Image to PDF in .NET

This page describes how to convert images to PDF in .NET using the Pdfcrowd API. The API is easy to use and the integration takes only a few of lines of code.

Samples

JPG
JPG Image ⇒

PDF
PDF

Installation

Download pdfcrowd-5.6.2-dotnet.zip, unzip it and add a reference to pdfcrowd.dll to your project.

We also offer other installation options (NuGet, GitHub).

Authentication

Authentication is needed in order to use the Pdfcrowd API. The credentials used for accessing the API are your Pdfcrowd username and the API key.

To get your personal API credentials, you can start a free API trial or buy the API license.

Examples

Convert a local PNG file to a PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

            // run the conversion and write the result to a file
            client.convertFileToFile("/path/to/logo.png", "logo.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}

Convert a local PNG file to in-memory PDF

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

            // run the conversion and store the result into the "pdf" variable
            byte[] pdf = client.convertFile("/path/to/logo.png");

            // 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)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}

Convert a local PNG file and write the resulting PDF to an output stream

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

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

            // run the conversion and write the result into the output stream
            client.convertFileToStream("/path/to/logo.png", outputStream);

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

            // rethrow or handle the exception
            throw;
        }
    }
}

Convert url with PNG file to a PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

            // run the conversion and write the result to a file
            client.convertUrlToFile("https://pdfcrowd.com/static/images/logo.png", "logo.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}

Convert url with PNG file to in-memory PDF

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

            // run the conversion and store the result into the "pdf" variable
            byte[] pdf = client.convertUrl("https://pdfcrowd.com/static/images/logo.png");

            // 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)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}

Convert url with PNG file and write the resulting PDF to an output stream

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

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

            // run the conversion and write the result into the output stream
            client.convertUrlToStream("https://pdfcrowd.com/static/images/logo.png", outputStream);

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

            // rethrow or handle the exception
            throw;
        }
    }
}

Convert an in-memory PNG to a PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

            // run the conversion and write the result to a file
            client.convertRawDataToFile(File.ReadAllBytes("/path/to/logo.png"), "logo.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}

Convert an in-memory PNG to in-memory PDF

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

            // run the conversion and store the result into the "pdf" variable
            byte[] pdf = client.convertRawData(File.ReadAllBytes("/path/to/logo.png"));

            // 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)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}

Convert an in-memory PNG and write the resulting PDF to an output stream

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // create the API client instance
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

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

            // run the conversion and write the result into the output stream
            client.convertRawDataToStream(File.ReadAllBytes("/path/to/logo.png"), outputStream);

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

            // rethrow or handle the exception
            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.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("your_username", "your_apikey");

            // configure the conversion
            client.setDebugLog(true);

            // run the conversion and write the result to a file
            client.convertFileToFile("/path/to/logo.png", "logo.pdf");
            
            // print URL to the debug log
            System.Console.WriteLine("Debug log url: " + client.getDebugLogUrl());
            
            // print the number of available conversion credits in your account
            System.Console.WriteLine("Remaining credit count: " + client.getRemainingCreditCount());
            
            // print the number of credits consumed by the conversion
            System.Console.WriteLine("Consumed credit count: " + client.getConsumedCreditCount());
            
            // print the unique ID of the conversion
            System.Console.WriteLine("Job id: " + client.getJobId());
            
            // print the size of the output in bytes
            System.Console.WriteLine("Output size: " + client.getOutputSize());
        }
        catch(pdfcrowd.Error why)
        {
            // report the error
            System.Console.Error.WriteLine("Pdfcrowd Error: " + why);

            // rethrow or handle the exception
            throw;
        }
    }
}

Troubleshooting

List of API Status Codes if an error code is returned.
You can use setDebugLog and getDebugLogUrl to get detailed info about the conversion, such as conversion errors, time, console output.
Take a look at the FAQ section.
Are you missing a feature? Contact us, we look forward to your suggestions.

API Method Reference

Refer for details to the API Method Reference.