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="; Cursor = Cursors.WaitCursor; // Convert HTML to PDF using the settings above string outPdfFile = @"DemoAppFiles\Output\HTML_to_PDF\Custom_Internal_Links.pdf"; try { byte[] outPdfBuffer = null; if (convertHtmlRadioButton.Checked) { string htmlWithInternalLinksAttributes = htmlStringTextBox.Text; string baseUrl = baseUrlTextBox.Text; // Convert a HTML string with internal links to a PDF document in a memory buffer outPdfBuffer = htmlToPdfConverter.ConvertHtml(htmlWithInternalLinksAttributes, baseUrl); } else { string url = urlTextBox.Text; // Convert a HTML page with internal links to a PDF document in a memory buffer outPdfBuffer = htmlToPdfConverter.ConvertUrl(url); } // 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 { 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)); } }