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How to manage memory while merging large PDF documents?

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Setting the EnableMemoryOptimization property of the PdfLoadedDocument to true reduces the memory usage when its instance is closed in WinForms PDF.  To achieve this, create a PdfDocument, then import the pages and contents of the loaded documents to the PdfDocument, and dispose the loaded document. Finally, save the PdfDocument’s instance and close the same.


//Gets the file directory
String[] inputDocuments = Directory.GetFiles("../../Data/");
//Creates a new instance.
PdfDocument document = new PdfDocument();
//Optimizes memory while merging PDF documents.
document.EnableMemoryOptimization = true; 
//Iterates input PDF documents.
 foreach (string inputDocument in inputDocuments)
//Loads PDF document in order to merge.
PdfLoadedDocument loadedDocument = new PdfLoadedDocument(inputDocument);
loadedDocument.EnableMemoryOptimization = true;
//Merges loaded document contents to the parent PDF document. 
document.ImportPageRange(loadedDocument, 0, loadedDocument.Pages.Count - 1); 
//Closes the document.
//Saves and closes the document.

Sample Link:


I hope you enjoyed learning about how to manage memory while merging large PDF documents.

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