Some test text!

menu

Read & write a PDF file from/to memory buffer in C#

More languages

chevron_right
More languages
Java (Android)
C++
C#
C# (.NET Core)
Java
Kotlin
Obj-C
JS (Node.js)
PHP
Python
Ruby
Swift
C# (UWP)
VB
C# (Xamarin)

Sample C# code for using PDFTron SDK to read/write a PDF document from/to memory buffer. This is useful for applications that work with dynamic PDFdocuments that don't need to be saved/read from a disk. Learn more about our C# PDF Library.

Get StartedSamplesDownload

To run this sample, get started with a free trial of PDFTron SDK.

//
// Copyright (c) 2001-2020 by PDFTron Systems Inc. All Rights Reserved.
//

using System;
using System.IO;
using pdftron;
using pdftron.Common;
using pdftron.Filters;
using pdftron.SDF;
using pdftron.PDF;

// The following sample illustrates how to read/write a PDF document from/to 
// a memory buffer.  This is useful for applications that work with dynamic PDF
// documents that don't need to be saved/read from a disk.
using NUnit.Framework;

namespace MiscellaneousSamples
{
	[TestFixture]
	public class PDFDocMemoryTest
	{
		
		[Test]
		public static void Sample()
		{

			// Relative path to the folder containing test files.
			const string input_path =  "TestFiles/";

			try  
			{
				// Read a PDF document from a stream or pass-in a memory buffer...
				FileStream istm = new FileStream(Utils.GetAssetTempFile(input_path + "tiger.pdf"), FileMode.Open, FileAccess.Read);
				using (PDFDoc doc = new PDFDoc(istm))
				using (ElementWriter writer = new ElementWriter())
				using (ElementReader reader = new ElementReader())
				{
					doc.InitSecurityHandler();

					int num_pages = doc.GetPageCount();

					Element element;

					// Perform some document editing ...
					// Here we simply copy all elements from one page to another.
					for(int i = 1; i <= num_pages; ++i)
					{
						Page pg = doc.GetPage(2 * i - 1);

						reader.Begin(pg);
						Page new_page = doc.PageCreate(pg.GetMediaBox());
						doc.PageInsert(doc.GetPageIterator(2*i), new_page);

						writer.Begin(new_page);
						while ((element = reader.Next()) != null) 	// Read page contents
						{
							writer.WriteElement(element);
						}

						writer.End();
						reader.End();
					}

					doc.Save(Utils.CreateExternalFile("doc_memory_edit.pdf"), SDFDoc.SaveOptions.e_remove_unused);

					// Save the document to a stream or a memory buffer...
					using (FileStream ostm = new FileStream(Utils.CreateExternalFile("doc_memory_edit.txt"), FileMode.Create, FileAccess.Write)) {
						doc.Save(ostm, SDFDoc.SaveOptions.e_remove_unused);
					}

					// Read some data from the file stored in memory
					reader.Begin(doc.GetPage(1));
					while ((element = reader.Next()) != null) {
						if (element.GetType() == Element.Type.e_path)
							Console.Write("Path, ");
					}
					reader.End();

                    Console.WriteLine("");
                    Console.WriteLine("");
                    Console.WriteLine("Done. Result saved in doc_memory_edit.pdf and doc_memory_edit.txt ...");
				}
			}
			catch (PDFNetException e)
			{
				Console.WriteLine(e.Message);
				Assert.True(false);
			}
		}
	}
}
close

Free Trial

Get unlimited trial usage of PDFTron SDK to bring accurate, reliable, and fast document processing capabilities to any application or workflow.

Select a platform to get started with your free trial.

Unlimited usage. No email address required.

Join our upcoming webinar to learn about how to collaborate on videos frame by frame directly in your browser

Save your seat
close