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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

            // run the conversion and write 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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

            // run the conversion and store the result into 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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

            // 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 into 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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

            // run the conversion and write 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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

            // run the conversion and store the result into 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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

            // 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 into 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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

            // run the conversion and write 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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

            // run the conversion and store the result into 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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

            // 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 into 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 the API client instance
            pdfcrowd.ImageToImageClient client =
                new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

            // run the conversion and write the result to a file
            client.convertFileToFile("/path/to/logo.png", "logo.jpg");
            
            // 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)
        {
            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 the API client instance
                pdfcrowd.ImageToImageClient client =
                    new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

                // run the conversion and store the result into 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.getCode();
                Response.StatusDescription = why.getMessage();
            }
        }
    }
}

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 the API client instance
                pdfcrowd.ImageToImageClient client =
                    new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

                // run the conversion and store the result into 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.getCode();
                Response.StatusDescription = why.getMessage();
            }
        }
    }
}

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 the API client instance
                pdfcrowd.ImageToImageClient client =
                    new pdfcrowd.ImageToImageClient("your_username", "your_apikey");

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

                // run the conversion and store the result into 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.getCode();
                Response.StatusDescription = why.getMessage();
            }
        }
    }
}