private void convertToPdfButton_Click(object sender, EventArgs e) { // 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 = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og="; // Select all images from HTML page htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementSelectors = new string[] { "img" }; // Exclude the original images from rendering becuase they will be replaced by an image from local file system htmlToPdfConverter.HiddenHtmlElementsSelectors = new string[] { "img" }; Cursor = Cursors.WaitCursor; string outPdfFile = @"DemoAppFiles\Output\HTML_to_PDF\Replace_with_Higher_Quality_Images.pdf"; Document pdfDocument = null; try { // Convert a HTML string with images to replace to a PDF document object pdfDocument = htmlToPdfConverter.ConvertUrlToPdfDocumentObject(urlTextBox.Text); // Replace the images selected in HTML using special attributes with images from local file system foreach (HtmlElementMapping imageElementInfo in htmlToPdfConverter.HtmlElementsMappingOptions.HtmlElementsMappingResult) { PdfPage imagePdfPage = imageElementInfo.PdfRectangles[0].PdfPage; RectangleF imageRectangle = imageElementInfo.PdfRectangles[0].Rectangle; ImageElement newImageElement = new ImageElement(imageRectangle.X, imageRectangle.Y, imageRectangle.Width, imageRectangle.Height, @"DemoAppFiles\Input\Images\box.jpg"); newImageElement.EnlargeEnabled = true; imagePdfPage.AddElement(newImageElement); } // 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 HTML to PDF conversion failed MessageBox.Show(String.Format("HTML to PDF Error. {0}", ex.Message)); return; } finally { // Close the PDF document if (pdfDocument != null) 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)); } }