PDF to PDF .NET Examples

This page contains various examples of using the PDF to PDF API in .NET. The examples are complete and fully functional. Read more about how to convert PDF to PDF in .NET.

Basic examples
PDF manipulation examples
ASP.NET Web Forms examples

Basic examples

Multiple PDFs to PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.addPdfFile("/path/to/cover.pdf");
            client.addPdfFile("/path/to/proposal.pdf");
            client.addPdfFile("/path/to/price.pdf");
            client.addPdfFile("/path/to/contact.pdf");

            // run the conversion and write the result to a file
            client.convertToFile("offer.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

Multiple PDFs to in-memory PDF

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.addPdfFile("/path/to/cover.pdf");
            client.addPdfFile("/path/to/proposal.pdf");
            client.addPdfFile("/path/to/price.pdf");
            client.addPdfFile("/path/to/contact.pdf");

            // run the conversion and store the result into the "pdf" variable
            byte[] pdf = client.convert();

            // at this point the "pdf" variable contains PDF raw data and
            // can be sent in an HTTP response, saved to a file, etc.
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

Multiple PDFs to PDF stream

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.addPdfFile("/path/to/cover.pdf");
            client.addPdfFile("/path/to/proposal.pdf");
            client.addPdfFile("/path/to/price.pdf");
            client.addPdfFile("/path/to/contact.pdf");

            // create an output stream for the conversion result
            FileStream outputStream = new FileStream("offer.pdf", FileMode.CreateNew);

            // run the conversion and write the result into the output stream
            client.convertToStream(outputStream);

            // close the output stream
            outputStream.Close();
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

Multiple in-memory PDFs to PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.addPdfRawData(File.ReadAllBytes("/path/to/cover.pdf"));
            client.addPdfRawData(File.ReadAllBytes("/path/to/proposal.pdf"));
            client.addPdfRawData(File.ReadAllBytes("/path/to/price.pdf"));
            client.addPdfRawData(File.ReadAllBytes("/path/to/contact.pdf"));

            // run the conversion and write the result to a file
            client.convertToFile("offer.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

Join 2 in-memory PDFs together with 2 local PDF files to PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.addPdfRawData(File.ReadAllBytes("/path/to/cover.pdf"));
            client.addPdfFile("/path/to/proposal.pdf");
            client.addPdfRawData(File.ReadAllBytes("/path/to/price.pdf"));
            client.addPdfFile("/path/to/contact.pdf");

            // run the conversion and write the result to a file
            client.convertToFile("offer.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

Watermark a PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.addPdfFile("/path/to/proposal.pdf");
            client.setPageWatermark("/path/to/watermark.pdf");

            // run the conversion and write the result to a file
            client.convertToFile("company_offer.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

Linearize a PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.addPdfFile("/path/to/not_linearized.pdf");
            client.setLinearize(true);

            // run the conversion and write the result to a file
            client.convertToFile("linearized.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

Get info about the current conversion

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.setDebugLog(true);
            client.addPdfRawData(File.ReadAllBytes("/path/to/cover.pdf"));
            client.addPdfRawData(File.ReadAllBytes("/path/to/proposal.pdf"));

            // run the conversion and write the result to a file
            client.convertToFile("offer.pdf");
            
            // print URL of the debug log
            System.Console.WriteLine("Debug log url: " + client.getDebugLogUrl());
            
            // print the number of conversion credits remaining in your account
            System.Console.WriteLine("Remaining credit count: " + client.getRemainingCreditCount());
            
            // print the number of credits used for the conversion
            System.Console.WriteLine("Consumed credit count: " + client.getConsumedCreditCount());
            
            // print the unique identifier for the conversion
            System.Console.WriteLine("Job id: " + client.getJobId());
            
            // print total number of pages in the output document
            System.Console.WriteLine("Page count: " + client.getPageCount());
            
            // print size of the output data in bytes
            System.Console.WriteLine("Output size: " + client.getOutputSize());
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

