PDF to Image / .NET Examples

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

Basic examples
ASP.NET Web Forms examples

Basic examples

PDF file to PNG file

using System;
using System.IO;

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

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setForceZip(true);

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

PDF file to in-memory PNG

using System;
using System.IO;

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

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setForceZip(true);

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

            // at this point the "png" variable contains PNG 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;
        }
    }
}

PDF file to PNG stream

using System;
using System.IO;

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

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setForceZip(true);

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

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

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

PDF url to PNG file

using System;
using System.IO;

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

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setForceZip(true);

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

PDF url to in-memory PNG

using System;
using System.IO;

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

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setForceZip(true);

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

            // at this point the "png" variable contains PNG 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;
        }
    }
}

PDF url to PNG stream

using System;
using System.IO;

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

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setForceZip(true);

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

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

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

In-memory PDF to PNG file

using System;
using System.IO;

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

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setForceZip(true);

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

In-memory PDF to in-memory PNG

using System;
using System.IO;

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

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setForceZip(true);

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

            // at this point the "png" variable contains PNG 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 PDF to PNG stream

using System;
using System.IO;

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

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setForceZip(true);

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

            // run the conversion and write the result to the output stream.
            client.convertRawDataToStream(File.ReadAllBytes("/path/to/hello_world.pdf"), 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.PdfToImageClient client =
                new pdfcrowd.PdfToImageClient("demo", "demo");

            // If unsure whether the input is a single-page file, enforce ZIP output.
            client.setOutputFormat("png");
            client.setDebugLog(true);
            client.setForceZip(true);

            // Run the conversion and save the result to a file.
            client.convertFileToFile("/path/to/invoice.pdf", "invoice.zip");
            
            // 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;
        }
    }
}

ASP.NET Web Forms examples

PDF file to PNG 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.PdfToImageClient client =
                    new pdfcrowd.PdfToImageClient("demo", "demo");

                // If unsure whether the input is a single-page file, enforce ZIP output.
                client.setOutputFormat("png");
                client.setForceZip(true);

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

                // Set HTTP response headers.
                Response.ContentType = "image/png";
                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("invoice.zip"));

                // Send the result in the HTTP response.
                Response.OutputStream.Write(png, 0, png.Length);
                Response.Flush();
            }
            catch(pdfcrowd.Error why)
            {
                // Send the error in the HTTP response.
                Response.StatusCode = why.getStatusCode();
                Response.StatusDescription = why.ToString();
            }
        }
    }
}

PDF url to PNG 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.PdfToImageClient client =
                    new pdfcrowd.PdfToImageClient("demo", "demo");

                // If unsure whether the input is a single-page file, enforce ZIP output.
                client.setOutputFormat("png");
                client.setForceZip(true);

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

                // Set HTTP response headers.
                Response.ContentType = "image/png";
                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("invoice.zip"));

                // Send the result in the HTTP response.
                Response.OutputStream.Write(png, 0, png.Length);
                Response.Flush();
            }
            catch(pdfcrowd.Error why)
            {
                // Send the error in the HTTP response.
                Response.StatusCode = why.getStatusCode();
                Response.StatusDescription = why.ToString();
            }
        }
    }
}

In-memory PDF to PNG 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.PdfToImageClient client =
                    new pdfcrowd.PdfToImageClient("demo", "demo");

                // If unsure whether the input is a single-page file, enforce ZIP output.
                client.setOutputFormat("png");
                client.setForceZip(true);

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

                // Set HTTP response headers.
                Response.ContentType = "image/png";
                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("invoice.zip"));

                // Send the result in the HTTP response.
                Response.OutputStream.Write(png, 0, png.Length);
                Response.Flush();
            }
            catch(pdfcrowd.Error why)
            {
                // Send the error in the HTTP response.
                Response.StatusCode = why.getStatusCode();
                Response.StatusDescription = why.ToString();
            }
        }
    }
}