public ActionResult CreatePdf(IFormCollection collection)
        {
            // Create a PDF document
            Document pdfDocument = new Document();

            // Set license key received after purchase to use the converter in licensed mode
            // Leave it not set to use the converter in demo mode
            pdfDocument.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

            // Add a page to PDF document
            PdfPage pdfPage = pdfDocument.AddPage();

            try
            {
                string htmlWithDigitalSignatureMarker = collection["htmlStringTextBox"];
                string baseUrl = collection["baseUrlTextBox"];

                // Add a HTML string with a marker for digital signature to PDF document
                HtmlToPdfElement htmlToPdfElement = new HtmlToPdfElement(htmlWithDigitalSignatureMarker, baseUrl);
                pdfPage.AddElement(htmlToPdfElement);

                // Make the HTML element with 'digital_signature_element' mapping ID a link to digital signature properties
                HtmlElementMapping digitalSignatureMapping = htmlToPdfElement.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("digital_signature_element");
                if (digitalSignatureMapping != null)
                {
                    PdfPage    digitalSignaturePage      = digitalSignatureMapping.PdfRectangles[0].PdfPage;
                    RectangleF digitalSignatureRectangle = digitalSignatureMapping.PdfRectangles[0].Rectangle;

                    string certificateFilePath = m_hostingEnvironment.ContentRootPath + "/wwwroot" + "/DemoAppFiles/Input/Certificates/evopdf.pfx";

                    // Get the certificate from password protected PFX file
                    DigitalCertificatesCollection certificates = DigitalCertificatesStore.GetCertificates(certificateFilePath, "evopdf");
                    DigitalCertificate            certificate  = certificates[0];

                    // Create the digital signature
                    DigitalSignatureElement signature = new DigitalSignatureElement(digitalSignatureRectangle, certificate);
                    signature.Reason      = "Protect the document from unwanted changes";
                    signature.ContactInfo = "The contact email is [email protected]";
                    signature.Location    = "Development server";
                    digitalSignaturePage.AddElement(signature);
                }

                // Save the PDF document in a memory buffer
                byte[] outPdfBuffer = pdfDocument.Save();

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

                return(fileResult);
            }
            finally
            {
                // Close the PDF document
                pdfDocument.Close();
            }
        }
        protected void convertToPdfButton_Click(object sender, EventArgs e)
        {
            // Create a PDF document
            Document pdfDocument = new Document();

            // Set license key received after purchase to use the converter in licensed mode
            // Leave it not set to use the converter in demo mode
            pdfDocument.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

            // Add a page to PDF document
            PdfPage pdfPage = pdfDocument.AddPage();

            try
            {
                string htmlWithDigitalSignatureMarker = htmlStringTextBox.Text;
                string baseUrl = baseUrlTextBox.Text;

                // Add a HTML string with a marker for digital signature to PDF document
                HtmlToPdfElement htmlToPdfElement = new HtmlToPdfElement(htmlWithDigitalSignatureMarker, baseUrl);
                pdfPage.AddElement(htmlToPdfElement);

                // Make the HTML element with 'digital_signature_element' mapping ID a link to digital signature properties
                HtmlElementMapping digitalSignatureMapping = htmlToPdfElement.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("digital_signature_element");
                if (digitalSignatureMapping != null)
                {
                    PdfPage    digitalSignaturePage      = digitalSignatureMapping.PdfRectangles[0].PdfPage;
                    RectangleF digitalSignatureRectangle = digitalSignatureMapping.PdfRectangles[0].Rectangle;

                    string certificateFilePath = Server.MapPath(@"~/DemoAppFiles/Input/Certificates/evopdf.pfx");

                    // Get the certificate from password protected PFX file
                    DigitalCertificatesCollection certificates = DigitalCertificatesStore.GetCertificates(certificateFilePath, "evopdf");
                    DigitalCertificate            certificate  = certificates[0];

                    // Create the digital signature
                    DigitalSignatureElement signature = new DigitalSignatureElement(digitalSignatureRectangle, certificate);
                    signature.Reason      = "Protect the document from unwanted changes";
                    signature.ContactInfo = "The contact email is [email protected]";
                    signature.Location    = "Development server";
                    digitalSignaturePage.AddElement(signature);
                }

                // Save the PDF document in a memory buffer
                byte[] outPdfBuffer = pdfDocument.Save();

                // Send the PDF as response to browser

                // Set response content type
                Response.AddHeader("Content-Type", "application/pdf");

                // Instruct the browser to open the PDF file as an attachment or inline
                Response.AddHeader("Content-Disposition", String.Format("attachment; filename=Digital_Signatures.pdf; size={0}", outPdfBuffer.Length.ToString()));

                // Write the PDF document buffer to HTTP response
                Response.BinaryWrite(outPdfBuffer);

                // End the HTTP response and stop the current page processing
                Response.End();
            }
            finally
            {
                // Close the PDF document
                pdfDocument.Close();
            }
        }
        public ActionResult ConvertHtmlToPdf(IFormCollection collection)
        {
            // Create a HTML to PDF converter object with default settings
            HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();

            // Set license key received after purchase to use the converter in licensed mode
            // Leave it not set to use the converter in demo mode
            htmlToPdfConverter.LicenseKey = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

            // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
            // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
            htmlToPdfConverter.ConversionDelay = 2;

            Document pdfDocument = null;

            try
            {
                string htmlWithDigitalSignatureMarker = collection["htmlStringTextBox"];
                string baseUrl = collection["baseUrlTextBox"];

                // Convert a HTML string with a marker for digital signature to a PDF document object
                pdfDocument = htmlToPdfConverter.ConvertHtmlToPdfDocumentObject(htmlWithDigitalSignatureMarker, baseUrl);

                // Make the HTML element with 'digital_signature_element' mapping ID a link to digital signature properties
                HtmlElementMapping digitalSignatureMapping = htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult.GetElementByMappingId("digital_signature_element");
                if (digitalSignatureMapping != null)
                {
                    PdfPage    digitalSignaturePage      = digitalSignatureMapping.PdfRectangles[0].PdfPage;
                    RectangleF digitalSignatureRectangle = digitalSignatureMapping.PdfRectangles[0].Rectangle;

                    string certificateFilePath = m_hostingEnvironment.ContentRootPath + "/wwwroot" + "/DemoAppFiles/Input/Certificates/evopdf.pfx";

                    // Get the certificate from password protected PFX file
                    DigitalCertificatesCollection certificates = DigitalCertificatesStore.GetCertificates(certificateFilePath, "evopdf");
                    DigitalCertificate            certificate  = certificates[0];

                    // Create the digital signature
                    DigitalSignatureElement signature = new DigitalSignatureElement(digitalSignatureRectangle, certificate);
                    signature.Reason      = "Protect the document from unwanted changes";
                    signature.ContactInfo = "The contact email is [email protected]";
                    signature.Location    = "Development server";
                    digitalSignaturePage.AddElement(signature);
                }

                // Save the PDF document in a memory buffer
                byte[] outPdfBuffer = pdfDocument.Save();

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

                return(fileResult);
            }
            finally
            {
                // Close the PDF document
                if (pdfDocument != null)
                {
                    pdfDocument.Close();
                }
            }
        }