Return thumbnail image from ASP.NET MVC action method

To return thumbnail image from ASP.NET MVC action method, Follow below approach.

Controller code

public FileResult GetThumbnail(string fileName)
        {
            var path = Server.MapPath(fileName);
            var stream = new MemoryStream();
            var exteName = Path.GetExtension(path);

            using (Image image = Image.FromFile(path))
            {
                using (Image thumb = image.GetThumbnailImage(120, 120, () => false, IntPtr.Zero))
                {
                    thumb.Save(stream, ImageFormat.Png);
                }
            }
            return File(stream.ToArray(), "image/" + exteName.Substring(1));
        }

Above code will generate a thumbnail image of 120*120 based the file name passed.
View code

<img class="img-thumbnail" src="/Home/GetThumbnail/?fileName=/images/asb.jpg" alt="" />

When the <img> tag renders it calls /Home/GetThumbnail action method that generates the thumbnail from the fileName value and return an stream of array that shows the image of 120*120.