PDF manipulation examples

Extract page 3 and all pages from 7 to the end from the PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.addPdfFile("/your-path-to/pdfs/13_pages.pdf");
            client.setAction("extract");
            client.setPageRange("3,7-");

            // run the conversion and write the result to a file
            client.convertToFile("output.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

Delete the first 3 pages and the 10th page from the PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

            // configure the conversion
            client.addPdfFile("/your-path-to/pdfs/13_pages.pdf");
            client.setAction("delete");
            client.setPageRange("1-3,10");

            // run the conversion and write the result to a file
            client.convertToFile("output.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

Split the PDF file into two separate files at the 10th page

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");
            client.addPdfFile("/your-path-to/pdfs/13_pages.pdf");
            client.setAction("extract");
            client.setPageRange("1-10");
            client.convertToFile("pages1-10.pdf");
            client.setPageRange("11-");
            client.convertToFile("pages11-end.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);
            throw;
        }
    }
}

ASP.NET Web Forms examples

Multiple PDFs to PDF in ASP.NET Web Forms

using System;
using System.IO;
using System.Web;
using System.Web.UI;
using System.Web.Mvc;

namespace PdfcrowdDemo
{
    public partial class Default: System.Web.UI.Page
    {
        protected override void Render(HtmlTextWriter writer)
        {
            try
            {
                // create the API client instance
                pdfcrowd.PdfToPdfClient client =
                    new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

                // configure the conversion
                client.addPdfFile("/path/to/cover.pdf");
                client.addPdfFile("/path/to/proposal.pdf");
                client.addPdfFile("/path/to/price.pdf");
                client.addPdfFile("/path/to/contact.pdf");

                // run the conversion and store the result into the "pdf" variable
                byte[] pdf = client.convert();

                // set HTTP response headers
                Response.ContentType = "application/pdf";
                Response.Headers.Add("Cache-Control", "max-age=0");
                Response.Headers.Add("Accept-Ranges", "none");
                Response.Headers.Add("Content-Disposition", "attachment; filename*=UTF-8''" + Uri.EscapeUriString("offer.pdf"));

                // send the result in the HTTP response
                Response.OutputStream.Write(pdf, 0, pdf.Length);
                Response.Flush();
            }
            catch(pdfcrowd.Error why)
            {
                // send the error in the HTTP response
                Response.StatusCode = why.getCode();
                Response.StatusDescription = why.getMessage();
            }
        }
    }
}

Multiple in-memory PDFs to PDF in ASP.NET Web Forms

using System;
using System.IO;
using System.Web;
using System.Web.UI;
using System.Web.Mvc;

namespace PdfcrowdDemo
{
    public partial class Default: System.Web.UI.Page
    {
        protected override void Render(HtmlTextWriter writer)
        {
            try
            {
                // create the API client instance
                pdfcrowd.PdfToPdfClient client =
                    new pdfcrowd.PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d");

                // configure the conversion
                client.addPdfRawData(File.ReadAllBytes("/path/to/cover.pdf"));
                client.addPdfRawData(File.ReadAllBytes("/path/to/proposal.pdf"));
                client.addPdfRawData(File.ReadAllBytes("/path/to/price.pdf"));
                client.addPdfRawData(File.ReadAllBytes("/path/to/contact.pdf"));

                // run the conversion and store the result into the "pdf" variable
                byte[] pdf = client.convert();

                // set HTTP response headers
                Response.ContentType = "application/pdf";
                Response.Headers.Add("Cache-Control", "max-age=0");
                Response.Headers.Add("Accept-Ranges", "none");
                Response.Headers.Add("Content-Disposition", "attachment; filename*=UTF-8''" + Uri.EscapeUriString("offer.pdf"));

                // send the result in the HTTP response
                Response.OutputStream.Write(pdf, 0, pdf.Length);
                Response.Flush();
            }
            catch(pdfcrowd.Error why)
            {
                // send the error in the HTTP response
                Response.StatusCode = why.getCode();
                Response.StatusDescription = why.getMessage();
            }
        }
    }
}