Generate and download pdf file

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Generate and download pdf file

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#1 by (6 votes)

6

Is there any specific configuration to generate pdf file on the server? The problem is that locally in my local project works perfectly and when I upload to the server the file is not generated, the page is rendered forever until it reaches the timeout, the code snippet is this:

protected string GerarPDF(string html)
    {
        //Nome arquivo
        string nome = "Laudo_" + System.DateTime.Now.ToString().Replace(" ", "_").Replace("/", "_").Replace(":", "_") + ".pdf";
        var path = Path.Combine(Server.MapPath("~/Content/Uploads/Laudos"), nome);

        try
        {
            var pechkin = Factory.Create(new GlobalConfig());

            var pdf = pechkin.Convert(new ObjectConfig()
                                .SetLoadImages(true)
                                .SetPrintBackground(true)
                                .SetScreenMediaType(true)
                                .SetCreateExternalLinks(true)
                                .SetAllowLocalContent(true), html);

            using (FileStream file = System.IO.File.Create(path))
            {
                file.Write(pdf, 0, pdf.Length);
            }

            //Return the PDF file to download
            Response.Clear();

            Response.ClearContent();
            Response.ClearHeaders();

            Response.ContentType = "application/pdf";
            Response.AddHeader("Content-Disposition", string.Format("attachment;filename=" + nome + ", size={0}", pdf.Length));
            Response.BinaryWrite(pdf);

            Response.Flush();
            Response.End();

            return nome;
        }
        catch
        {
            nome = string.Empty;
            return nome;
        }


    }

I have implemented this solution but a data type conversion error occurs:

cannot implicity convert type

asp.net-mvc pechkin

asked by anonymous 09.04.2016 / 00:15

1 answer

Composer - What is it and what is it for? How ViewModel works in ASP.NET MVC

score 6 · Accepted Answer

This is the very wrong way to do. Nothing guarantees that you are actually manipulating the request with this.

There are two ways for you to resolve this correctly:

Making GerarPDF return byte[] ;

Make GerarPDF return FileAction . In this case, GerarPDF would be Action of your Controller .

In the first form, it looks like this:

protected byte[] GerarPDF(string html)
{
    //Retire isso aqui
    // string nome = "Laudo_" + System.DateTime.Now.ToString().Replace(" ", "_").Replace("/", "_").Replace(":", "_") + ".pdf";
    // var path = Path.Combine(Server.MapPath("~/Content/Uploads/Laudos"), nome);

    try
    {
        var pechkin = Factory.Create(new GlobalConfig());

        var pdf = pechkin.Convert(new ObjectConfig()
                            .SetLoadImages(true)
                            .SetPrintBackground(true)
                            .SetScreenMediaType(true)
                            .SetCreateExternalLinks(true)
                            .SetAllowLocalContent(true), html);

        using (MemoryStream file = new MemoryStream())
        {
            file.Write(pdf, 0, pdf.Length);
        }

        return pdf.ToArray();
    }
    catch
    {
        nome = string.Empty;
        return nome;
    }
}

And Controller :

    public ActionResult GerarLaudo()
    {
        // Coloque aqui a lógica pra gerar o HTML.
        byte[] arquivo = GerarPDF(html);
        return File(arquivo, System.Net.Mime.MediaTypeNames.Application.Octet, "Laudo.pdf");
    }

The second method is the same, except that you will not separate into a function called GerarPDF . It will call the Pechkin and return the file, all within the same Action .