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Topic: Performance - create large pdf file from template
Conf: (P-PDF) Developers, Msg: 55675
From: ymak
Date: 5/29/2002 05:14 PM

I am trying to generate a lots of pages for one PDF file by populating one template form from VB. At first I use the following code to do this:

Private Sub CreatePDF()

dim outFDFDoc as FDFACXLib.FdfDoc
dim outFDFApp as FDFACXLib.FdfApp
dim rst as ADODB.Recordset

dim PDFAV as CAcroAVDoc
dim PDFPD as CAcroPVDoc
dim PDFApp as CAcroApp

'*** create a FDF file ***
set outFDFApp = CreateObject("FDFACXLib.FDFApp")
set outFDFDoc = outFDFApp.create
'*** loop through the recordset, create a new page per record ***
do until rst.eof
NewPage outFDFDoc,rst
end sub
'*** save the FDF file ***
outFDFDoc.SaveToFile strFDFfile
'*** open the FDF file, which will convert the FDF into a PDF file ***
'*** however, the conversion time geometrically increases as the pages in the FDF grows
set PDFAV = CreateObject("AcroExch.AVDoc") strFDFfile,""
'*** save as PDF file ***
PDFPD.Save strPDFfile
PDFAV.Close True

End Sub

private sub NewPage(byref outFDFDoc as FdfDoc, byref rst as ADODB.Recordset)
'*** add a new page ***
outFDFDoc.FDFAddTemplate true,strTemplateFile,strTemplateName,true
'*** set values ***
outFDFDoc.FDFSetValue "field1",rst.fields("field1").value,false
outFDFDoc.FDFSetValue "field2",rst.fields("field2").value,false
end sub

I encountered a serious performance penalty if the FDF contains many pages. It takes forever for acrobat to open a FDF file with 300 pages.

Then, I tried another way to do this by setting values for the template PDF file and then insert it into the final PDF file. This time, I could even make the program working. The reason that I didn't use the "AddTemplate" method to generate new page is that the PDF created by "AddTemplate" method cannot be inserted into a classic PDF file. So, I use the Acrobat Form Add-in to set value for a new page, then insert it into PDF file. However, the values set at the last page always overwrite the values in the previous pages. It's because all the pages are created from the same PDF file and contain the same form fields. When I set value for one field in one page, all the fields with the same name in all pages are reset to that value. This isn't what I want. But I couldn't find any documentation telling me how to rename the field name.

Any suggestions will be greatly appreciated.

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