c# - How to auto-rotate an uploaded image -

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i have site i'm allowing users upload photos. these files uploaded webapi endpoint httppostedfile. after performing validation on uploaded file, stream:

var stream = httppostedfile.inputstream;

and resize:

        var instructions= new instructions         {             width = 80, height = 80,             outputformat = outputformat.jpeg,             mode = fitmode.crop,             autorotate = true         };          var smallresizedimage = new memorystream();         var imagejob = new imagejob(stream, smallresizedimage, instructions);         imagejob.build();

notice how in instructions, specify image should rotated. image not rotated, resized correctly.

i've tried setting key, same results:

instructions.add("autorotate", "true");

i using imageresizer version 3.4.3 without plugins or changes configuration settings.

based on previous comment nathanael jones, not copying stream bitmap or image, don't think exif information being removed.


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