Compress Image

Prerequisites

• I have written a descriptive issue title
• I have verified that I am using the latest version of Magick.NET

Question

I just install Magick.net from nuget and I have a problem when I want to compress and resize image from IFormFile (Net Core 2.1)

Here my sample code var stream = file.OpenReadStream(); using (MemoryStream ms = new MemoryStream()) { stream.CopyTo(ms); ImageOptimizer optimizer = new ImageOptimizer(); optimizer.LosslessCompress(ms); //error here: Value cannot be empty - Params: Stream }

If I load file from physical path, it’s working fine, but I need compress and resize before upload image. Please help me!!!

[dlemstra]

You need to set the Position of the memory stream back to 0 before you pass it to the LosslessCompress method. I will see if I can give a better error message when this happens.

[franva]

@dlemstra agreed. thanks for your reply.