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="; string param1Name = param1NameTextBox.Text.Length > 0 ? param1NameTextBox.Text : "param1"; string param1Value = param1ValueTextBox.Text.Length > 0 ? param1ValueTextBox.Text : "Value 1"; string param2Name = param2NameTextBox.Text.Length > 0 ? param2NameTextBox.Text : "param2"; string param2Value = param2ValueTextBox.Text.Length > 0 ? param2ValueTextBox.Text : "Value 2"; string param3Name = param3NameTextBox.Text.Length > 0 ? param3NameTextBox.Text : "param3"; string param3Value = param3ValueTextBox.Text.Length > 0 ? param3ValueTextBox.Text : "Value 3"; string param4Name = param4NameTextBox.Text.Length > 0 ? param4NameTextBox.Text : "param4"; string param4Value = param4ValueTextBox.Text.Length > 0 ? param4ValueTextBox.Text : "Value 4"; string param5Name = param5NameTextBox.Text.Length > 0 ? param5NameTextBox.Text : "param5"; string param5Value = param5ValueTextBox.Text.Length > 0 ? param5ValueTextBox.Text : "Value 5"; string urlToConvert = urlTextBox.Text; if (postMethodRadioButton.Checked) { htmlToPdfConverter.HttpPostFields.Add(param1Name, param1Value); htmlToPdfConverter.HttpPostFields.Add(param2Name, param2Value); htmlToPdfConverter.HttpPostFields.Add(param3Name, param3Value); htmlToPdfConverter.HttpPostFields.Add(param4Name, param4Value); htmlToPdfConverter.HttpPostFields.Add(param5Name, param5Value); } else { Uri getMethodUri = new Uri(urlTextBox.Text); string query = getMethodUri.Query.Length > 0 ? "&" : "?" + String.Format("{0}={1}", param1Name, param1Value); query += String.Format("&{0}={1}", param2Name, param2Value); query += String.Format("&{0}={1}", param3Name, param3Value); query += String.Format("&{0}={1}", param4Name, param4Value); query += String.Format("&{0}={1}", param5Name, param5Value); urlToConvert = urlTextBox.Text + query; } Cursor = Cursors.WaitCursor; // Convert HTML to PDF using the settings above string outPdfFile = @"DemoAppFiles\Output\HTML_to_PDF\GET_and_POST.pdf"; try { // Convert the HTML page to a PDF document in a memory buffer byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(urlToConvert); // 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)); } }