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Is it possible to merge several PDF's into one PDF document in Matlab while controlling the sequence in which the PDF's are merged?

Example:

I have a folder with PDF's:

I want to merge them to one PDF document with the following page mapping:

The above order is just an example, I want to be able to control the sequence in the script.

1 Answer

You could merge your PDF files in the command line using ghostscript, and you can invoke a command line from Matlab using the system operator.

Combining the two you could do:

Not the answer you're looking for? Browse other questions tagged matlabpdf or ask your own question.

I have to merge multiple PDFs into a single PDF.

I am using the iText.sharp library, and collect converted the code and tried to use it (from here)The actual code is in C# and I converted that to VB.NET.

I am now getting the following error:

An item with the same key has already been added.

Business card designer 4 0 serial. I did some debugging and have tracked the problem down to the following lines:

Why is this error happening?

4 Answers

I have a console that monitors individual folders in a designated folder then needs to merge all of the pdf's in that folder into a single pdf. I pass an array of file paths as strings and the output file i would like.

This is the function i use.

the code that was marked correct does not close all the file streams therefore the files stay open within the app and you wont be able to delete unused PDFs within your project

This is a better solution:

I realize I'm pretty late to the party, but after reading the comments from @BrunoLowagie, I wanted to see if I could put something together myself that uses the examples from his linked sample chapter. It's probably overkill, but I put together some code that merges multiple PDFs into a single file that I posted on the Code Review SE site (the post, VB.NET - Error Handling in Generic Class for PDF Merge, contains the full class code). It only merges PDF files right now, but I'm planning on adding methods for additional functionality later.

The 'master' method (towards the end of the Class block in the linked post, and also posted below for reference) handles the actual merging of the PDF files, but the multiple overloads provide a number of options for how to define the list of original files. So far, I've included the following features:

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• The methods return a System.IO.FileInfo object if the merge is successful.
• Provide a System.IO.DirectoryInfo object or a System.String identifying a path and it will collect all PDF files in that directory (including sub-directories if specified) to merge.
• Provide a List(Of System.String) or a List(Of System.IO.FileInfo) specifying the PDFs you want to merge.
• Identify how the PDFs should be sorted before the merge (especially useful if you use one of the MergeAll methods to get all PDF files in a directory).
• If the specified output PDF file already exists, you can specify whether or not you want to overwrite it. (I'm considering adding the 'ability' to automatically adjust the output PDF file's name if it already exists).
• Warning and Error properties provide a way to get feedback in the calling method, whether or not the merge is successful.

Once the code is in place, it can be used like this:

Here is the 'master' method. As I said, it's probably overkill (and I'm still tweaking it some), but I wanted to do my best to try to make it work as effectively as possible. Obviously it requires a Reference to the itextsharp.dll for access to the library's functions.

I've commented out the references to the Error and Warning properties of the class for this post to help reduce any confusion.

Some may have to make a change to the code at 'writer = PdfWriter.GetInstance(pdfDoc, New FileStream(outputPath, FileMode.OpenOrCreate))' as iTextSharp may not support

Change to:

How Merge Pdfs For Free

Turn On The Human Calculator In You

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