Image to Image / .NET Examples

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

Basic examples
ASP.NET Web Forms examples

Basic examples

PNG file to JPEG file

using System;
using System.IO;

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

            // Configure the conversion.
            client.setOutputFormat("jpg");

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

PNG file to in-memory JPEG

using System;
using System.IO;

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

            // Configure the conversion.
            client.setOutputFormat("jpg");

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

            // at this point the "image" variable contains JPG 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 JPEG stream

using System;
using System.IO;

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

            // Configure the conversion.
            client.setOutputFormat("jpg");

            // Create an output stream for the conversion result
            FileStream outputStream = new FileStream("logo.jpg", 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 JPEG file

using System;
using System.IO;

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

            // Configure the conversion.
            client.setOutputFormat("jpg");

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

PNG url to in-memory JPEG

using System;
using System.IO;

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

            // Configure the conversion.
            client.setOutputFormat("jpg");

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

            // at this point the "image" variable contains JPG 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 JPEG stream

using System;
using System.IO;

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

            // Configure the conversion.
            client.setOutputFormat("jpg");

            // Create an output stream for the conversion result
            FileStream outputStream = new FileStream("logo.jpg", 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 JPEG file

using System;
using System.IO;

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

            // Configure the conversion.
            client.setOutputFormat("jpg");

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

In-memory PNG to in-memory JPEG

using System;
using System.IO;

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

            // Configure the conversion.
            client.setOutputFormat("jpg");

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

            // at this point the "image" variable contains JPG 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 JPEG stream

using System;
using System.IO;

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

            // Configure the conversion.
            client.setOutputFormat("jpg");

            // Create an output stream for the conversion result
            FileStream outputStream = new FileStream("logo.jpg", 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.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("demo", "demo");

            // Configure the conversion.
            client.setOutputFormat("jpg");
            client.setDebugLog(true);

            // Run the conversion and save the result to a file.
            client.convertFileToFile("/path/to/logo.png", "logo.jpg");
            
            // 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 JPEG 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.ImageToImageClient client =
                    new pdfcrowd.ImageToImageClient("demo", "demo");

                // Configure the conversion.
                client.setOutputFormat("jpg");

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

                // Set HTTP response headers.
                Response.ContentType = "image/jpeg";
                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.jpg"));

                // Send the result in the HTTP response.
                Response.OutputStream.Write(image, 0, image.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 JPEG 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.ImageToImageClient client =
                    new pdfcrowd.ImageToImageClient("demo", "demo");

                // Configure the conversion.
                client.setOutputFormat("jpg");

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

                // Set HTTP response headers.
                Response.ContentType = "image/jpeg";
                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.jpg"));

                // Send the result in the HTTP response.
                Response.OutputStream.Write(image, 0, image.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 JPEG 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.ImageToImageClient client =
                    new pdfcrowd.ImageToImageClient("demo", "demo");

                // Configure the conversion.
                client.setOutputFormat("jpg");

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

                // Set HTTP response headers.
                Response.ContentType = "image/jpeg";
                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.jpg"));

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