Add a File method overload on controller and pages.

[javiercn]

This method (and its associated action result) will perform content negotiation, serialize the object with a formatter and set the content disposition header.

This is useful when the object being sent to the client is the in memory representation of a document and you want the client to download the document.

[mkArtakMSFT]

@javiercn, we need more details on this. Isn't this what you get with standard action methods - which by-default get content negotiation enabled?

[javiercn]

@mkArtakMSFT With standard action methods you only get content-negotiation, but you still have to set the content-disposition header yourself on the response. This overload streamlines that.

FileResult(object file, string fileName, string contentType)

public class ObjectFileResult : ObjectResult
{
    public string FileName { get; set; }
    public string ContentType { get; set; }

    public void override OnFormatting(ActionContext context)
    {
        SetStatusCode();
        SetContentType();
        SetContentDispositionHeader();
    }
}

[rynowak]

@javiercn is this a dupe of #6260 ?

[javiercn]

@rynowak Nope. The moral equivalent of that without the json convert https://github.com/aspnet/Identity/pull/1559/files#diff-c797f826e471413030a3cace8d328ee8R38

[mkArtakMSFT]

Closing this issue as there was no community ask for this.