EVO HTML to PDF Converter

Add Text Notes to a PDF Document

EVO HTML to PDF Converter for .NET Documentation

EVO HTML to PDF Converter allows you to add text notes to a PDF document. The text notes are created by adding EvoPdfTextNoteElement objects to a PDF document. You can add text notes with various types of icons to a PDF document. Also, the text notes can be initially in an open or closed state.

Code Sample - Add Text Notes to a PDF Document
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protected void createPdfButton_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 = "4W9+bn19bn5ue2B+bn1/YH98YHd3d3c=";

    // Add a page to PDF document
    PdfPage pdfPage = pdfDocument.AddPage();

    try
    {
        // The titles font used to mark various sections of the PDF document
        PdfFont titleFont = pdfDocument.AddFont(new Font("Times New Roman", 10, FontStyle.Bold, GraphicsUnit.Point));
        PdfFont subtitleFont = pdfDocument.AddFont(new Font("Times New Roman", 8, FontStyle.Regular, GraphicsUnit.Point));

        float xLocation = 5;
        float yLocation = 5;

        // Add document title
        TextElement titleTextElement = new TextElement(xLocation, yLocation, "Add Text Notes to a PDF Document", titleFont);
        AddElementResult addElementResult = pdfPage.AddElement(titleTextElement);

        yLocation = addElementResult.EndPageBounds.Bottom + 15;

        // Add the text element
        string text = "Click the next icon to open the the text note:";
        float textWidth = subtitleFont.GetTextWidth(text);
        TextElement textElement = new TextElement(xLocation, yLocation, text, subtitleFont);
        addElementResult = pdfPage.AddElement(textElement);

        RectangleF textNoteRectangle = new RectangleF(xLocation + textWidth + 1, yLocation, 10, 10);

        // Create the text note
        TextNoteElement textNoteElement = new TextNoteElement(textNoteRectangle, "This is an initially closed text note");
        textNoteElement.NoteIcon = TextNoteIcon.Note;
        textNoteElement.Open = false;
        pdfPage.AddElement(textNoteElement);

        yLocation = addElementResult.EndPageBounds.Bottom + 10;

        // Add the text element
        text = "This is an already opened text note:";
        textWidth = subtitleFont.GetTextWidth(text);
        textElement = new TextElement(xLocation, yLocation, text, subtitleFont);
        addElementResult = pdfPage.AddElement(textElement);

        textNoteRectangle = new RectangleF(xLocation + textWidth + 1, yLocation, 10, 10);

        // Create the text note
        TextNoteElement textNoteOpenedElement = new TextNoteElement(textNoteRectangle, "This is an initially opened text note");
        textNoteOpenedElement.NoteIcon = TextNoteIcon.Note;
        textNoteOpenedElement.Open = true;
        pdfPage.AddElement(textNoteOpenedElement);

        yLocation = addElementResult.EndPageBounds.Bottom + 10;

        // Add the text element
        text = "Click the next icon to open the the help note:";
        textWidth = subtitleFont.GetTextWidth(text);
        textElement = new TextElement(xLocation, yLocation, text, subtitleFont);
        addElementResult = pdfPage.AddElement(textElement);

        textNoteRectangle = new RectangleF(xLocation + textWidth + 1, yLocation, 10, 10);

        // Create the text note
        TextNoteElement helpNoteElement = new TextNoteElement(textNoteRectangle, "This is an initially closed help note");
        helpNoteElement.NoteIcon = TextNoteIcon.Help;
        helpNoteElement.Open = false;
        pdfPage.AddElement(helpNoteElement);

        yLocation = addElementResult.EndPageBounds.Bottom + 10;

        // Add the text element
        text = "This is an already opened help note:";
        textWidth = subtitleFont.GetTextWidth(text);
        textElement = new TextElement(xLocation, yLocation, text, subtitleFont);
        addElementResult = pdfPage.AddElement(textElement);

        textNoteRectangle = new RectangleF(xLocation + textWidth + 1, yLocation, 10, 10);

        // Create the text note
        TextNoteElement helpNoteOpenedElement = new TextNoteElement(textNoteRectangle, "This is an initially opened help note");
        helpNoteOpenedElement.NoteIcon = TextNoteIcon.Help;
        helpNoteOpenedElement.Open = true;
        pdfPage.AddElement(helpNoteOpenedElement);

        yLocation = addElementResult.EndPageBounds.Bottom + 10;

