How to manage memory while merging large PDF documents?
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.
C#
//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.
loadedDocument.Close(true);
}
//Saves and closes the document.
document.Save("Output.pdf");
document.Close(true);
Sample Link:
Conclusion
I hope you enjoyed learning about how to manage memory while merging large PDF documents.
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