private 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 = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og="; // Add a page to PDF document PdfPage pdfPage = pdfDocument.AddPage(); // Set user and owner passwords if (userPasswordTextBox.Text.Length > 0) pdfDocument.Security.UserPassword = userPasswordTextBox.Text; if (ownerPasswordTextBox.Text.Length > 0) pdfDocument.Security.OwnerPassword = ownerPasswordTextBox.Text; if (pdfDocument.Security.UserPassword != null && pdfDocument.Security.UserPassword.Length > 0 && (pdfDocument.Security.OwnerPassword == null || pdfDocument.Security.OwnerPassword.Length == 0 || pdfDocument.Security.UserPassword == pdfDocument.Security.OwnerPassword)) { // A user password is set but the owner password is not set or is identical to user password // Set a different owner password pdfDocument.Security.OwnerPassword = pdfDocument.Security.UserPassword + "_owner"; } // Set PDF document permissions pdfDocument.Security.CanPrint = printEnabledCheckBox.Checked; pdfDocument.Security.CanCopyContent = copyContentEnabledCheckBox.Checked; pdfDocument.Security.CanEditContent = editContentEnabledCheckBox.Checked; pdfDocument.Security.CanEditAnnotations = editAnnotationsEnabledCheckBox.Checked; pdfDocument.Security.CanFillFormFields = fillFormFieldsEnabledCheckBox.Checked; Cursor = Cursors.WaitCursor; string outPdfFile = @"DemoAppFiles\Output\PDF_Creator\Set_Permissions_Password.pdf"; try { // Create a HTML to PDF element to add to document HtmlToPdfElement htmlToPdfElement = new HtmlToPdfElement(urlTextBox.Text); // Optionally set a delay before conversion to allow asynchonous scripts to finish htmlToPdfElement.ConversionDelay = 2; // Add the HTML to PDF element to document pdfPage.AddElement(htmlToPdfElement); // Save the PDF document in a memory buffer byte[] outPdfBuffer = pdfDocument.Save(); // Write the memory buffer in a PDF file System.IO.File.WriteAllBytes(outPdfFile, outPdfBuffer); } catch (Exception ex) { // The PDF creation failed MessageBox.Show(String.Format("Create PDF Document Error. {0}", ex.Message)); return; } finally { // Close the PDF document pdfDocument.Close(); Cursor = Cursors.Arrow; } // Open the created PDF document in default PDF viewer try { System.Diagnostics.Process.Start(outPdfFile); } catch (Exception ex) { MessageBox.Show(String.Format("Cannot open created PDF file '{0}'. {1}", outPdfFile, ex.Message)); } }