Documentation

Image to PDF .NET Examples

These examples demonstrate common Image to PDF API workflows in .NET.

Basic examples

PNG file to PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // Create an API client instance.
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

            // Run the conversion and save the result to a file.
            client.convertFileToFile("/path/to/logo.png", "logo.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("PDFCrowd Error: " + why);
            throw;
        }
    }
}

PNG file to in-memory PDF

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // Create an API client instance.
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

            // Run the conversion and store the result in 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)
        {
            System.Console.Error.WriteLine("PDFCrowd Error: " + why);
            throw;
        }
    }
}

PNG file to PDF stream

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // Create an API client instance.
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

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

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

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

PNG url to PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // Create an API client instance.
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

            // Run the conversion and save the result to a file.
            client.convertUrlToFile("https://pdfcrowd.com/static/images/logo.png", "logo.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("PDFCrowd Error: " + why);
            throw;
        }
    }
}

PNG url to in-memory PDF

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // Create an API client instance.
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

            // Run the conversion and store the result in 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)
        {
            System.Console.Error.WriteLine("PDFCrowd Error: " + why);
            throw;
        }
    }
}

PNG url to PDF stream

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // Create an API client instance.
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

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

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

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

In-memory PNG to PDF file

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // Create an API client instance.
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

            // Run the conversion and save the result to a file.
            client.convertRawDataToFile(File.ReadAllBytes("/path/to/logo.png"), "logo.pdf");
        }
        catch(pdfcrowd.Error why)
        {
            System.Console.Error.WriteLine("PDFCrowd Error: " + why);
            throw;
        }
    }
}

In-memory PNG to in-memory PDF

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // Create an API client instance.
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

            // Run the conversion and store the result in 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)
        {
            System.Console.Error.WriteLine("PDFCrowd Error: " + why);
            throw;
        }
    }
}

In-memory PNG to PDF stream

using System;
using System.IO;

public class ApiTest
{
    public static void Main()
    {
        try
        {
            // Create an API client instance.
            pdfcrowd.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

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

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

            // Close the output stream.
            outputStream.Close();
        }
        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.ImageToPdfClient client =
                new pdfcrowd.ImageToPdfClient("demo", "demo");

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

            // Run the conversion and save the result to a file.
            client.convertFileToFile("/path/to/logo.png", "logo.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 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;
        }
    }
}

ASP.NET Web Forms examples

PNG file 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.ImageToPdfClient client =
                    new pdfcrowd.ImageToPdfClient("demo", "demo");

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

                // 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("logo.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();
            }
        }
    }
}

PNG url 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.ImageToPdfClient client =
                    new pdfcrowd.ImageToPdfClient("demo", "demo");

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

                // 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("logo.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();
            }
        }
    }
}

In-memory PNG 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.ImageToPdfClient client =
                    new pdfcrowd.ImageToPdfClient("demo", "demo");

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

                // 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("logo.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();
            }
        }
    }
}