Protected Sub convertToPdfButton_Click(ByVal sender As Object, ByVal e As EventArgs)
    ' Create a HTML to PDF converter object with default settings
    Dim htmlToPdfConverter As 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="

    Dim param1Name As String = If(param1NameTextBox.Text.Length > 0, param1NameTextBox.Text, "param1")
    Dim param1Value As String = If(param1ValueTextBox.Text.Length > 0, param1ValueTextBox.Text, "Value 1")

    Dim param2Name As String = If(param2NameTextBox.Text.Length > 0, param2NameTextBox.Text, "param2")
    Dim param2Value As String = If(param2ValueTextBox.Text.Length > 0, param2ValueTextBox.Text, "Value 2")

    Dim param3Name As String = If(param3NameTextBox.Text.Length > 0, param3NameTextBox.Text, "param3")
    Dim param3Value As String = If(param3ValueTextBox.Text.Length > 0, param3ValueTextBox.Text, "Value 3")

    Dim param4Name As String = If(param4NameTextBox.Text.Length > 0, param4NameTextBox.Text, "param4")
    Dim param4Value As String = If(param4ValueTextBox.Text.Length > 0, param4ValueTextBox.Text, "Value 4")

    Dim param5Name As String = If(param5NameTextBox.Text.Length > 0, param5NameTextBox.Text, "param5")
    Dim param5Value As String = If(param5ValueTextBox.Text.Length > 0, param5ValueTextBox.Text, "Value 5")

    Dim urlToConvert As String = urlTextBox.Text

    If postMethodRadioButton.Checked Then
        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
        Dim getMethodUri As New Uri(urlTextBox.Text)

        Dim query As String = If(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
    End If

    ' Convert the HTML page to a PDF document in a memory buffer
    Dim outPdfBuffer() As Byte = htmlToPdfConverter.ConvertUrl(urlToConvert)

    ' 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=GET_and_POST.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()
End Sub