dispose();
// EXAMPLE 2: Merge multiple PDF files into a single PDF file.
$document2 = new Com("GemBox.Pdf.PdfDocument", null, CP_UTF8);
foreach ($fileNames as $fileName) {
$sourceDocument = $comHelper->Load(getcwd() . $fileName);
$sourcePages = $sourceDocument->Pages;
for ($i2 = 0; $i2 < $sourcePages->Count; $i2++) {
$document2->Pages->AddClone($sourcePages->Item($i2));
}
$sourceDocument->Dispose();
}
$comHelper->Save($document2, getcwd() . "\\Merge Files.pdf");
$document2->Dispose();
// EXAMPLE 3: Split a single PDF file into multiple PDF files.
$document3 = $comHelper->Load(getcwd() . "\\Merge Files.pdf");
$pages3 = $document3->Pages;
for ($i3 = 0; $i3 < $pages3->Count; $i3++) {
$destinationDocument = new Com("GemBox.Pdf.PdfDocument", null, CP_UTF8);
$destinationDocument->Pages->AddClone($pages3->Item($i3));
$comHelper->Save($destinationDocument, getcwd() . "\\Page" . $i3 . ".pdf");
$destinationDocument->Dispose();
}
$document3->Dispose();' Create ComHelper object and set license.
' NOTE: If you're using a Professional version you'll need to put your serial key below.
Set comHelper = Server.CreateObject("GemBox.Pdf.ComHelper")
comHelper.SetLicense("FREE-LIMITED-KEY")
Dim fileNames : fileNames = Array("\%#MergeFile01.pdf%", "\%#MergeFile02.pdf%", "\%#MergeFile03.pdf%")
' EXAMPLE 1: Load PDF file and read text content from each page.
Set document1 = comHelper.Load(Server.MapPath(".") & fileNames(0))
Set pages1 = document1.Pages
For i1 = 0 To pages1.Count - 1
Set page = pages1.Item(i1)
Response.write(page.Content.ToString() & "<br>")
Next
document1.Dispose()
' EXAMPLE 2: Merge multiple PDF files into a single PDF file.
Set document2 = Server.CreateObject("GemBox.Pdf.PdfDocument")
For i2 = 0 To UBound(fileNames)
Set sourceDocument = comHelper.Load(Server.MapPath(".") & fileNames(i2))
Set sourcePages = sourceDocument.Pages
For j2 = 0 To sourcePages.Count - 1
document2.Pages.AddClone(sourcePages.Item(j2))
Next
sourceDocument.Dispose()
Next
comHelper.Save document2, Server.MapPath(".") & "\Merge Files.pdf"
document2.Dispose()
' EXAMPLE 3: Split a single PDF file into multiple PDF files.
Set document3 = comHelper.Load(Server.MapPath(".") & "\Merge Files.pdf")
Set pages3 = document3.Pages
For i3 = 0 To pages3.Count - 1
Set destinationDocument = Server.CreateObject("GemBox.Pdf.PdfDocument")
destinationDocument.Pages.AddClone(pages3.Item(i3))
comHelper.Save destinationDocument, Server.MapPath(".") & "\Page" & i3 & ".pdf"
destinationDocument.Dispose()
Next
document3.Dispose()