System.AccessViolationException' occurred in WkHtmlToPdfDotNet.dll

[crmmvio]

When I try to generate a pdf twice in a row the following error occurs:

Erro An unhandled exception of type 'System.AccessViolationException' occurred in WkHtmlToPdfDotNet.dll: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

` var htmlContent = await this.RenderViewAsync("PrintCoverSheet", viewModel, false);

        using (var converter = new SynchronizedConverter(new PdfTools()))
        {
            converter.PhaseChanged += Converter_PhaseChanged;
            converter.ProgressChanged += Converter_ProgressChanged;
            converter.Finished += Converter_Finished;
            converter.Warning += Converter_Warning;
            converter.Error += Converter_Error;

            var doc = new HtmlToPdfDocument()
            {
                GlobalSettings = {
                    PaperSize = PaperKind.A4,
                    ColorMode = ColorMode.Color,
                    Orientation = Orientation.Portrait,
                    Margins = new MarginSettings(5,5,5,5) {Unit = Unit.Millimeters}
                },

                Objects = {
                    new ObjectSettings()
                    {
                        WebSettings = { DefaultEncoding = "utf-8" },
                        UseExternalLinks = false,
                        UseLocalLinks = true,
                        IncludeInOutline = true,
                        Page = Url.AbsoluteAction("GeraFolhaRosto", "FolhaRosto", new{id= viewModel.Id})
                    }
                }
            };

            dataPdf = converter.Convert(doc);
        }

        Response.Headers.Add("content-disposition", $"attachment; filename={filename}");
        return File(dataPdf, "application/pdf", filename);

`

[HakanL]

You need to only hold a singleton of the SynchronizedConverter.

[crmmvio]

In the Startup file already has

services.AddSingleton(typeof(IConverter), new SynchronizedConverter(new PdfTools()));

[HakanL]

Then you should use that, instead of creating a new instance: using (var converter = new SynchronizedConverter(new PdfTools()))

[crmmvio]

see above my code is exactly like this

[HakanL]

Yes, that's what's wrong, you should NOT create a new instance, instead you should use the singleton.

[crmmvio]

You would have an example of correct use, this one I got from the git documentation

[HakanL]

We do, it's right here: https://github.com/HakanL/WkHtmlToPdf-DotNet/blob/master/src/TestWebServer/Controllers/ConvertController.cs

[crmmvio]

ok now i understand, use by IOC, tks!!