Thumbnails with Asp.net Mvc

Question

Does anyone know of a way to display a thumbnail image from a byte array, or even better, a library that does this. Thanks

I added a new column to my table that is another blob but this one is for thumbnails and i use the technique i posted below to shrink the image — Collin O'Connor
– Collin O'Connor, Commented Feb 17, 2011 at 20:54
You're looking for the ImageResizing.Net library. It's free, and from what I know, the most popular. — Lilith River
– Lilith River, Commented Oct 15, 2011 at 22:41

Alexander Prokofyev · Accepted Answer · 2011-02-17 12:34:10Z

9

With ASP.NET MVC 3 and WebMatrix we now have nice standard WebImage class which has among others GetImageFromRequest, Resize, Crop and AddTextWatermark methods.

answered Feb 17, 2011 at 12:34

Alexander Prokofyev

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Collin O'Connor · Accepted Answer · 2011-03-14 09:47:43Z

4

public ActionResult Thumbnail() {
            byte[] myByte = System.IO.File.ReadAllBytes(location);
            Image i;
            using (MemoryStream ms = new MemoryStream()) {
                ms.Write(myByte , 0 , myByte.Length);
                i = Image.FromStream(ms);
            }
            return File(imageToByteArray(i.GetThumbnailImage(100 , 100 , () => false , IntPtr.Zero)) , "image/jpeg");
        }

        public byte[] imageToByteArray ( System.Drawing.Image imageIn ) {
            MemoryStream ms = new MemoryStream();
            imageIn.Save(ms , System.Drawing.Imaging.ImageFormat.Gif);
            return ms.ToArray();
        }

This is what i used. Instead of doing this each time i want a thumbnail, i created a new column in my table that was a varbinary and called that column each time i wanted a thumbnail.

edited Mar 14, 2011 at 9:47

answered Feb 16, 2011 at 20:38

Collin O'Connor

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1 Comment

Lilith River Over a year ago

GetThumbnailImage() produces very horrible results (although the GIF encoding will make it meaningless anyway). Also note that you're leaking a Image object (GDI handle), and No, the GC will not clean that up after you properly. See this article

Vesper · Accepted Answer · 2015-07-21 04:58:48Z

I used this library to create thumbnail

https://github.com/terjetyl/Simple.ImageResizer

Example :

    [HttpPost]
    public ActionResult UploadFilePage(HttpPostedFileBase file, BannerCliente banner)
    {
        try
        {
            string filename = Path.GetFileName(file.FileName);

            string crearRutaThumb = Path.Combine(Server.MapPath("~/Carpeta/" + banner.ClienteId), "thumbnail");
            Directory.CreateDirectory(crearRutaThumb);

            string rutaImagenOriginal = Path.Combine(Server.MapPath("~/Carpeta/" + banner.ClienteId), filename);

            var frerf = new ImageResizer(byteFile(rutaImagenOriginal));
            frerf.Resize(100, ImageEncoding.Jpg100);
            frerf.SaveToFile(Path.Combine(Server.MapPath("~/Carpeta/" + banner.ClienteId + "/thumbnail"), file.FileName));
        }
        catch (Exception ex)
        {

            throw ex;
        }

        return View();
    }

    public byte[] byteFile(string fileName)
    {
        return System.IO.File.ReadAllBytes(fileName);
    }

Community · Accepted Answer · 2020-06-20 09:12:55Z

0

The open-source ImageResizing.Net library is what you're looking for

It supports SQL, S3, and filesystem images, and allows resizing, cropping, rotation and many other manipulations.

It also offers an IVirtualImageProvider interface if you want to generate 'virtual images' instead of simply modifying existing ones.

NOTE: The SQL and S3 plugins are open-source, but have a $99 download fee (which includes both). The core library is free.

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Oct 15, 2011 at 22:45

Lilith River

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