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Converting HTML to PDF using iTextSharp dll in ASP.NET With C#

Converting HTML to PDF using iTextSharp dll in ASP.NET With C#

Using iTextSharp we can easily convert HTML to pdf with smart effort only. This iTextSharp is open source so, we can use in our server application without any cost for this conversion. Below application will convert html to pdf document with password protection. You can also have docx to pdf conversion with out any third party tools.

Converting HTML to PDF using iTextSharp dll
Converting HTML to PDF using iTextSharp dll 

Steps for converting html to pdf using iTextSharp:

1. Take iTextsharp dll from here. under bin folder.
2. in the below code, CreatePDFFromHTMLFile method will convert html to pdf conversion. 
3. TestPDF Namespace, will get from here.under app_code folder.
4. Here you can set password to protect your pdf document.
5. After your execution u will get generated pdf document under files folder.

Note: if you don't want password protection to your generated pdf document. just do below steps.
a. commet "//string password = "password";" under CreatePDFFromHTMLFile method.
b. After that, replace this line (we are removing password to null).

 iTextSharp.text.pdf.PdfEncryptor.Encrypt(reader, new FileStream(ModifiedFileName, FileMode.Append), iTextSharp.text.pdf.PdfWriter.STRENGTH128BITS, password, "", iTextSharp.text.pdf.PdfWriter.AllowPrinting);


 iTextSharp.text.pdf.PdfEncryptor.Encrypt(reader, new FileStream(ModifiedFileName, FileMode.Append), iTextSharp.text.pdf.PdfWriter.STRENGTH128BITS, "", "", iTextSharp.text.pdf.PdfWriter.AllowPrinting);

   protected void Page_Load(object sender, EventArgs e)
            string strHtml = string.Empty;
            //HTML File path -
            string htmlFileName = Server.MapPath("~") + "\\files\\" + "ConvertHTMLToPDF.htm";
            //pdf file path. -
            string pdfFileName = Request.PhysicalApplicationPath + "\\files\\" + "ConvertHTMLToPDF.pdf";

            //reading html code from html file
            FileStream fsHTMLDocument = new FileStream(htmlFileName, FileMode.Open, FileAccess.Read);
            StreamReader srHTMLDocument = new StreamReader(fsHTMLDocument);
            strHtml = srHTMLDocument.ReadToEnd();

            strHtml = strHtml.Replace("\r\n", "");
            strHtml = strHtml.Replace("\0", "");

            CreatePDFFromHTMLFile(strHtml, pdfFileName);

            Response.Write("pdf creation successfully with password -");
        catch (Exception ex)

    public void CreatePDFFromHTMLFile(string HtmlStream, string FileName)
            object TargetFile = FileName;
            string ModifiedFileName = string.Empty;
            string FinalFileName = string.Empty;

            /* To add a Password to PDF - */
            TestPDF.HtmlToPdfBuilder builder = new TestPDF.HtmlToPdfBuilder(iTextSharp.text.PageSize.A4);
            TestPDF.HtmlPdfPage first = builder.AddPage();
            byte[] file = builder.RenderPdf();
            File.WriteAllBytes(TargetFile.ToString(), file);

            iTextSharp.text.pdf.PdfReader reader = new iTextSharp.text.pdf.PdfReader(TargetFile.ToString());
            ModifiedFileName = TargetFile.ToString();
            ModifiedFileName = ModifiedFileName.Insert(ModifiedFileName.Length - 4, "1");

            string password = "password";
            iTextSharp.text.pdf.PdfEncryptor.Encrypt(reader, new FileStream(ModifiedFileName, FileMode.Append), iTextSharp.text.pdf.PdfWriter.STRENGTH128BITS, password, "", iTextSharp.text.pdf.PdfWriter.AllowPrinting);
            if (File.Exists(TargetFile.ToString()))
            FinalFileName = ModifiedFileName.Remove(ModifiedFileName.Length - 5, 1);
            File.Copy(ModifiedFileName, FinalFileName);
            if (File.Exists(ModifiedFileName))

        catch (Exception ex)
            throw ex;

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