#Mergepdf hime pdf
#Mergepdf hime code
#Mergepdf hime free

This is not trivial and you'll end up re-writing lots of code that already exists. Once that's done, you need to re-build the document trailer which tells an application where the various sections of the document are among other things. You'll also need to ensure you create objects in the xref table for the page break. You'd have to calculate the byte offset of the second page, shift all of the elements in it's xref table by that much, and then add it's xref table to the first. The xref table is a cross reference table that describes the content of the document and more importantly where to find each element. Now the hard part, and likely the part that will convince you to use a library, is that you have to re-build the xref table.

Then you can write the body of the first page, and then the second. This is pretty easy since it's just the first line. In order to merge 2 PDFs you'll need to manipulate the streams.įirst you'll need to conserve the header from only one of the files.

#Mergepdf hime pdf

Behind the scenes there is a strict file format that describes things like PDF version, the objects contained in the file and where to find them. To test it var srcPath = destFile = destFile) ĭisclaimer: A part of this answer is taken from my my personal web site with source code to github. Using (var src = new (new (file)))ĭest.Save(destFile, SerializationModeEnum.Incremental) Var files = list.Select(File.ReadAllBytes).ToList() If (string.IsNullOrWhiteSpace(srcPath) || string.IsNullOrWhiteSpace(destFile) || list.Length <= 1) Var list = Directory.GetFiles(Path.GetFullPath(srcPath)) The code is self explaining, the key point here is using SerializationModeEnum.Incremental: public static void MergePdf(string srcPath, string destFile) It is also possible to use MemoryStream, but I do not find it necessary in this case. I supply my example that take a folder with multiple pdf files, merged it and save it to same or another folder. One such you can merge 2 or more documents to one document.

#Mergepdf hime free

It is Free with out limitation (donate if you like). I have made research and found you an Open Source library called PdfClown with nuget package, it is also available for Java. I assume your requirement for not using library is that most Free libraries, nuget packages has limitation or/and cost money for commercial use. Merging pdf in C# or any other language is not straight forward with out using 3rd party library. Var writer = new StreamWriter(htmlStream) In case it is required, below is the elaboration of the GetPdfStream() method. Merge the same PDF (either Landscape or Portrait one) with itself.But when I try to open the PDF, I see the content of just 1 of the two PDFs.Īdditionally, when I try to close the 'abc_combined.pdf', I am prompted to save it, which does not happen with the other 2 PDFs.īelow are a few things that I have tried out already, to no avail: I am using MemoryStream to preform the merge, and at the time of debug, I can see that the finalStream.length is equal to the sum of the previous two PDFs. The PDFs 'abc_landscape.pdf' and 'abc_portrait.pdf' generate correctly, as expected, but the operation fails when I try to combine the two in a third pdf (abc_combined.pdf). System.IO.FileStream file_combined = new System.IO.FileStream('abc_combined.pdf', System.IO.FileMode.Create) System.IO.MemoryStream finalStream = new System.IO.MemoryStream() System.IO.FileStream file_portrait = new System.IO.FileStream('abc_portrait.pdf', System.IO.FileMode.Create) System.IO.MemoryStream PDF_portrait = new WkHtmlToPdfConverter().GetPdfStream(properties) Properties.IsHorizontalOrientation = false System.IO.FileStream file = new System.IO.FileStream('abc_landscape.pdf', System.IO.FileMode.Create) System.IO.MemoryStream PDF = new WkHtmlToPdfConverter().GetPdfStream(properties) The properties object contains the html as a string, and the argument for landscape/portrait. I have a c# class that takes an HTML and converts it to PDF using wkhtmltopdf.Īs you will see below, I am generating 3 PDFs - Landscape, Portrait, and combined of the two.