public int SplitAndSave(string inputPath, string outputPath)
{
FileInfo file = new FileInfo(inputPath);
string name = file.Name.Substring(0, file.Name.LastIndexOf("."));
using (PdfReader reader = new PdfReader(inputPath))
{
for (int pagenumber = 1; pagenumber <= reader.NumberOfPages; pagenumber++)
{
string filename = pagenumber.ToString() + ".pdf";
Document document = new Document();
PdfCopy copy = new PdfCopy(document, new FileStream(outputPath + "\\" + filename, FileMode.Create));
document.Open();
copy.AddPage(copy.GetImportedPage(reader, pagenumber));
document.Close();
}
return reader.NumberOfPages;
}
}
I want to split the Pdf in to multiple PDFs with 50 pages interval.(Suppoose If there are 400 pages PDF, I want 8 pdfs). The above code is splitting every page into a pdf. Please help me...I'm using asp.net with iTextSharp.
You're looping through the pdf and creating a new document every time you advance a page. You'll need to keep track of your pages so that you perform split only every 50 pages. Personally I would put that in a separate method and call it from your loop. Something like this:
private void ExtractPages(string sourcePDFpath, string outputPDFpath, int startpage, int endpage)
{
PdfReader reader = null;
Document sourceDocument = null;
PdfCopy pdfCopyProvider = null;
PdfImportedPage importedPage = null;
reader = new PdfReader(sourcePDFpath);
sourceDocument = new Document(reader.GetPageSizeWithRotation(startpage));
pdfCopyProvider = new PdfCopy(sourceDocument, new System.IO.FileStream(outputPDFpath, System.IO.FileMode.Create));
sourceDocument.Open();
for (int i = startpage; i <= endpage; i++)
{
importedPage = pdfCopyProvider.GetImportedPage(reader, i);
pdfCopyProvider.AddPage(importedPage);
}
sourceDocument.Close();
reader.Close();
}
So in your original code loop through your pdf and every 50 pages call the above method. You'll just need to add variables in your block to keep track of the start/end pages.
this will be of use. very much matches your requirement
http://www.codeproject.com/Articles/559380/SplittingplusandplusMergingplusPdfplusFilesplusinp
Here is a shorter solution. Haven't tested which method has the better performance.
private void ExtractPages(string sourcePDFpath, string outputPDFpath, int startpage, int endpage)
{
var pdfReader = new PdfReader(sourcePDFpath);
try
{
pdfReader.SelectPages($"{startpage}-{endpage}");
using (var fs = new FileStream(outputPDFpath, FileMode.Create, FileAccess.Write))
{
PdfStamper stamper = null;
try
{
stamper = new PdfStamper(pdfReader, fs);
}
finally
{
stamper?.Close();
}
}
}
finally
{
pdfReader.Close();
}
}
I faced the same problem but wanted to use iText7 for .NET. In this concrete case, this code worked for me:
1st: Implement own PdfSplitter
public class MyPdfSplitter : PdfSplitter
{
private readonly string _destFolder;
private int _pageNumber;
public MyPdfSplitter(PdfDocument pdfDocument, string destFolder) : base(pdfDocument)
{
_destFolder = destFolder;
}
protected override PdfWriter GetNextPdfWriter(PageRange documentPageRange)
{
_pageNumber++;
return new PdfWriter(Path.Combine(_destFolder, $"p{_pageNumber}.pdf"));
}
}
2nd: Use it to split your PDF
using (var pdfDoc = new PdfDocument(new PdfReader(filePath)))
{
var splitDocuments = new MyPdfSplitter(pdfDoc, targetFolder).SplitByPageCount(1);
foreach (var splitDocument in splitDocuments)
{
splitDocument.Close();
}
}
Code migrated from Java example: https://itextpdf.com/en/resources/examples/itext-7/splitting-pdf-file
Hope this helps to others!
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