Download PDF as password protected using ITEXTSHARP in asp.net

Download  PDF as  password protected using ITEXTSHARP in asp.net

  

This  is cool concept to protect pdf file with Password. In some cases  like bill statement and any confidential documents we have to maintain security ,so that no one else can view its content.so this problem can be solved using this pdf password protected method.

Step 1: Design web page using your content

<div>

        <div id="pdf" runat="server">

          <span style="color:brown">  kandy Here</span><br />

            <br />

            So have fun!!!!

        </div>

    <asp:Button ID="btnExport" runat="server" Text="Export To PDF" OnClick = "ExportToPDF" BackColor="YellowGreen" />

    </div>

Step 2: Logic on .cs Page

Namespace you have to be imports…

using iTextSharp.text;

using iTextSharp.text.html.simpleparser;

using iTextSharp.text.pdf;

protected void ExportToPDF(object sender, EventArgs e)

    {

        using (StringWriter sw = new StringWriter())

        {

            using (HtmlTextWriter hw = new HtmlTextWriter(sw))

            {

                //To Export all pages

                pdf.RenderControl(hw);

                StringReader sr = new StringReader(sw.ToString());

                Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);

                HTMLWorker htmlparser = new HTMLWorker(pdfDoc);

                using (MemoryStream memoryStream = new MemoryStream())

                {

                    PdfWriter.GetInstance(pdfDoc, memoryStream);

                    pdfDoc.Open();

                    htmlparser.Parse(sr);

                    pdfDoc.Close();

                    byte[] bytes = memoryStream.ToArray();

                    memoryStream.Close();

                    using (MemoryStream input = new MemoryStream(bytes))

                    {

                        using (MemoryStream output = new MemoryStream())

                        {

                            string password = "kandy";

                            PdfReader reader = new PdfReader(input);

                            PdfEncryptor.Encrypt(reader, output, true, password, password, PdfWriter.ALLOW_SCREENREADERS);

                            bytes = output.ToArray();

                            Response.ContentType = "application/pdf";

                            Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.pdf");

                            Response.Cache.SetCacheability(HttpCacheability.NoCache);

                            Response.BinaryWrite(bytes);

                            Response.End();

                        }

                    }

                }

            }

        }

    }

It will look like :-