Convert HTML to PDF in ASP.NET MVC

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Im working in a project which requires current html page to convert in pdf and that pdf will automatically save on button click on server and its reference will be save in da

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梦如初夏

2021-02-06 08:11

use ABCpdf dll, here in text area we can write html code and on a button click corresponding pdf will be shown.ABCpdf trail version is easily available for downloding, adding linlk to download the ABCpdf dll https://www.websupergoo.com/download.htm

index.cshtml

      @using (Html.BeginForm("covertopdf", "simple", FormMethod.Post))
{
        <p style="margin-top:50px">
            Input Html: @Html.TextArea("Htmlcontent", new { @class = "form-control",@cols="160" , @rows="20"})<br />
            <input type="submit" class="btn-primary" value="Convertopdf" />
        </p>
}

SimpleController.cs

 public class SimpleController : Controller
    {
        public class FileViewModel
        {
            public byte[] Content { get; set; }
            public string Extension { get; set; }
            public string FileName { get; set; }
        }

       [HttpPost]
       [ValidateInput(false)]
       public FileStreamResult covertopdf(string Htmlcontent)
        //public FileStreamResult covertopdf(file fo)
        {
            var result = ExecuteAction(() =>
            {
                var fileViewmodel = new FileViewModel
                {
                    Content = ConvertHtmlToPdf(Htmlcontent),
                    //Content= ConvertHtmlToPdf(fo.cont),
                    Extension = "application/pdf",
                    FileName = "Policy Information.pdf"
                };
                return fileViewmodel;
            }, "covertopdf");
            // return result;
            HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
            // Content is the file 
            Stream stream = new MemoryStream(result.Content);
            return new FileStreamResult(stream, "application/pdf")
            {

            };
        }



        public T ExecuteAction<T>(Func<T> action, string method)
        {
            try
            {
                return action.Invoke();
            }
            catch (Exception ex)
            {
                return default(T);
            }
        }



        protected byte[] ConvertHtmlToPdf(string html, string header = null, string footer = null, bool isPageNumberInFooter = false)
        {
            // Create ABCpdf Doc object
            var doc = new Doc();
            if (header == null && footer == null)
                doc.Rect.Inset(20, 20);
            else
                doc.Rect.String = "0 70 600 760"; /*padding from left, padding from bottom, width from left, height from bottom*/
            // Add html to Doc   
            //html = "<html><head></head><body></body></html>";
            int theId = doc.AddImageHtml(html);

            // Loop through document to create multi-page PDF
            while (true)
            {
                if (!doc.Chainable(theId))
                    break;
                doc.Page = doc.AddPage();
                theId = doc.AddImageToChain(theId);
            }
            var count = doc.PageCount;

            /*****************Footer area******************/
            if (footer != null)
            {
                var newfooter = "";
                doc.Rect.String = "40 20 580 50";
                for (int i = 1; i <= count; i++)
                {

                    doc.PageNumber = i;
                    if (isPageNumberInFooter)
                    {
                        newfooter = footer.Replace("PageNumber", "Page " + i.ToString() + " of " + count.ToString());
                        int id = doc.AddImageHtml(newfooter);

                        while (true)
                        {
                            if (!doc.Chainable(id))
                                break;
                            id = doc.AddImageToChain(id);
                        }
                    }
                    else
                        doc.AddText(footer);
                }
            }
            /*****************Footer area******************/


            // Flatten the PDF
            for (int i = 1; i <= doc.PageCount; i++)
            {
                doc.PageNumber = i;
                doc.Flatten();
            }

            var pdf = doc.GetData();
            doc.Clear();
            // Get PDF as byte array. Couls also use .Save() to save to disk
            return pdf;
        }
    }

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有刺的猬

2021-02-06 08:13

In short:

HTML Renderer for PDF using PdfSharp

    public static Byte[] PdfSharpConvert(String html)
    {
        Byte[] res = null;
        using (MemoryStream ms = new MemoryStream())
        {
            var pdf = TheArtOfDev.HtmlRenderer.PdfSharp.PdfGenerator.GeneratePdf(html, PdfSharp.PageSize.A4);
            pdf.Save(ms);
            res = ms.ToArray();
        }
        return res;
    }

More Detailed Answer

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一生所求

2021-02-06 08:14

There is special nuget package RazorPDF. It simple works. RazorPDF site

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死守一世寂寞

2021-02-06 08:15

The C# code below can be used in a MVC application to convert the current view to PDF and produce a PDF in a buffer that can be saved on server or sent to browser for download. The code is using evopdf library for .net to perform the HTML to PDF conversion:

[HttpPost]
public ActionResult ConvertCurrentPageToPdf(FormCollection collection)
{
    object model = null;
    ViewDataDictionary viewData = new ViewDataDictionary(model);

    // The string writer where to render the HTML code of the view
    StringWriter stringWriter = new StringWriter();

    // Render the Index view in a HTML string
    ViewEngineResult viewResult = ViewEngines.Engines.FindView(ControllerContext, "Index", null);
    ViewContext viewContext = new ViewContext(
            ControllerContext,
            viewResult.View,
            viewData,
            new TempDataDictionary(),
            stringWriter
            );
    viewResult.View.Render(viewContext, stringWriter);

    // Get the view HTML string
    string htmlToConvert = stringWriter.ToString();

    // Get the base URL
    String currentPageUrl = this.ControllerContext.HttpContext.Request.Url.AbsoluteUri;
    String baseUrl = currentPageUrl.Substring(0, currentPageUrl.Length - "Convert_Current_Page/ConvertCurrentPageToPdf".Length);

    // Create a HTML to PDF converter object with default settings
    HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();

    // Convert the HTML string to a PDF document in a memory buffer
    byte[] outPdfBuffer = htmlToPdfConverter.ConvertHtml(htmlToConvert, baseUrl);

    // Send the PDF file to browser
    FileResult fileResult = new FileContentResult(outPdfBuffer, "application/pdf");
    fileResult.FileDownloadName = "Convert_Current_Page.pdf";

    return fileResult;
}

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醉话见心

2021-02-06 08:20

I used iDiTect.Converter to convert html to pdf in asp.net mvc https://www.iditect.com/tutorial/html-to-pdf/, however it's not free code in short

public static Byte[] ConvertToBytes()
{
HtmlToPdfConverter converter = new HtmlToPdfConverter();

converter.DefaultStyleSheet = ".para{font-size: 24px; color: #FF0000;}";

string htmlContent = "<p class=\"para\">Content with special style.</p><p>Content without style</p>";
converter.Load(htmlContent);

return converter.SaveAsBytes();
}

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广开言路

2021-02-06 08:27
There are a number of html to pdf converters for .NET available out there. I can recommend ExpertPdf (www.html-to-pdf.net).

Code looks something like this:
```
PdfConverter pdfConverter = new PdfConverter();

pdfConverter.PdfDocumentOptions.PdfPageSize = PdfPageSize.A4;
byte[] downloadBytes = pdfConverter.GetPdfFromUrlBytes(url);
```
There is an online demo here: http://www.html-to-pdf.net/free-online-pdf-converter.aspx
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