Error when action return FileResult

[alexmaycon]

In a Controller, I have an action that returns the type FileResult. Even adding the [AutoWrapIgnore] tag to the action is returning the error below:

System.ObjectDisposedException: Cannot access a closed Stream. at System.IO.MemoryStream.Seek(Int64 offset, SeekOrigin loc) at AutoWrapper.Base.WrapperBase.InvokeAsyncBase(HttpContext context, AutoWrapperMembers awm) at AutoWrapper.AutoWrapperMiddleware.InvokeAsync(HttpContext context) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Localization.RequestLocalizationMiddleware.Invoke(HttpContext context) at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContextOfT1.ProcessRequestAsync()`

Any suggestion?

[proudmonkey]

Try using FileStreamResult like this:

        private readonly IWebHostEnvironment _env;
        public PersonsController(IWebHostEnvironment env)
        {
            _env = env;
        }

        [HttpGet("getfile")]
        [AutoWrapIgnore]
        public async Task<FileStreamResult> GetFile()
        {
            var path = $"{_env.ContentRootPath}/Folder/somefile.txt";
            var stream = System.IO.File.OpenRead(path);
            return new FileStreamResult(stream, "application/octet-stream");
        }

[alexmaycon]

Works fine, thanks!

[arhen]

Seems like my issues at #27 similar to this. But in my case, there is no file on my server. I've create my pdf using dinktopdf, then convert its result to MemoryStream, so it can matchup your suggestion above, but its output still json of my pdf.

                var globalSettings = new GlobalSettings
                {
                    ColorMode = ColorMode.Color,
                    Orientation = Orientation.Landscape,
                    PaperSize = PaperKind.A4,
                    Margins = new MarginSettings { Top = 10 },
                    DocumentTitle = "PDF Report",
                };

                var objectSettings = new ObjectSettings
                {
                    PagesCount = true,
                    HtmlContent = TemplateGenerator.GetAllReports(allReports, idCulture.DateTimeFormat.GetMonthName(Convert.ToInt32(month)), year),
                    WebSettings = { DefaultEncoding = "utf-8", UserStyleSheet = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot/css", "report_style.css") },
                    FooterSettings = { FontName = "Arial", FontSize = 9, Line = true, Right = "Page [page] of [toPage]", Left = "SF-216/2012-AVS Rev.0", Spacing = 1.8 }
                };

                var pdf = new HtmlToPdfDocument()
                {
                    GlobalSettings = globalSettings,
                    Objects = { objectSettings }
                };

                var file = _converter.Convert(pdf);
                var fileStream = new MemoryStream(file);

                _logger.LogInfo($"Report PDF Generated. Returned report PDF to client");
                return new FileStreamResult(fileStream, "application/pdf");