How to resize image after being uploaded in ASP.NET Core 2.0

Rana Mujahid picture Rana Mujahid · Apr 6, 2018 · Viewed 13.9k times · Source

I want to resize an image and save this image multiple times with different sizes into a folder. I have tried ImageResizer or CoreCompat.System.Drawing but these libraries not compatible with .Net core 2. I have searched a lot of about this but i can't find any proper solution. like in MVC4 i have used as:

public ActionResult Upload(HttpPostedFileBase file)
{
if (file != null)
{
    var versions = new Dictionary<string, string>();

    var path = Server.MapPath("~/Images/");

    //Define the versions to generate
    versions.Add("_small", "maxwidth=600&maxheight=600&format=jpg";);
    versions.Add("_medium", "maxwidth=900&maxheight=900&format=jpg");
    versions.Add("_large", "maxwidth=1200&maxheight=1200&format=jpg");

    //Generate each version
    foreach (var suffix in versions.Keys)
    {
        file.InputStream.Seek(0, SeekOrigin.Begin);

        //Let the image builder add the correct extension based on the output file type
        ImageBuilder.Current.Build(
            new ImageJob(
                file.InputStream,
                path + file.FileName + suffix,
                new Instructions(versions[suffix]),
                false,
                true));
    }
}

return RedirectToAction("Index");
}

but in Asp.Net core 2.0 i am stuck. i have no idea how can i implement this in .Net core 2. Any one please can help me.

Answer

Frederik Carlier picture Frederik Carlier · Jun 1, 2018

.NET Core 2.0 ships with System.Drawing.Common, which is the official implementation of System.Drawing for .NET Core.

Instead of CoreCompat.System.Drawing, can you try to install System.Drawing.Common and check whether that works?