Create PNG image with C# HttpHandler webservice

Question

I\'d like to be able to create a simple PNG image, say of a red square using a c# web based service to generate the image, called from an

Answer 1

There is another way to accomplish serving a dynamic image.

namespace MyApp
{
    [ServiceContract]
    public interface IMyService
    {
        [WebGet(UriTemplate = "Image.png")]
        [OperationContract]
        Stream ShowImage();
    }
}

For the implementation:

public Stream ShowImage()
{
    Bitmap image = new Bitmap(@"C:\Image.png");
    Image image2 = new Bitmap(125, 125);

    using (Graphics graphics = Graphics.FromImage(image2))
    {
           graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
           graphics.SmoothingMode = SmoothingMode.HighQuality;
           graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
           graphics.CompositingQuality = CompositingQuality.HighQuality;
           graphics.DrawImage(image, 0, 0, 125, 125);
    }

    MemoryStream imageAsMemoryStream = new MemoryStream();
    image2.Save(imageAsMemoryStream, ImageFormat.Png);
    imageAsMemoryStream.Position = 0;
    return imageAsMemoryStream;
}

Start the service as a regular WCF service and add the service in your app.config

(WebService = new WebServiceHost(typeof(MyService))).Open();

You can pass parameters to make it more dynamic.