Rotating PDF in C# Using iTextSharp

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acadia534 4 16 41

4 Answers

I am using the below function to split the pdf into two.

Though it is spliting the pdf, the content is appearing upside down. How do I rotate it by 180 degrees.

Please help. below is the code for the same

private static void ExtractPages(string inputFile, string outputFile,

int start, int end)

{

// get input document

PdfReader inputPdf = new PdfReader(inputFile);

// retrieve the total number of pages

int pageCount = inputPdf.NumberOfPages;

if (end < start || end > pageCount)

{

end = pageCount;

}

// load the input document

Document inputDoc =

new Document(inputPdf.GetPageSizeWithRotation(1));

// create the filestream

using (FileStream fs = new FileStream(outputFile, FileMode.Create))

{

// create the output writer

PdfWriter outputWriter = PdfWriter.GetInstance(inputDoc, fs);

inputDoc.Open();

PdfContentByte cb1 = outputWriter.DirectContent;

// copy pages from input to output document

for (int i = start; i <= end; i++)

{

inputDoc.SetPageSize(inputPdf.GetPageSizeWithRotation(1));

inputDoc.NewPage();

PdfImportedPage page =

c# itextsharp

asked Aug 26 '10 at 20:06

I tried your code and it worked fine for me; split pages kept their original orientation.

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Rotating PDF in C# using iTextSharp - Stack Overflow http://stackoverflow.com/questions/3579058/rotating-pd...

1 of 3 2/20/2014 3:39 AM

Jay Riggs28.5k 5 48 77

Jorge61 1 2

A workaround might be to explicitly rotate your pages 180 degrees.

Replace:

cb1.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);

With:

cb1.AddTemplate(page, -1f, 0, 0, -1f,

inputPdf.GetPageSizeWithRotation(i).Width,

inputPdf.GetPageSizeWithRotation(i).Height);

If your call to inputPdf.GetPageRotation(i) returns 180 then you can handle this in the if statementthat follows (using my suggested code for rotation == 180).

answered Aug 27 '10 at 19:23

You should try this. It worked for me:

if (rotation == 90 || rotation == 270)

{

if (rotation == 90)

{

cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation

}

if (rotation == 270)

{

cb.AddTemplate(page, 0, 1.0F, -1.0F, 0, reader.GetPageSizeWithRotation

}

}

else

{

cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);

}

answered Nov 16 '10 at 0:27

I have found the above answers do not rotate correctly for all 4 of the main rotations.

Below is my code to handle 0, 90, 180 and 270 correctly. This has been tested with a PDF rotated in each ofthese directions.

var pageRotation = reader.GetPageRotation(currentPageIndex);

var pageWidth = reader.GetPageSizeWithRotation(currentPageIndex).Width;

var pageHeight = reader.GetPageSizeWithRotation(currentPageIndex).Height;

switch (pageRotation)

{

case 0:

writer.DirectContent.AddTemplate(importedPage, 1f, 0, 0, 1f, 0, 0);

break;

case 90:

writer.DirectContent.AddTemplate(importedPage, 0, -1f, 1f, 0, 0, pageHeight);

break;

case 180:

writer.DirectContent.AddTemplate(importedPage, -1f, 0, 0, -1f, pageWidth, pageHeight


2 of 3 2/20/2014 3:39 AM

TimS389 1 8

Eli Gassert5,632 1 4 14

dayanand1

break;

case 270:

writer.DirectContent.AddTemplate(importedPage, 0, 1f, -1f, 0, pageWidth, 0);

break;

default:

throw new InvalidOperationException(string.Format("Unexpected page rotation: [{0}]."

}

answered Dec 18 '12 at 23:12

A little change in above code old code

case 270:

writer.DirectContent.AddTemplate(importedPage, 0, 1f, -1f, 0, pageWidth, 0);

new code

case 270:

writer.DirectContent.AddTemplate(importedPage, 0, 1f, -1f, 0, pageHeight, 0);

This will fix the issue with 270 degree rotation

edited Feb 27 '13 at 13:35 answered Feb 27 '13 at 13:10

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3 of 3 2/20/2014 3:39 AM

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