        // Add the text element
        text = "Click the next icon to open the comment:";
        textWidth = subtitleFont.GetTextWidth(text);
        textElement = new TextElement(xLocation, yLocation, text, subtitleFont);
        addElementResult = pdfPage.AddElement(textElement);

        textNoteRectangle = new RectangleF(xLocation + textWidth + 1, yLocation, 10, 10);

        // Create the text note
        TextNoteElement commentNoteElement = new TextNoteElement(textNoteRectangle, "This is an initially closed comment note");
        commentNoteElement.NoteIcon = TextNoteIcon.Comment;
        commentNoteElement.Open = false;
        pdfPage.AddElement(commentNoteElement);

        yLocation = addElementResult.EndPageBounds.Bottom + 10;

        // Add the text element
        text = "This is an already opened comment:";
        textWidth = subtitleFont.GetTextWidth(text);
        textElement = new TextElement(xLocation, yLocation, text, subtitleFont);
        addElementResult = pdfPage.AddElement(textElement);

        textNoteRectangle = new RectangleF(xLocation + textWidth + 1, yLocation, 10, 10);

        // Create the text note
        TextNoteElement commentNoteOpenedElement = new TextNoteElement(textNoteRectangle, "This is an initially opened comment note");
        commentNoteOpenedElement.NoteIcon = TextNoteIcon.Comment;
        commentNoteOpenedElement.Open = true;
        pdfPage.AddElement(commentNoteOpenedElement);

        yLocation = addElementResult.EndPageBounds.Bottom + 10;

        // Add the text element
        text = "Click the next icon to open the paragraph note: ";
        textWidth = subtitleFont.GetTextWidth(text);
        textElement = new TextElement(xLocation, yLocation, text, subtitleFont);
        addElementResult = pdfPage.AddElement(textElement);

        textNoteRectangle = new RectangleF(xLocation + textWidth + 1, yLocation, 10, 10);

        // Create the text note
        TextNoteElement paragraphNoteElement = new TextNoteElement(textNoteRectangle, "This is an initially closed paragraph note");
        paragraphNoteElement.NoteIcon = TextNoteIcon.Paragraph;
        paragraphNoteElement.Open = false;
        pdfPage.AddElement(paragraphNoteElement);

        yLocation = addElementResult.EndPageBounds.Bottom + 10;

        // Add the text element
        text = "Click the next icon to open the new paragraph note:";
        textWidth = subtitleFont.GetTextWidth(text);
        textElement = new TextElement(xLocation, yLocation, text, subtitleFont);
        addElementResult = pdfPage.AddElement(textElement);

        textNoteRectangle = new RectangleF(xLocation + textWidth + 1, yLocation, 10, 10);

        // Create the text note
        TextNoteElement newParagraphNoteElement = new TextNoteElement(textNoteRectangle, "This is an initially closed new paragraph note");
        newParagraphNoteElement.NoteIcon = TextNoteIcon.NewParagraph;
        newParagraphNoteElement.Open = false;
        pdfPage.AddElement(newParagraphNoteElement);

        yLocation = addElementResult.EndPageBounds.Bottom + 10;

        // Add the text element
        text = "Click the next icon to open the key note:";
        textWidth = subtitleFont.GetTextWidth(text);
        textElement = new TextElement(xLocation, yLocation, text, subtitleFont);
        addElementResult = pdfPage.AddElement(textElement);

        textNoteRectangle = new RectangleF(xLocation + textWidth + 1, yLocation, 10, 10);

        // Create the text note
        TextNoteElement keyNoteElement = new TextNoteElement(textNoteRectangle, "This is an initially closed key note");
        keyNoteElement.NoteIcon = TextNoteIcon.Key;
        keyNoteElement.Open = false;
        pdfPage.AddElement(keyNoteElement);

        // Save the PDF document in a memory buffer
        byte[] outPdfBuffer = pdfDocument.Save();

        // 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=Text_Notes.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();
    }
    finally
    {
        // Close the PDF document
        pdfDocument.Close();
    }
}