How to know the remaining space in pdf last page

[AlexKarpenko]

Hi,
I'm have some PDF files and need add to end of documents 2 QRCode whits signers information. I'm need to get size of remaining space on page, to understand place QRCodes to end page or addin new page.
is it possible to use Spire.PDF to calculate the free space on the page?

[Triste.Dai]

Hi,

Thanks for your inquiry.
Please see the following code for reference.

Code: Select all

            PdfDocument pdf = new PdfDocument();
            pdf.LoadFromFile("sample.pdf");
            PdfPageBase p = pdf.Pages[0];
            // find all texts
            string allTexts = p.ExtractText();
            string[] tr = allTexts.Split(' ');

            // find the last word
            string wanted = tr[tr.Length - 2];
            // get PdfTextFind colloection
            PdfTextFind[] result = p.FindText(wanted, TextFindParameter.None).Finds;
            PdfTextFind text = result[result.Length - 1];
            List<RectangleF> list = text.TextBounds;
            RectangleF rf = list[list.Count - 1];
            // get the height of the text
            float textBoundHeight = rf.Height;
            float textPosition = text.Position.Y;
            // get height of the page
            float pageHeight = p.Size.Height;
            // calculate the free height
            float freeHeight = pageHeight - textBoundHeight - textPosition;

If the code does not meet your requirement, please provide your pdf documents to help us work out a solution for you. You can send them to us via email ([email protected]) or attach them here. Thanks for your assistance.

Sincerely,
Triste
E-iceblue support team

[AlexKarpenko]

The code works fine. Thank you very much!

[Abel.He]

Hello,

Thanks for your feedback.
If you have any issue in the future, just feel free to contact us.

Sincerely,
Abel
E-iceblue support team