how can I get image size (w x h) using Stream

Question

I have this code i am using to read uploaded file, but i need to get size of image instead but not sure what code can i use

HttpFileCollection collection = _cont         


        

Answer 1

Read the image into a buffer (you either have a Stream to read from or the byte[], because if you had the Image you'd have the dimensions anyway).

public Size GetSize(byte[] bytes)
{
   using (var stream = new MemoryStream(bytes))
   {
      var image = System.Drawing.Image.FromStream(stream);

      return image.Size;
   }
}

You can then go ahead and get the image dimensions:

var size = GetSize(bytes);

var width = size.Width;
var height = size.Height;

Answer 2

HttpPostedFile file = null;
file = Request.Files[0]

if (file != null && file.ContentLength > 0)
{
    System.IO.Stream fileStream = file.InputStream;
    fileStream.Position = 0;

    byte[] fileContents = new byte[file.ContentLength];
    fileStream.Read(fileContents, 0, file.ContentLength);

    System.Drawing.Image image = System.Drawing.Image.FromStream(new System.IO.MemoryStream(fileContents));
    image.Height.ToString(); 
}

Answer 3

First you have to write the image:

System.Drawing.Image image = System.Drawing.Image.FromStream (new System.IO.MemoryStream(byteArrayHere));

and afterwards you have the :

image.Height.ToString(); 

and the

image.Width.ToString();

note: you might want to add a check to be sure it's an image that was uploaded?