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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

            // 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 save 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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

            // 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 in 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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

            // 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 to 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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

            // 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 save 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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

            // 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 save 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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

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

            // Run the conversion and save 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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

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

            // Run the conversion and save 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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

            // 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 save the result to a file.
            client.convertToFile("offer.pdf");
            
            // print URL pointing to the debug log for this request.
            System.Console.WriteLine("Debug log url: " + client.getDebugLogUrl());
            
            // print number of conversion credits remaining in your account.
            System.Console.WriteLine("Remaining credit count: " + client.getRemainingCreditCount());
            
            // print number of credits consumed for this conversion.
            System.Console.WriteLine("Consumed credit count: " + client.getConsumedCreditCount());
            
            // print unique identifier assigned to this conversion job.
            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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

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

            // Run the conversion and save 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 an API client instance.
            pdfcrowd.PdfToPdfClient client =
                new pdfcrowd.PdfToPdfClient("demo", "demo");

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

            // Run the conversion and save 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", "demo");
            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 an API client instance.
                pdfcrowd.PdfToPdfClient client =
                    new pdfcrowd.PdfToPdfClient("demo", "demo");

                // 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 in 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.getStatusCode();
                Response.StatusDescription = why.ToString();
            }
        }
    }
}

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 an API client instance.
                pdfcrowd.PdfToPdfClient client =
                    new pdfcrowd.PdfToPdfClient("demo", "demo");

                // 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 in 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.getStatusCode();
                Response.StatusDescription = why.ToString();
            }
        }
    }
}